Sifa quickly became one of my favourite atproto-based apps, because it really makes a lot of sense to provide a professional ID on an open protocol where everything is public. The fact that it (optionally) populates my sifa profile with my activity on other atproto apps I use (such as when blogging on offprint) is sooo cool. I really hope it takes over LinkedIn one day.

I play mathr whenever I'm idle, in a doctor waiting room, at the hairdresser... Sometimes just a few calculous, sometimes a whole level, it does not matter. Playing mathr really improved my calculous skills!