First of all, I'm glad people are trying to come up with assistive technologies for ADHD. I applaud anyone who actually makes something and puts it out there.
That said, a lot of "ADHD apps" are todo lists and planning apps. ADHD isn't a disorder of planning, it's a disorder of doing. I can make realistic, specific, achievable plans as well as anyone else, but when it comes to doing the work it often just doesn't happen. Literally yesterday I lost a freelance client purely due to my own procrastination. I had a sensible plan and didn't follow it.
I don't want to just slam this app or other existing apps, so in an effort to be constructive here are some spaces that I think could be explored further to help people with ADHD:
* Smart speakers. I use them heavily and they are a great distraction free computing device. "Fire and forget" reminders are great. I have a smart speaker in every room and can set a reminder to do something in 30 minutes time without having to move, find a pen, pick up a phone or distract myself in any way.
* Emotional regulation. ADHD means you are on a rollercoaster of emotions that you can't regulate well. There are techniques for controlling them but when you are blinded with rage or bursting into tears you don't remember. Perhaps a device could constantly asses your emotional state and remind you of regulation techniques right when you need them.
* Anything centered around positivity and forgiveness. An app that makes past successes visible without minimizing the impact of the disorder would be great.