Reminder App
Set reminders for important tasks. Get browser notifications.
No reminders yet.
Reminders fire while this page is open (checked every 5s). For notifications when the tab is closed, use an OS-level reminder - this tool stays fully local & private.
About Reminder App
Set reminders for important tasks. Get browser notifications.
Reminder App does calendar-aware date and time math for you, handling leap years and variable month lengths so the numbers you get are correct.
How to Use Reminder App
- Enter the date, time or duration values requested.
- Choose any options such as format or inclusive counting.
- The result appears instantly.
- Copy the output if you need to keep it.
Key Features
- Calendar-accurate results, including leap years.
- Instant answers with a clear, readable format.
- No timezone setup required for everyday date math.
Frequently Asked Questions
Does Reminder App account for leap years?
Yes. Date and time calculations account for leap years and the differing lengths of months, so durations and differences are accurate.
Is Reminder App free to use?
Yes. Reminder App is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Reminder App runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Reminder App work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
Related Time Tools
Pomodoro Timer
Stay focused with the Pomodoro technique. Work in focused intervals with breaks.
Focus Mode Timer
Block distractions and focus on work with a customizable focus timer.
Study Timer
Track your study sessions with a dedicated study timer. Stay focused.
Exam Countdown
Countdown to your exams. Track time remaining until important tests.