This is a gray area. It uses SEGA’s intellectual property (Sonic, Tails, Dr. Eggman) without a license.
Offers the highest vertical mobility and air-speed bursts at the cost of ground speed. Bumper Gloves: Sonic Chrono Adventure Apk Android
Some developers in the fan community have taken the source files and wrapped them into an APK. These are unofficial "wrappers" that allow the game to run on Android. Easy to install (standard APK). This is a gray area