Convert eSignature Form iOS

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Plain Arrays are just as dangerous in C++ as they are in C. you can overshoot them, or give a bad index parameter and the whole thing goes off the rails.Pointers in C++ are the same pointers as in C, with all the things you need to do to make them safer to use, plus they can point to classes.Type restrictions are stricter in C++ than in C, so porting a C code base to C++ is mostly trivial unless some loose typing is involved, then you will have to be more explicit with the types.Arrays declared in C++ have their declared size as part of their type (stricter typing).int a[10] ; // type int[10] , not int*Structs are first class objects in C++ just like classes but with all public members.Struct declarations automatically generate the Big 5 default functions:Constructor,Copy constructor,Assignment constructor,Move constructor,Destructor.Function overloading is based on parameters being unique. C++ ‘mangles’ the function names internally to be unique based on return type and parameter type.Declaring an object causes its allocation and then runs its constructor. The object is fully ready once its construction is complete. If the object has members, they are constructed as well with sane default values.An object’s default initialization values for members of classes and structs:integer types set to zero;floating point types set to 0e0pointer members are not set. They must be explicitly initialized. Ifthe member will not be assigned at construction, you can specify aninitial value of nullptr in the definition or a constructor initialization list.Arrays are allocated but the values are not set if the array contents are not initialized by default. An array of class objects will have its contents initialized, but an array of ints or floats or pointers will not.reference members must be bound to initialized objects in the definition or the constructor.C has malloc() and free() — C++ has those too, but generally uses new and delete.new creates and initializes objects, leaving then in a ready to use state. If the object has initialization beyond that it is performed, then a pointer is returned.If any members of the object need initialization they are performed as well.In other words the full constructor code is performed when invoked with new.The object is created on the heap memory, and persists until deleted or the program ends.delete does a complete destruction of an object, and all its members, calling any destructors its members may have.Copying an object instance allocates a new instance and makes a binary copy of its contents. This is a shallow copy, though. If the object contains pointers or references to other objects as members, the pointers and references are copied, not what they point to. You have to write code to do the copying in that case.STL containers such as std::array, std::vector, std::string, etc, have code to automatically copy their entire contents, but custom classes need it to be written out.An initializer list is efficient in C++. If the class or struct is “trivially constructed”, that is all members are ready after calling the class constructor, then an initializer list can be used to automatically construct an instance with the members of the list. No extra copying needs to be done; the compiler will optimize the instantiation most of the time.std:string s[4] = { "one", "two", "three", "four"}; /* four std::strings are created with the contents of each char array. s is created and the addresses of each std::string instance are placed in the array. When x goes out of scope, the destructors of each element are called. */ struct K { int x[4]; int total; }; K k = { {1,2,3,4}, 10 }; // const double pi(3.1415926); // optimized by compiler double twopi = 2.0 * pi; // not optimized const double tau = pi + pi; // optimized // compiler is smart with this new syntax int a[] = { 4, 5, 6, 7, 8, 9, -1, -2, 0,-3 }; int x = 0; for(auto i : a) { std::cout << i << "\t" x = x + i; } std::cout << "\n" << x << "\n"; 4 5 6 7 8 9 -1 -2 0 -3 34 for( long x : { 0,1,2,3,4,5,6,7,8,9} ) { std::cout << x << ",\t"; if (x%5 ==0) std::cout << "\n"; } 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A C++ reference (&) is not a pointer. You have to declare a reference type with an initialization to a valid object. Copying a reference does not copy the object, but adds another reference to the object. You do not need to use pointer syntax with references; it is more like an alias than a pointer. References cannot be reassigned to any other object. When a reference goes out of scope, it unbinds from the object, but the object will still be around, bound to its declared label, until that goes out of scope, then the object destructs.Object obj; // declaration Object& objref = obj; // or references o // a becomes a reference to the input reference. void print( Object& a) { a.print(); } // both calls work // print(obj); // a is ref to obj print(objref); // a is copy of objref Object b(obj); // copy constructor Object c = obj; // copy assignment Object& d = objref; // copy reference, // objref and d refer to same object Object e(objref) // copy constructor // objref dereferenced automatically auto f = obj; // copy obj auto & g = obj; // reference obj auto h = objref; // copy obj auto & j = objref; // copy reference This makes references safer than pointers, yet you still get the pass by ref advantage, without the pointer hassle and syntax. Also you are guaranteed thatyou will not get a NULL pointer by accident passed in.C++ prefers nullptr over NULL, because NULL is a constant integer (0) so can be misused or ambiguous if functions are overloaded to accept integer parameters.nullptr cannot be converted to an integer, so always will refer to a “pointer to nothing” as intended. Any type of pointer can be assigned nullptr.The C++ template system is amazing, but it has to be able to create an actual legal C++ function or class with actual types and variables to compile. A template is not generic, it synthesizes a specific function with all the template parameters filled-out and then compiles that, from the template recipe and the parameters passed in at compile-time. It cannot ‘figure out’ at run time if the parameters are correct; it will probably catch any ambiguities though. Templates are confusing for beginners because they can not see the actual code produced by them, but eventually they get the idea that the template code is not what is being run, the actual code created by the template is run.#include template T add(T a, T b) { return a + b; } void f() { int i = add(5, 6); std::string x("kitty"), y("doggy"); std::string c = add(x, y); } generates:template int add(int a, int b) { return a + b; } // std::basic_string is what std::string really is template > std::basic_string add(std::basic_string a, std::basic_string b) { return a + b; } template T add(T a, T b) { return a + b; } ; void f() { int i = add(5, 6); std::string x("kitty"), y("doggy"); std::string c = add(x, y); }

The Mobius 2018 conference held in Saint Petersburg earlier this year featured a talk by the guys from Revolut – Roman Yatsina and Ivan Vazhnov, called Multiplatform architecture with Kotlin for iOS and Android.After watching the live talk, I wanted to try out how Kotlin/Native handles multiplatform code that can be used on both iOS and Android. I decided to rewrite the demo project from the talk a little bit so it could load the list of user’s public repositories from GitHub with all the branches to each repository.Project structuremultiplatform ├─ android ├─ common ├─ ios ├─ platform-android └─ platform-ios Common modulecommon is the shared module that only contains Kotlin with no platform-specific dependencies. It can also contain interfaces and class/function declarations without implementations relying on a certain platform. Such declarations allow using the platform-dependent code in the common module.In my project, this module encompasses the business logic of the app – data models, presenters, interactors, UIs for GitHub access with no implementations.Some examples of the classesUIs for GitHub access:expect class ReposRepository { suspend fun getRepositories(): List suspend fun getBranches(repo: GithubRepo): List } Take a look at the expect keyword. It is a part of the expected and actual declarations. The common module can declare the expected declaration that has the actual realization in the platform modules. By the expect keyword we can also understand that the project uses coroutines which we’ll talk about later.Interactor:class ReposInteractor( private val repository: ReposRepository, private val context: CoroutineContext ) { suspend fun getRepos(): List { return async(context) { repository.getRepositories() } .await() .map { repo -> repo to async(context) { repository.getBranches(repo) } } .map { (repo, task) -> repo.branches = task.await() repo } } } The interactor contains the logic of asynchronous operations interactions. First, it loads the list of repositories with the help of getRepositories() and then, for each repository it loads the list of branches getBranches(repo). The async/await mechanism is used to build the chain of asynchronous calls.ReposView interface for UI:interface ReposView: BaseView { fun showRepoList(repoList: List) fun showLoading(loading: Boolean) fun showError(errorMessage: String) } The presenterThe logic of UI usage is specified equally for both the platforms.class ReposPresenter( private val uiContext: CoroutineContext, private val interactor: ReposInteractor ) : BasePresenter() { override fun onViewAttached() { super.onViewAttached() refresh() } fun refresh() { launch(uiContext) { view?.showLoading(true) try { val repoList = interactor.getRepos() view?.showRepoList(repoList) } catch (e: Throwable) { view?.showError(e.message ?: "Can't load repositories") } view?.showLoading(false) } } } What else could be included in the common moduleAmong all the rest, the JSON parsing logic could be included into the common module. Most of the projects contain this logic in a complicated form. Implementing it in the common module could guarantee similar treatment of the server incoming data for iOS and Android.Unfortunately, in the kotlinx.serialization serialization library the support of Kotlin/Native is not yet implemented.A possible solution could be writing your own or porting one of the simpler Java-based libraries for Kotlin. Without using