WhenNote: Countdown & Days
- iOS
- Android
Date notes and day counting — organise important dates, anniversaries and event spans.
App languagesTraditional ChineseSimplified ChineseEnglishJapanese
WhenNote keeps important dates clear and easy to revisit. Organize meaningful events in flexible notebooks, understand how much time has passed or remains, and handle everyday date calculations in one focused app.
Features
- Organize dates into separate notebooks
- Record names, descriptions, start dates, and end dates
- See elapsed, upcoming, and remaining time at a glance
- Calculate and total date intervals
- Add or subtract days, hours, and minutes
- Reorder notebooks and entries to match your workflow
- Optionally back up and restore through your private Google Drive app-data area
- Use the app in English, Traditional Chinese, Simplified Chinese, or Japanese
Your notes are stored on your device by default. When Google Drive backup is enabled, WhenNote requests access only to its own hidden app-data area—not your other Drive files.
No ads. No tracking. No unnecessary account required.
Download WhenNote on the App StoreGet WhenNote on Google Play
FAQ
How do I calculate the number of days between two dates?
Add an entry in WhenNote with a start date and an end date, and it shows the time between them in years, months and days. You can also total several date spans, or use the date calculator to add or subtract days, hours and minutes.
How does WhenNote count how long we've been together?
WhenNote counts the start date as day 1. Enter the day you got together as the start date and leave the end date empty, and it shows how long it has been up to and including today.
How can I count down to a date on my phone?
Set an entry's start date in the future and WhenNote shows how long until it begins; while an entry with an end date is under way, it shows the time remaining. It works on iPhone and Android.
Can WhenNote remind me of birthdays and anniversaries?
Yes. Each entry can have a reminder on the start date or a set number of days before, and birthdays and anniversaries can repeat every year.
Do I need an account?
No. Your notes stay on your device by default; a Google account is only needed if you turn on the optional Google Drive backup. No ads and no tracking.
