Three Steps Ahead

This is an Android App which simulates your location. Its goal is to simulate the whole bunch of GPS/GNSS and sensor data realistically.

Download

Grab the most recent release from Github's Release page.

Follow install instructions below!

Features

• simulate latitude, longitude, bearing, speed
• calculate GPS satellite positions for simulated location
• use altitude (this is not ideal), accuracy, TTF, location update timings from real GPS receiver
• add noise to appear more realistic
• choose coarse location in map, move around using joystick
• display joystick overlay above other apps
• only hook selected apps (currently a static list: SatStat for testing and PoGo)
• WIP for next release: modify (accelerometer, gyroscope, magnetometer, etc.) sensor data to match simulated movement

Screenshots

The main app is currently just a location picker which also starts the joystick overlay service.

On the map you can pick your start location. From there you can go to other apps and move around with the joystick.

Simulate Location in other Apps

Here are screenshots from SatStat with faked location and the joystick overlay, which lets you move around in the map.

The joystick's horizontal axis determines your angular velocity (default: up to 45 °/s). The vertical axis determines your translational velocity (default: up to 4.2 m/s). Speed and bearing are simulated according to your joystick.

Build

• Simply build it with Android Studio
• For com.android.support:appcompat-v7 in Android Studio go to: Tools >> Android >> SDK Manager and select and install "Extras|Android Support Repository" (Details)

Install

• Install Xposed Framework
• Install ThreeStepsAhead
• Activate it in Xposed settings
• (Soft) Reboot
• start ThreeStepsAhead and pick a location before starting PoGo

Some hints:

• we rely on a real GPS fix to get realistic accuracy, altitude, and timings.
• GPS only location mode recommended
• disable fused location provider in case of problems
• make sure to disable Mock Locations

Compatibility

• Android 4.4+, tested with 4.4 - 6.0

Permissions

• Network/State: needed for map service
• Storage: needed for map tile caching
• Draw Overlays/AlertWindow: needed to draw joystick overlay over other apps

Credits

• Xposed Framework
• Map: OSMDroid, default tiles: OpenStreetMap
• Joystick: Bugstick by justasm
• Satellite calculation: predict4java by G4DPZ
• Settings based on: UnToasted by egingell
• App icon made by Roundicons Freebies (CC-BY, background added)
• Marker icon made by freepik from www.flaticon.com
• Zoom icons from SatStat by mvglasow