Update docs

DEV.md

@@ -12,7 +12,7 @@ make -j8
 Wasm3 is continuously tested with Clang, GCC, MSVC compilers, and on multiple platforms.
 It can be easily integarted into any build system, as shown in `platforms`.
 
-## Build on Linux
+## Build on Linux, OS X
 
 ### Clang
 

README.md

@@ -1,4 +1,4 @@
-<img align="right" width="30%" src="/extra/screenshot.png">
+<img align="right" width="30%" src="/extra/screenshot-android.png">
 
 # <img src="/extra/wasm-symbol.svg" width="32" height="32" /> Wasm3
 

platforms/android/README.md

@@ -1,5 +1,8 @@
 ## Build for Android
 
+<p align="center"><img width="50%" src="https://github.com/wasm3/wasm3/raw/master/extra/screenshot-android.png"></p>
+
+
 Install Android SDK Tools, then:
 
 ```sh

platforms/ios/README.md

@@ -0,0 +1,15 @@
+## Build for iOS
+
+<p align="center"><img width="50%" src="https://github.com/wasm3/wasm3/raw/master/extra/screenshot-ios.png"></p>
+
+
+Install Xcode, then open and build the project as usual.
+
+**Note:** Xcode runs apps in `Debug` mode by default. Select `Release` mode for signignificantly better performance.
+
+You can also build the project from command line:
+
+```sh
+xcodebuild build -scheme wasm3 -project wasm3.xcodeproj -configuration Release -destination 'platform=iOS Simulator,name=iPhone 11,OS=13.3'
+```
+