Anchored to the day
Set alarms relative to sunrise, noon, sunset, or nadir. Choose an offset — the alarm recalculates daily to stay in sync with the real sky. Define it once. It stays right all year.
Risetime Sunrise alarm app for Android.
Your celestial alarm clock.
Set your alarm to the sun. It shifts every day so you don't have to.
Google PlayOpen testing
Risetime is in open testing, so you join the test first and install from Play afterwards. Without that step Play may tell you the app isn't available in your country.
How the sunrise alarm works
- Pick your anchorChoose a celestial event: sunrise, noon, sunset, or nadir. This is the reference point your alarm tracks.
- Set your offsetDecide how far before or after. Thirty minutes before sunrise. One hour after sunset. Pick which days it repeats.
- That's itRisetime recalculates the exact alarm time every day. Sunrise drifts with the seasons — your alarm follows. You never adjust it.
Features of the Risetime sunrise alarm app
Offline and private by design
Risetime has no internet permission. Not disabled — absent. Sunrise times are calculated on your device using astronomical math. No servers. No accounts. No data leaves your phone.
Set it, then forget it
The app recalculates your alarm times in the background every day. Most days you never open it. That is by design — Risetime works best when you forget it exists.
Real alarms, not notifications
Risetime uses the same OS-level alarm API as your built-in Android clock. Your alarm survives Doze mode, battery optimization, and device restarts. When it is time to wake up, your phone rings.
Countdown timers, in the same app
A keypad, a list sorted by duration, and a repeat mode whose cycles stay in phase — for intervals, workouts and study blocks. Timers guide
What more you can do with Risetime
Who uses a sunrise alarm app, and what they set:
- A day that follows the sun — wake at sunrise, wind down before it, and keep clock alarms for the hours other people expect of you. Circadian rhythm alarm for Android
- Photographers and astronomers — golden hour, blue hour and astronomical night are angles of the sun, not fixed times. Set the angle once; it holds at every latitude and season, offline in the field. Golden hour, blue hour and night sky alarms
- Meditation, yoga and a practice at first light — the sun salutation as the light arrives, or a sit before it. Anchor on sunrise, on civil dawn by its angle, or on a fraction of the night. Sunrise meditation and yoga alarm
- Dawn patrol — out in the water before the light, on an alarm that moves with first light instead of a time you reset every few weeks.
- Pre-dawn risers — set your offset before sunrise once and it tracks sunrise every day. Check your own timetable for the exact moment; the alarm is the part that never drifts.
- Outdoor workers, dog walkers, farmers — if your day starts with daylight, your alarm should too.
- Intervals, workouts, study blocks — countdown timers that restart themselves, in the same app. Repeating countdown timers
- Anyone tired of adjusting throughout the year — set it once. It stays right. How to set a sunrise or sunset alarm on Android
Screenshots — sunrise alarm app for Android
Offline sunrise alarm — no internet, no tracking
Risetime does not request internet permission. There is no server. There is no account to create. There is no analytics SDK measuring how you use the app.
- No
INTERNETpermission — the app cannot connect to the internet - No analytics, crash reporting, or telemetry of any kind
- No accounts, no cloud sync, no sign-in
- Location stays on your device — used only for sunrise math
- No ads, no tracking, no data shared with anyone
Free for up to three alarms. Unlimited as a supporter.
Risetime is free for up to three alarms and three timers — for good.
Need more? Use those three first, and see if it's worth your support: supporters get unlimited alarms and timers, yearly or once. If not, I'll be happy to hear you out. You'll find it in Settings.
No nag screens, no countdowns, no "upgrade to continue" prompts. Just an honest option when you're ready.
Frequently asked questions
- What does Risetime actually do?
- Risetime is an alarm clock that can tie an alarm to a moment of the sun. Set “30 minutes before sunrise” once and the alarm recalculates every day for your location, so it follows the sun through the year. It also does ordinary fixed-time alarms and countdown timers.
- Does Risetime need an internet connection?
- No. Risetime has no internet permission at all — it cannot connect, even if it wanted to. Sunrise and sunset times are computed on your device. It works in airplane mode, in the field, anywhere.
- Does Risetime also handle normal fixed-time alarms?
- Yes. Ordinary clock alarms and sun-anchored alarms live in the same list, and countdown timers have their own tab, with their own sound and volume settings.
- Can I set an alarm for dawn, golden hour or the dark of night?
- Yes, by the angle of the sun. Create an anchor at −6° for civil dawn, +6° in the evening for golden hour, −18° for astronomical night, and set alarms on them. Where an angle is never reached for part of the year, the app says so and the alarm skips those days rather than ring at an invented time.
- Does the alarm still go off in Doze mode or Battery Saver?
- Yes. Risetime uses Android’s setAlarmClock API — the same system-level mechanism as your built-in clock app — and a Reliability screen checks the permissions your phone needs. Alarms ring even before the first unlock after a restart.
- Is Risetime free?
- Free for up to three alarms and three timers, for good. Need more? Use those three first, and see if it’s worth your support: supporters get unlimited alarms and timers, yearly or once.
Ready to rise with the sun?
Google PlayOpen testingRisetime is in open testing, so you join the test first and install from Play afterwards. Without that step Play may tell you the app isn't available in your country.