My point exactly, something I could control easily and not a single action.
Diet and exercise normally isnt done to fix issues but to dilute them. You can only ever do so much. People cannot know all, next best they offer a gentle suggestion and just know they wish you longer health.
Then again diabetes and the complications thereof do not seem like chronic conditions to you.
Android apps are specifically using google ecosystems and would break without such things. It would also mean taking a developers app and putting it in a new market, this requires permissions and they might be under contract.
Linux can run android apps, but having a fully commercial device would need lots of new natives.