First, install tbc following its instructions.

Both platforms

• After starting tbc <config>, wait 5-15 seconds for system assemblies to load from the app before attempting a hot reload. You'll see lots of activity in the terminal when they're arriving to the host.
• Your projects must have shared Mono runtime and fast assembly deployment enabled.
• Use different ports for different platforms.
• If it refuses to work for some reason, close the solution, delete bin/ and obj/ directories, rebuild-restart the app, and then run tbc again.

iOS

Very close to the sample you can find in tbc repository.

1. Build and run your app in Debug mode on the iOS simulator.
2. Run tbc ./reload-ios.json from the solution's root (for some reason it does not work from the project's root).
3. Wait for assemblies to load.
4. That's it, you can edit your view controllers' content directly.

This sample's ReloadManager only reloads changes in UIViewController subclasses. So if you want to edit custom subviews, either edit something in the controller first or make tbc watch the directory recursively (see its Readme). In real-life apps, you may want to only reload the currently showing tab/screen because it's more straightforward.

Android

I've managed to get tbc running on Android but, unfortunately, it comes with some significant limitations because you can't reload native types (everything derived from Java classes). JNI registers all types at compile time and then refuses to accept new ones.

So, the only way is to use plain C# classes for any UI-related work. Android native View becomes just a shell, while there are at least three separate classes: one for creating child views (can be static), one for layouting them (also can be static), and one for holding references to the created views (this can be done in the parent view, but then you won't be able to add new UI elements on the fly).

1. Launch Android emulator.
2. Run adb forward tcp:50125 tcp:50125 in the terminal.
3. Run Debug build of your app in emulator.
4. Run tbc ./reload-droid.json.
5. Wait for assemblies, it takes longer than on iOS.
6. Proceed with hot reloading regular or static component, but do not edit ReloadableView directly (it's not so reloadable, after all).

Watch out: reloadable parts must be stored in a subdirectory because tbc recompiles entire directory, so all native views should be isolated outside of it.