reflections or any other third-party dependencies. However, this type of work goes beyond just a test project ‍♂️Platform modulesThe platform-android and platform-ios platform modules contain both the platform-dependent implementation of UIs and classes declared in the common module, and any other platform-specific code. Those modules are also written with Kotlin.Let’s look at the ReposRepository class implementation declared in the common module.platform-androidactual class ReposRepository( private val baseUrl: String, private val userName: String ) { private val api: GithubApi by lazy { Retrofit.Builder() .addConverterFactory(GsonConverterFactory.create()) .addCallAdapterFactory(CoroutineCallAdapterFactory()) .baseUrl(baseUrl) .build() .create(GithubApi::class.java) } actual suspend fun getRepositories() = api.getRepositories(userName) .await() .map { apiRepo -> apiRepo.toGithubRepo() } actual suspend fun getBranches(repo: GithubRepo) = api.getBranches(userName, repo.name) .await() .map { apiBranch -> apiBranch.toGithubBranch() } } In the Android implementation, we use the Retrofit library with an adaptor converting the calls into a coroutine-compatible format. Note the actual keyword we’ve mentioned above.platform-iosactual open class ReposRepository { actual suspend fun getRepositories(): List { return suspendCoroutineOrReturn { continuation -> getRepositories(continuation) COROUTINE_SUSPENDED } } actual suspend fun getBranches(repo: GithubRepo): List { return suspendCoroutineOrReturn { continuation -> getBranches(repo, continuation) COROUTINE_SUSPENDED } } open fun getRepositories(callback: Continuation>) { throw NotImplementedError("iOS project should implement this") } open fun getBranches(repo: GithubRepo, callback: Continuation>) { throw NotImplementedError("iOS project should implement this") } } You can see the actual implementation of the ReposRepository class for iOS in the platform module does not contain the specific implementation of server interactions. Instead of this, the suspendCoroutineOrReturn code is called from the standard Kotlin library and allows us to interrupt the execution and get the continuation callback which has to be called upon the completion of the background process. This callback is then passed to the function which will be re-specified in the Xcode project where all the server interaction will be implemented (in Swift or Objective-C). The COROUTINE_SUSPENDED value signifies the suspended state and the result will not be returned immediately.iOS appThe following is an Xcode project that uses the platform-ios module as a generic Objective-C framework.To assemble platform-ios into a framework, use the konan Gradle plugin. Its settings are in the platform-ios/build.gradle file:apply plugin: 'konan' konanArtifacts { framework('KMulti', targets: ['iphone_sim']) { ... KMulti is a prefix for the framework. All the Kotlin classes from the common and platform-iosmodules in the Xcode project will have this prefix.After the following command,./gradlew :platform-ios:compileKonanKMultiIphone_sim the framework can be found under:/kotlin_multiplatform/platform-ios/build/konan/bin/ios_x64 It has to be added to the Xcode project.This is how a specific implementation of the ReposRepository class looks like. The interaction with a server is done by means of the Alamofire library.class ReposRepository: KMultiReposRepository { ... override func getRepositories(callback: KMultiStdlibContinuation) { let url = baseUrl.appendingPathComponent("users/\(githubUser)/repos") Alamofire.request(url) .responseJSON { response in if let result = self.reposParser.parse(response: response) { callback.resume(value: result) } else { callback.resumeWithException(exception: KMultiStdlibThrowable(message: "Can't parse github repositories")) } } } override func getBranches(repo: KMultiGithubRepo, callback: KMultiStdlibContinuation) { let url = baseUrl.appendingPathComponent("repos/\(githubUser)/\(repo.name)/branches") Alamofire.request(url) .responseJSON { response in if let result = self.branchesParser.parse(response: response) { callback.resume(value: result) } else { callback.resumeWithException(exception: KMultiStdlibThrowable(message: "Can't parse github branches")) } } } } Android appWith an Android project it is all fairly simple. We use a conventional app with a dependency on the platform-android module.dependencies { implementation project(':platform-android') Essentially, it consists of one ReposActivity which implements the ReposView interface.override fun showRepoList(repoList: List) { adapter.items = repoList adapter.notifyDataSetChanged() } override fun showLoading(loading: Boolean) { loadingProgress.visibility = if (loading) VISIBLE else GONE } override fun showError(errorMessage: String) { Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show() } Coroutines, apples, and magicSpeaking of coroutines and magic, in fact, at the moment coroutines are not yet supported by Kotlin/Native. The work in this direction is ongoing. So how on Earth do we use the async/awaitcoroutines and functions in the common module? Let alone in the platform module for iOS.As a matter of fact, the async and launch expect functions, as well as the Deferred class, are specified in