Some tips
First off, expect lots of lagging and crashing in this game, but here are some helpful tips based on my experiences.
Once you are inside your kingdom it is pretty stable, but leaving it to go visit other kingdoms will lead to crashing at some point. So if you are tending your garden, leave the app on and stay inside your kingdom.
If you are inside your kingdom and it you get the "server too busy" error or something like that, you can hit OK and ignore it. You will stay connected. But if you get this message when you are outside your kingdom, then you must reboot.
One exception that sometimes works is when you are outside your kingdom and you get a connection failure message, you can go into the plus+ section then return to the kingdoms and you will be refreshed without needing to reboot. About 30% success rate.
Bottom line: you will most likely crash when you go kingdom hopping, and least likely to crash if you stay in your kingdom.
Hope this was helpful, if so, come visit one of my 120 shops, most are always open.
Plus+: BaldOne