I just spent half an hour going through all of the app's settings and I am so hyped from the amount of details that went into it. Some of the things that made me realize the author put their heart and soul into it:
Custom filters; pages that show tasks satisfying a certain criteria, e.g. due date is up until tomorrow
Notification sound can be played repeatedly 5 times to catch your attention
Random reminders in case you're procrastinating
Optionally ignore fields you don't use in the task editing screen. I hid reminders (because the defaults are good enough), tags, location, priority. I appreciate it so much.
The fucking widget is customizable to death, you can hide the check boxes, hide the dividing lines between tasks, change the font size.
It's perfect, it's obviously on F-Droid, and it obviously sync with Nextcloud. The widget thing was what made me write this post. They really went out of their way to make the app satisfy everyone.
For me misses the most important feature nowadays. Encryption! Even when stored locally encryption its important in case you lost your phone or to prevent a malicious app to access the tasks app folder