The advantage of android is that you dont need to rely on the appstore.
Just use your favourite search webengine and type in qi4a
There are always sites which upload the apk files of apps. The last update on the app was 4 years ago, but i dont know the most recent version.
Anyway i found several links to apk with just a quicksearch.
<Samual> I am the most unprofessional developer ever
<bluez> halogene, you make awesome music, but you have no clue about ctf.
<Halogene> I didn't know mappers include some mysterious waypoints so members of the BOT clan can navigate a map?
<divVerent> if you don't pay for a premium account, your movement speed is limited to 100qu/s