Many congratulations, it looks like a solid application. My only concern is that it seems (at least from what I see on the Play Store) that the apps do not receive constant updates or are missing some essential features. For example, in the case of Noting, the last update reported on the Play Store was on August 5th of this year, and the synchronization feature has still not arrived.
My concern as a user when buying applications is that they may not have future support. I strongly believe in buying a product for what it is at the time of launch, not for what it promises to become in the future, but in the case of smartphone apps that are constantly updated, I think ongoing support is essential.
Your concepts are very beautiful, and I sincerely congratulate you on them, but as a user, my humble opinion is that the effort might be better spent focusing on the applications you have already released; perhaps it would be worth having two or three solid applications rather than several apps that do not receive what users perceive as adequate support.
I know nothing about software development and I greatly admire your work; this is simply a friendly opinion, and I hope I am not being disrespectful.
