Map Tools: Fake GPS & Trails (formerly Location Simulator – Mock GPS) combines two things: a developer tool for testing location-based scenarios on-device, and an activity/walk recorder that captures your real GPS track. Simulate GPS coordinates anywhere in the world without rooting your device, using Android's official Mock Location API, with 5 distinct mocking modes — from a fixed point to live joystick movement, realistic routes, and human-like wandering. Walk mode records your real track with altitude and timestamps whenever you start it; recording continues with the screen off, and you can export tracks as GPX or review them with a heatmap and elevation profile. Every recording stays on your device only. Smart Shield switches to a per-app GPS profile automatically, while a floating overlay, home-screen widget, scheduler, and Photo GPS Editor give you full control.