When I choose "push sync" in my Android app, sometimes it won't work, because I'm not connected to Wi-Fi or because I am connected but I forgot to accept some conditions in some landing screen.

Then, if I change something in the web app, my Android app stays unsynchronized until I connect to the internet and then either manually sync it or make a modification in either the web app or the Android app to have it synchronize.

My suggestion is to add a sync option that works both as a push sync, and also repeats every 5, 10, 20 minutes, etc., so that that app will be synchronized automatically in the next sync point and not just when I sync manually.