I've been using Working Copy [0] for quite some time and have yet to meet any limitations. It's a freemium business model (though the free version did have more than enough functionality for me until I wanted to push from my mobile device as well) but the one time $5 payment is well worth it in my opinion for how high quality of an app it is. It has some crazy features and crisp integration with the iOS workflow, I'd highly recommend it.

0. https://workingcopy.app/