Oncelet: Days Since Tracker
When was the last time?
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
When did you last change the water filter, call your parents, get a haircut? One tap records it. Oncelet counts the days since.
When was the last time?
You changed the water filter — when? Got a haircut, oiled the bike chain, called your parents, watered the fern. Oncelet keeps these things on one board and counts the days since each of them.
ONE TAP
Did it again? Tap the button. The counter flips back to zero and the entry goes into history. Tapped by mistake? Undo is right there.
A BOARD, NOT A TO-DO LIST
Nothing is overdue and nothing nags. Pin up to four trackers as large plates at the top; the rest sit in a list below. One glance tells you how long it has been.
YOUR OWN RHYTHM
Every entry is kept with its date. After a few, Oncelet shows how often it really happens: "Usually about 38 days."
REMEMBERED LATER?
Add an entry for any past day, with or without the time. Notes are optional.
WIDGETS
Small and medium Home Screen widgets show the count and record a new entry without opening the app.
REMINDERS, IF YOU WANT THEM
Turn on a reminder for any tracker and choose the interval. They are off until you ask.
YOURS
Syncs through your own iCloud between iPhone and iPad. No account, no ads, no tracking.
Terms of Use: https://apps.iliausatov.com/oncelet/terms-of-use
Privacy Policy: https://apps.iliausatov.com/oncelet/privacy-policy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Small under-the-hood improvements that make Oncelet more stable.
The developer, Ilia Usatov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ilia Usatov
- Size
- 8.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Italian, Portuguese, Russian, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Oncelet Pro Yearly $9.99
- Oncelet Pro Lifetime $19.99
- Copyright
- © 2026 Ilia Usatov