Yeah I was a bit gutted when I found Stickk after spending a bunch of time building Kommit. It's super similar and I felt a bit silly for not doing the research beforehand.

However, considering Stickk has existed for something like 14 years, it doesn't feel particularly mature. I don’t want to be too disparaging (and I’m obviously biased) but I found their website quite clunky and the apps don’t receive great reviews (1.8 on IOS and 3.0 on Android).

A few aspects that I believe are better in Kommit:

  - More control over deadline schedules (you can set it to repeat on multiple specified days of the week).
  - More control over punishment rules (you can choose how many consecutive failures are allowed before you're punished).
  - You can give yourself skip days (useful if you know you’re likely to need a vacation).
  - You can update commitments (there is a mechanism to allow updates while preventing you from dodging punishments).

That being said, they do have some cool features such as donating to an "Anti-Charity" (a controversial charity that you don’t support) upon failure.