What are some alternatives?
When comparing Stetho and Chrome Mobile DevTools, you can also consider the following products
Bugsee - See video, network & logs leading up to bugs or crashes
Xcode - Xcode 4 is the new version of Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
GapDebug - GapDebug is a comprehensive mobile debugging tool that bridges the gap left by other debugging options.
Genymotion - This is an Android emulator for your computer.
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
SimPholders - A small utility for fast access to your iPhone simulator apps.