[johnnyanmac]

Anyone determined enough can break into any house. If not through ingenuitiy, then by a brick to your window. Doesn't mean we shouldn't lock our doors, turn off our lights, and close our curtains anyway.

The fortunate thing is that 99% of people won't bother trying to break your app if it's not dead simple. Advanved security mechanisms to check for backdoors is probably something only billionaire tech companies need to worry about.

[Hizonner]

You totally misunderstand the threat model. It's not about anybody breaking your app. It's about people making their own apps do things they're not supposed to do.

... and there's always a tradeoff in terms of how much of a deterrent anything is. The app store checks are barely measurable.

[johnnyanmac]

The app store checks are barely measureable, yes. Hence why being open source is the best check for any undocumented changes. Even if it's not discovered on FDoid, reports will come out for those who dig. Much easier to view source code than decompiling an APK to analyze.

But at some point there needs to be some level of trust in anything you install. You can't rely on institutions to make sure everything is squeaky clean. They can't even do that on content platforms (or at least, they choose not to afford it).