the common module. These signatures are copied from kotlinx.coroutines.import kotlin.coroutines.experimental.Continuation import kotlin.coroutines.experimental.CoroutineContext expect fun async(context: CoroutineContext, block: suspend () -> T): Deferred expect fun launch(context: CoroutineContext, block: suspend () -> T) expect suspend fun withContext(context: CoroutineContext, block: suspend () -> T): T expect class Deferred { suspend fun await(): T } Android coroutinesIn the platform-android platform module, declarations are mapped into their implementations from kotlinx.coroutines:actual fun async(context: CoroutineContext, block: suspend () -> T): Deferred { return Deferred(async { kotlinx.coroutines.experimental.withContext(context, block = block) }) } iOS coroutinesWith iOS things are a little more complicated. As mentioned above, we pass the continuation(KMultiStdlibContinuation) callback to the functions that have to work asynchronously. Upon the completion of the work, the appropriate resume or resumeWithExceptionmethod will be requested from the callback: override func getBranches(repo: KMultiGithubRepo, callback: KMultiStdlibContinuation) { let url = baseUrl.appendingPathComponent("repos/\(githubUser)/\(repo.name)/branches") Alamofire.request(url) .responseJSON { response in if let result = self.branchesParser.parse(response: response) { callback.resume(value: result) } else { callback.resumeWithException(exception: KMultiStdlibThrowable(message: "Can't parse github branches")) } } } In order for the result to return from the suspend function, we need to implement the ContinuationInterceptor interface. This interface is responsible for how the callback is being processed, specifically which thread the result (if any) will be returned in. For this, the interceptContinuation function is used.abstract class ContinuationDispatcher : AbstractCoroutineContextElement(ContinuationInterceptor), ContinuationInterceptor { override fun interceptContinuation(continuation: Continuation): Continuation { return DispatchedContinuation(this, continuation) } abstract fun dispatchResume(value: T, continuation: Continuation): Boolean abstract fun dispatchResumeWithException(exception: Throwable, continuation: Continuation<*>): Boolean } internal class DispatchedContinuation( private val dispatcher: ContinuationDispatcher, private val continuation: Continuation ) : Continuation { override val context: CoroutineContext = continuation.context override fun resume(value: T) { if (dispatcher.dispatchResume(value, continuation).not()) { continuation.resume(value) } } override fun resumeWithException(exception: Throwable) { if (dispatcher.dispatchResumeWithException(exception, continuation).not()) { continuation.resumeWithException(exception) } } } In ContinuationDispatcher there are abstract methods implementation of which will depend on the thread where the executions will be happening.Implementation for UI threadsimport platform.darwin.* class MainQueueDispatcher : ContinuationDispatcher() { override fun dispatchResume(value: T, continuation: Continuation): Boolean { dispatch_async(dispatch_get_main_queue()) { continuation.resume(value) } return true } override fun dispatchResumeWithException(exception: Throwable, continuation: Continuation<*>): Boolean { dispatch_async(dispatch_get_main_queue()) { continuation.resumeWithException(exception) } return true } } Implementation for background threadsimport konan.worker.* class DataObject(val value: T, val continuation: Continuation) class ErrorObject(val exception: Throwable, val continuation: Continuation) class AsyncDispatcher : ContinuationDispatcher() { val worker = startWorker() override fun dispatchResume(value: T, continuation: Continuation): Boolean { worker.schedule(TransferMode.UNCHECKED, {DataObject(value, continuation)}) { it.continuation.resume(it.value) } return true } override fun dispatchResumeWithException(exception: Throwable, continuation: Continuation<*>): Boolean { worker.schedule(TransferMode.UNCHECKED, {ErrorObjeвыct(exception, continuation)}) { it.continuation.resumeWithException(it.exception) } return false } } Now we can use the asynchronous manager in the interactor:let interactor = KMultiReposInteractor( repository: repository, context: KMultiAsyncDispatcher() ) And the main thread manager in the presenter:let presenter = KMultiReposPresenter( uiContext: KMultiMainQueueDispatcher(), interactor: interactor ) Key takeawaysThe pros:The developers implemented a rather complicated (asynchronous) business logic and common module data depiction logic.You can develop native apps using native libraries and instruments (Android Studio, Xcode). All of the native platforms’ capabilities are available through Kotlin/Native.It goddamn works!The cons:All the Kotlin/Native solutions in the project are yet in the experimental status. Using features like this in the production code is not a good idea.No support for coroutines for Kotlin/Native out of the box. Hopefully, this issue will be solved in the near future. This would allow developers to signNowly speed up the process of multiplatform projects creation while also simplifying it.An iOS project will only work on the arm64 devices (models starting from iPhone 5S).

