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You can try https://github.com/groue/GRDB.swift

It's a thin wrapper around SQLite, with convenience APIs for record types, robust support for concurrency, and a focus on GUI apps.

Any other similar tools?

GRDB is perhaps the best solution available with a very good API. Simple to start using and all the power of SQL easily accessible if needed.

Have a look at FMDB: https://github.com/ccgus/fmdb/

I don't know or use it personally. But the developer behind it is very experienced and sells the nice, tried and true image editor Acorn here. https://flyingmeat.com

I used FMDB in a number of iOS apps (although it's been quite a few years back) and it was a pleasure to use. It was simple, well-designed, and with no surprises.

We had much more success with Realm: https://docs.mongodb.com/realm/ios

In terms of usability it was lightyears ahead of Core Data, and it actually worked smoothly with multi-threaded apps without breaking down constantly (as had been our experience with Core Data). It was a joy to work with.

https://dflat.io/

Very different trade-offs. Focusing on separating mutations out and provide change subscription mechanism to facilitate one-way data flow UI design.