I've been trying Realm for Xamarin recently and I've got to say I'm pretty disappointed with it, compared to my previous experiences with EF.

My complaints are as follows:

- No enum support

- No inheritance support

- Many LINQ operations aren't implemented, no select, no aggregate, etc. I have to do a ToList or ToArray to use these operations.

And that was just what came up in the first day of usage...

Why would I use Realm if EF7 gets SQLite Code First+Xamarin support and can do all of these things? Sure, it's faster, but faster doesn't matter if I'm not speed critical on my DB (most mobile apps aren't) and I can write cleaner code. It might be better than manually writing SQL queries, but it's a lot worse than existing ORM solutions.