Due for the iPhone is excellent. It's a reminder app that nags you every five minutes until you get The Thing™ done. Before I started using it, I had a problem with forgetting reminders once they appeared. This never happens anymore and I actually manage to get some things done!
Just started with using Lunatask to help keep myself on task, and help me remember a lot of the little things I tend to forget. I’m still learning what the app is fully capable of, but it’s been super helpful to me so far.
It is an end-to-end encrypted, cross-platform, todo list, notebook, habit and mood tracker, and journaling app built with ADHD brains in mind. The creator has also expressed some willingness to open source in the future, but there is no guarantees there.
Tried many things during a long life. In fact, if you are not wedded to the Microsoft platform, than google tasks, calendar, gmail, and docs can combine to a surprisingly good and rather simple solution. But recently I fell in love with obsidian. Perhaps a bit more complicated than some others, at least initially, but also much more flexible and capable. In addition, multi platform (windows, mac, linux, android, ios) and you own your data, kept on your machine, in time proof text format, rather than on some cloud server, that eventually will hold you to ransom. With other systems I have eventually run into a crippling cul-de-sac, in obsidian there always seems to be a way out. Perhaps, it is not so good for teamwork, rather for the lonesome, hyper focussed keyboard worrier. But for them, it rocks.
I'm using habitica but honestly I hate the app and there is some drama there that may make me leave. Also I have integrated all my calendars so it is all linked to my Google calendar and shows work and personal. And Trello it's a virtual kanban board with cool integrations
I also use Trello! Been using it for a decade to track assignments for classes (at the graduate level now) and other things I need to get done - the calendar subscription is super helpful because it puts all the due dates right into my iPhone and google calendars
