Riff is an iPhone calendar where you can zoom smoothly from half a year to a single day, and every stop on the way is a working calendar. You create, edit, and reschedule with your other events in view. As with a paper planner, you find a free spot and type only what you need.
This is an idea I had for several years, but only now, with AI-assisted development, has it become feasible. Still, it took four months and 1,400 commits trying different concepts and, in the end, fine-tuning the feel and usability. I have since learned that the idea isn't quite novel, but I believe the execution is.
It works directly on the calendars already on your phone. There is no account, no server, and no analytics. It is free for three weeks with nothing to sign up for, then $39.99 once, or a subscription at $1.99 a month or $19.99 a year. I hope it will get some traction, but even if it doesn't, I will continue to maintain it as I wouldn't want to be without it.
Even if you don't install it, the homepage has a screen recording. I would love to hear how the zoom feels and what would make Riff your calendar.