tl;dr: Around one quarter. Currently I am not focused on that, I first want to reach more people. Until recently, the support period would auto-renew. Many peo

tl;dr: Around one quarter. Currently I am not focused on that, I first want to reach more people. Until recently, the support period would auto-renew. Many people would forget about it and ask for a refund, so I decided to make it more user-friendly and make the support renewal "on demand". I am adding the update/renewal prompt in the app soon, we'll see how it goes. As for the current number, it depends on whether the people are still using the product, most of them are. I would say around a quarter or less renew currently. Also, now, the support/updates is not exactly strictly enforced (I sometimes respond to support queries for people without a valid support period), but I am working on integrating a ticketing system that would require a valid support period, which should give more reasons to customers to renew.