I tried a bunch of iOS apps, but wanted no friction, no tracking, no cloud, no social, etc. so eventually built https://flathabits.com. Also wanted to own my habit data (as plain text), so I made sure Flat Habits stored its data locally as an org file.

I'm an Emacs nutter and can say the strength of a habit tracker lies in removing daily friction from the tracking process itself. The plain text part is cherry on top (bringing piece of mind around lock-in). In my case, it's been months since I looked at the plain text file itself.

As for forming habits themselves (the actual goal)... it's been well over a year since I started running. I've kept it up since reading Atomic Habits (and started tracking).

I am trying to keep tabs on electric two-wheeler startup industry in India. Ather energy is emerging as a big name. Anyone knows how they are doing?