[koyote]

I recently made a tiny utlity app with a single screen, one dropdown and a few lines of text (it makes a single API call to populate the text).

According to my phone it's 25MB.

There's no assets, not even an app icon.

I have no idea what would be taking up more than a few hundred kb, let alone 25MB.

[Tox46]

There are ways to analyze the content of your app so you know exactly what's taking all the space.

Tools can vary depending on what language you used. For example i wrote a small app using flutter and i used the flutter's app size tool.

[abareplace]

Is it for iOS? Then, it could be the Swift runtime library.

[marcosdumay]

Maybe your compiler isn't pruning dead code?

[saidinesh5]

I think it could be all the compat /support libraries that try to give you the same API across different Android versions.