Hello,
Yeah I guess my app is a bit too complex for flipabit, but as far as it works… If you have advices to optimize it though, I’m taking it ! 
My app can me installed, I tried it with an other name : but it can’t be updated. I use a lot of local databases (my app is thinked to be used without internet connexion) so if I can’t update it, I will lose everything I created from my phone.
I do not use notifications push (I do not use notifications at all in fact). I’m only on android, I don’t have an iphone to try with iOS
How do you chose wich version of android you use to create the apk file ? I’m on android 13, maybe something changed and is not compatible anymore ?