Most of the maintenance involves making small changes that can be done even on a phone. E.g., if app is crashing because there is a piece of code which isn't do

Most of the maintenance involves making small changes that can be done even on a phone. E.g., if app is crashing because there is a piece of code which isn't doing array bounds checking, you can add that code quickly and push changes. Another example is small changes like fixing typos or changing labels.