Since dedicated Android apps for editing .save files are rare, the most reliable method is to use a web-based tool:
: For non-rooted devices, apps like Hack App Data or Cheatroid can sometimes access internal game preference files (XML or databases) to modify values like health or gems. Key Locations and Technical Hurdles renpy save editor for android link
Using specialized file managers like or Solid Explorer that can sometimes bypass these restrictions. Since dedicated Android apps for editing
This is the closest thing to a dedicated editor. is a Python script that unlocks the console and developer menu in any Renpy game. renpy save editor for android link