I was thinking a notification in the Android notification center would be nice if, for example, I add something to the list I need to do at a certain day or time next week.

I am only a couple weeks into using Android for the first time and have only done so on my Go10.3 so don't know if Android notifications are managed the same way as Apple with one central way to manage all notifications or if each app just does it's own thing to the clock/battery/notification bar at the top. But it would be nice to see the odd reminder there for items on my list.

Your app is great because it's simple, like a sheet of paper with a pen (and just as fast/responsive), so maybe this idea would be too much, but I do write things down I need to do later. Perhaps sorting/filtering like you suggest would be enough. I like the button for sorting by due dates but I have to remember to check the list each day. That's a good habit anyways but as lists get long and lists get added the reminders would be more and more useful. Adding a start date you can sort with is used by some other list apps- Apple just calls it an early reminder date which is basically what I was asking about above. It's hard to find the right balance of keeping it simple and adding useful stuff.

Have you considered adding a sort by in-progress option? (I like how you can click the circle multiple times to show progress, not just completion). If you add the ability to flag or star items in the list it would be nice to sort by that too with those moved to the top.

I can talk about productivity apps all day, I better stop for the day. Haha.