Yohaku is live on the App Store today. It gives unplanned time a name, a start and an end, then lets you look back on that rhythm across Today, Week and Month.
Every core feature is free. The free version may show unobtrusive banner ads; a one-time ¥400 “Remove ads permanently” purchase removes them. It is not a subscription.
Spaces stay on your device — no account required. Requires an iPhone on iOS 17 or later, and is available in 18 languages.