inglor/Anki-Android — comment on commit 3122468026c6997efaeb7a7f673fd9ab07f890cd
File:  line 0
By nicolas-raoul:

"Select the lowest platform with which your application is compatible" > Actually we do classloading tricks so that new phones can benefit from new features, and those new features are not loaded on old phones.
So you can safely put target=android-15 and it will still work on 1.5