I'm have using this app a long time, but since July it is causing me problems.
After the 5.3.3 update I could not reboot my phone anymore, because it would get stuck in a bootloop. Luckily the phone is rooted and I had a backup available. I decided to wait for the 5.4 update because that seemed to bring some architecture changes (since it now requires Android 4.1).
I installed 5.4 and at that moment the device immediately rebooted, even before I started the app. I went into a bootloop again.
The device is a Redmi Note 3 running Cyanogenmod 13.0.
I am not the only one on this matter, I saw at least one review on Google Play complaining about bootloops shortly after the release of 5.3.3.