It looks nice. How is this similar to / different from iDoneThis? visually it seems nicer, but does it have the same email integration and daily updates? (I noticed weekly, is this configurable?)
The only reason I can see for us to NOT use it, is because we already use rollbar[1] (for tracking js errors) and rollout[2] (for feature flags). The name 'Rollcall' will create way too much confusion for us. Sounds silly, I know, but it does have an impact.
[1] https://rollbar.com/ [2] https://github.com/FetLife/rollout