Sure, there are some paid and some free. You can’t do everything you can do in the official app, specifically you can’t do the admin functions like add a device, so you would still have to use it occasionally. But as far as everyday turning on a light, checking the status of devices, etc. these “dashboard“ options work well and are very popular.
See the recent discussion thread. Although the person is asking about a wall panel, the same apps will work on a phone since they are browser-based and you can customize the tiles. 
FAQ: Sharptools , actiontiles or native ST app for your wall panel? (2020)