There are lots of cross-platform development tools which will more-or-less let you write a single program which runs on both platforms.But if you haven’t written programs for Android and iOS before, there is a substantial learning curve. The language is the least of your problems. The language sits in some “framework” which provides functionality like drawing buttons and navigating pages, and these are complex. And you still need to know a fair bit about Android and iOS.The two most popular cross development tools are React Native and Xamarin. React Native code is written in Javascript using the React framework. Xamarin code is written in C# and has its own framework.If you are new to programming, don’t start with iOS and Android cross platform development tools.

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Use them however you want.FREE TYPOGRAPHYTypeGenius: Find the perfect font combo for your next project.Font Squirrel: 100% free commercial fonts.FontFaceNinja: Browser extension to find the web fonts a site uses.Google Fonts: Free, open-source fonts optimized for the web.Beautiful Web Type: Best typefaces from the Google web fonts directory.DaFont: Archive of freely downloadable fonts.1001 Free Fonts: A huge selection of free fonts.FontPark: The web’s largest archive of free fonts.Font-to-width: Fit pieces of text snugly within their containers.signNow Edge Fonts: The free, easy way to get started with web fonts.Typekit: A limited collection of fonts to use on a website or in applications.FREE ICONSFontello: Icon fonts generator.Flat Icon: A search engine for 16000+ glyph vector icons.Material Design Icons: 750 Free open-source glyphs by Google.Font Awesome: The iconic font and CSS toolkit.Glyphsearch: Search for icons from other icon databases.MakeAppIcon: Generate App Icons of all sizes with a click.Endless Icons: Free flat icons and creative stuff.Ico Moon: 4000+ free vector icons, icon generator.The Noun Project: Thousands of glyph icons from different artists.Perfect Icons: A social icon creation tool.Icon Finder: Free icon section of the website.Free Round Icons: Doodle Set | Flat Set | Vector Line SetIcon Sweets: 60 free vector Photoshop icons.Make Appicon: Generate App Icons of ALL sizes with a click.App Icon Template: Royalty free app icon creator for iOS, OS X and Android.SmartIcons: Download 1450 premium icons for free.Ego Icons: 100 Free vector icons with a clean look and feel.FlatIcons: Free flat icon customizer, royalty free.To(icon): Free icons.FREE USEFUL STUFFUI Names: Generate random names for use in designs and mockups.UI Faces: Find and generate sample avatars for user interfaces.Copy Paste Character: Click to copy.Window Resizer: See how it looks on various screen resolutions.Sonics: Free packs of UI sounds and sound effects delivered to your inbox every month.FREE DEVELOP / CODE THINGSHive: First free unlimited cloud service in the world.GitHub: Build software better, together.BitBucket: Git and Mercurial code management for teamsChisel: Chisel offers an unlimited number of fossil repositories.Visual Studio: Comprehensive collection of developer tools and services.Landscape: Landscape is an early warning system for your Python codebase.Swiftype: Add great search to any website. Free with limitations.Keen.io: Gather all the data you want & start getting the answers you need.Coveralls: Test coverage history and statistics.LingoHub: Free for Small Teams, Open Source usage and Educational projects.Codacy: Continuous Static Analysis designed to complement your unit tests.Searchcode: Search over 20 billion lines of code.TinyCert: Free SSL certificates for your startup.StartSSL: Free SSL certificates.Opbeat: The first ops platform for developers. Free for small teams.Pingdom: Website monitoring. Free for one website.Rollbar: Full-stack error monitoring for all apps in any language.Loggly: Simplify Log Management Forever. Free for one user.Devport: Get your developer portfolio.Getting Real: The smarter way to build web apps. A free book by 37signals.Peek: Get a free, 5-minute video of someone using your site.Creator: Build better Ionic apps, faster.DevFreeCasts: A huge collection of free screencasts for developers.Cody: A free library of HTML, CSS, JS nuggets.ProductivityBACKGROUND SOUND TO FOCUSNoisli: Background noise & color generator.Noizio: Ambient sound equalizer for relax or productivity.Defonic: Combine the sounds of the world into a melody.Designers.mx: Curated playlists by designers, for