Hi,
As @troylyndon mentioned, the one thing to consider is that if a 3rd party service goes out of business (and it happens more than you think, and quickly) you are basically screwed in not only the lapse of data, but also rewriting your code base for whatever other tools you have to transfer to.
This is a major issue in my opinion, a shiny site does not mean it’s your bedrock.
Full disclosure; I created Coronium Cloud exactly for this reason. It may not be pretty, but its been on the dancefloor for a couple years now. It has proven its abilities.
To clear up a common misconception, Coronium is free, 100% free. You host it, you expand on it using Lua, you basically “own” it. You are the service provider. If gravity decided it no longer wanted to be my friend, and I floated off the face of the Earth, it’s still yours. Coronium is very similar in nature to a regular server stack like LAMP. It is not a service, paid or otherwise.
But, that being said, Coronium would be more than you need unless you planned on using it for other things.
My alternate suggestions would be Coronium ACE, which is a smaller, simpler, and newer version of some Coronium innards. Most specifically an API and Data storage that can also be expanded with Lua. The other is Parse.com + the new Parse plugin. Now, of course I’ve just said don’t use 3rd party, but Parse is owned by Facebook, so they probably are not going anywhere, anytime soon. The main issue I find with Parse is speed. It has slowed quite a bit since the FB acquisition.
Hope some of that helps for future viewers.
Cheers