Ask HN: Any service or app to track activities with friends

[mzfr]

So I along with my two other friends are doing a lot of stuff like doing at least 1 hackerrank problem a day, reading 30 pages of the same novel every day, etc. I wanted to know if there is any service or any app that would let users track all this stuff?

[wakatime]

There exists the perfect tool for this:

https://wakatime.com