The app crashes when I click on one of those 4 lower buttons (iPhone Xr), but I don’t think their functional is so important. That’s more – super-light app ~3 MB is so good for me! (For human with constantly clogged storage, yep). I use it when I need to know time with seconds, and that’s not so pleasure to make a note every time, and I haven’t light app for that, so, what’s about adding separated clocks to, for example, “settings” window? They’ll be seem good for design there, I guess. And will be very good for functionality. By the way, did you know, that iPhone XR is written as “iPhone Xr” at Settings’ “about” list?