Hey! We're Kevin and Jonathan - the creators of Polar.
Polar started in late 2018 when Kevin was hyper-focused on building a distributed cryptocurrency platform which had a very mathematically complicated technology backend.
At one point he was managing hundreds of PDFs and textbooks and was overwhelmed and realized there had to be a better way. The existing tools just did a horrible job manging this knowledge so he started building his own system for his personal use.