I also created my own personal CRM (https://contactcache.com), but my main take was privacy. I believe that the information stored about our business partners or loved ones are really sensitive and therefore I opted for 100 % end-to-end encrypted notes.

I am not working on the app now as I haven't figured out how to make money on it yet. However I will leave this idea here because I think that you guys should consider offering end-to-end encrypted notes (even just as an option for some selected notes).