designers.Coffitivity: Stream the sounds of a coffee shop at work.Octave: A free library of UI sounds, handmade for iOS.Free Sound: Huge database of free audio snippets, samples, + recordings.Sonics: Free packs of UI sounds and sound effects delivered to your inbox every month.Deep Focus: Spotify’s famous playlist to focus.AVOID DISTRACTIONSelf Control: Mac: free application to help you avoid distracting websites.Cold Turkey: Windows: temporarily block yourself off of distracting websites.ORGANIZE & COLLABORATETrello: Keeps track of everything.Evernote: The workspace for your life’s work.Dropbox: Free space up to 2GB.Yanado: Tasks management inside Gmail.Wetransfer: Free transfer up to 2GB.Drp.io: Free, fast, private and easy image and file hosting.Pocket: View later, put it in Pocket.Raindrop: Mac app for bookmarking and reading it later.Flowdock: Free for teams of five and non-profits.Typetalk: Share and discuss ideas with your team through instant messaging.Slack: Free for unlimited users with few limited features.HipChat: Free for unlimited users with few limited features.Google Hangouts: Bring conversations to life with photos, emoji and group video calls.Voveet: Simple, free 3D conference calls. Experience the difference.FreeBusy: Eliminate coordination headaches when you need to schedule a meeting.RealTimeBoard: Your regular whiteboard, re-thought for the best online experience.Witkit: Witkit is the secure platform for teams. 50GB of free encrypted data storage.Any.do: Get things done with your team.Asana: Teamwork without email.GoToMeeting: Online meetings without the hassle.DIGITAL NOMADS & REMOTE WORKINGFounded X Startup Stats: Find the best country to build your startup inTeleport: Startup Cities: Discover and budget your next move to 100+ startup cities.Nomad House: Houses around the world for nomads to live and work together.Workfrom: Coffee, WiFi and good vibes.Lastroom: Simplifying your team travel managementNomadlist: The best cities to live and work remotely.What’s It Like: Helping travelers figure out WHEN to go.Nomad Jobs: The best remote jobs at the best startups.LearnDISCOVER TOOLS & STARTUPSProduct Hunt: Curation of the best new products, every day.Angellist: Where the world meets startups.Beta List: Discover and get early access to tomorrow’s startups.StartupLi.st: Find. Follow. Recommend startups.Startups List: Collections of the best startups in different places.Erli Bird: Where great new products are born.BUILD TOGETHERAssembly: Co-create new ideas no matter where they are.CoFoundersLab: Find a co-founder in any city, any industry.Founder2be: Find a co-founder for your startup.LEARNCoursera: Free online classes from 80+ top universities & organizations.Khan Academy: Free, world-class education for anyone, anywhere.Skillshare: Unlock your creativity with free online classes & projects.Codecademy: Learn to code interactively, for free.How to start a startup: As an Audio Podcast or As Online CourseStartup Notes: Startup School invites amazing founders to tell their story.The How: Learn from entrepreneurs.Make This Year: Guide to help you launch your online business.Closed Club: Browse shut-down start-ups & learn why they closed down.Startup Talks: A curated collection of startup related videos.Rocketship.fm: Learn from successful entrepreneurs each week.reSRC.io: All free programming learning resources.The Lean LaunchPad: How to Build a Startup.TalentBuddy: Learn to code.Mixergy: Learn from proven entrepreneurs.Hackdesign: Receive a design lesson in your inbox each week.NEWSLETTERS THAT DON’T SUCKEmail1K: A free 30 day course to double your email list.Design for Hackers: 12 weeks of design learning, right in your inbox.Startup Digest: Personalized newsletter for all things startup in your area.Mattermark Daily: Curated newsletter from investors & founders.ChargeWhatYou’reWorth: Free course on charging what you’re worth.Product Psychology: Lessons on User Behavior.UX Newsletter: Tales of researching, designing, and building.UX Design Weekly: Best user experience design links every week.USEFULFoundrs: Co-founder equity calculator.HowMuchToMakeAnApp: Calculate the cost of a mobile application.App vs. Website: Should you build an app or website?Pitcherific: Pitcherific helps you create, train, and improve your pitch.Startup Equity Calculator: Figure out how much equity to grant new hires in seconds.Ad Spend Calculator: Should my startup pay to advertise?

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