OKIRO - Alarm Clock That Works
Mission alarm & sleep insight
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Fixes a crash when opening “How to use OKIRO”, and makes the wake check after stopping on Apple Watch, snooze and mission clearing behave as set.
OKIRO is the alarm that never gives up. Solve a mission — math, shake, typing, memory, steps, photo, or an NFC tag — to prove you're truly awake.
NEW: SLEEP ANALYSIS (Pro)
Wear an Apple Watch to bed and OKIRO reads last night from Health: stages, heart rate, HRV, breathing, blood oxygen, wrist temperature, even how loud your room got.
But a number only answers "what". OKIRO answers "why" — in a sentence.
"You had 10 minutes of daylight yesterday, well under your usual, and took 40 minutes to fall asleep."
"Your room reached 68 dB overnight and you surfaced 3 times."
"You went to bed at close to your usual time. Steady beats long."
Every reading is shown against your own normal, so there is nothing to look up. A wrist temperature of 33.6°C tells nobody anything; "0.3° above your normal" tells everybody something.
It shows yesterday's daylight and activity alongside the night they shaped — the parts you can actually change before tonight. Export a fortnight as a spreadsheet if you want to show a doctor.
Read-only. OKIRO never writes to Health and never uploads anything.
NEW: WORK BACKWARDS FROM ARRIVAL (free)
Tell it when you need to be somewhere. It subtracts travel and getting-ready time and sets the alarm. No more mental arithmetic at midnight.
NEW: SKIP PUBLIC HOLIDAYS (free)
A weekday alarm can sit out Japanese public holidays. Worked out on your iPhone — nothing is downloaded.
NEW: POWER NAP (free)
One tap for a 10–90 minute nap. No mission, and it clears itself away afterwards.
NEW: 44 ALARM TONES, SEARCHABLE (Pro for the full set)
Temple bell, music box, taiko, an old telephone — plus voices that call you until you're up. Search by name or by mood.
TRIPLE-DEFENSE RINGING
Apple's iOS 26 alarm system rings through Silent and Focus modes. A notification chain keeps going even with the app closed. And full in-app ringing drives you to the mission.
WAKE CHECK (Pro)
A few minutes after you stop the alarm, OKIRO asks if you're still up. No answer, and it rings again.
PARTNER SILENT MODE (Pro, Apple Watch)
Wake up without waking whoever is next to you. Your Watch buzzes instead of the phone ringing. If the Watch doesn't respond in time, the phone rings normally — you'll never miss an alarm.
SLEEP SOUNDS
White noise generated on-device, real recordings of rain, waves and fireplace seamlessly looped. Fade-out timer included, no extra downloads.
COMPLETELY PRIVATE
No account. No ads. No tracking. Not your photos, not your sleep — nothing leaves your phone.
OKIRO PRO (subscription)
• Sleep analysis, unlimited alarms, all 7 missions, wake check
• Partner Silent Mode and smart wake on Apple Watch
• All sleep sounds, detailed stats, widgets, all 44 tones
• ¥480/month or ¥2,400/year, with a 7-day free trial
Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel in Settings after purchase.
Terms: https://ohtakaisei.github.io/okiro-legal/terms.html
Privacy: https://ohtakaisei.github.io/okiro-legal/privacy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixes.
“How to use OKIRO” closed the app
Opening the guide made the app quit. It opens now.
The wake check after stopping on Apple Watch (Pro)
If the iPhone app wasn't running, stopping the alarm on your watch could skip the wake check and leave no record of the morning. The iPhone now picks up the watch's dismissal even when closed, and the wake check, wake log and streak follow.
Snooze and switching off
An alarm switched off mid-snooze still rang at the snooze time — no longer. On iOS 26 the snooze re-ring is a system alarm too, so it sounds through Silent mode and Focus. Yesterday's snooze count no longer carries into the next morning.
After you clear the mission
Sound and notifications stop and the morning is recorded the moment you clear it. Closing without tapping “Start My Day” no longer loses the record or the next alarm. Opening the app while an alarm rang could silence the system alarm — fixed.
Screens that wouldn't swipe away
The Pro screen and “Redeem a code” now close when you pull them down.
Translations
Some text showed in English on Japanese devices; the holiday names and the code screen showed Japanese on English ones.
The developer, KAISEI OTA, 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
- KAISEI OTA
- Size
- 10.3 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- OKIRO Pro Monthly $2.99
- OKIRO Pro Yearly $14.99
- Copyright
- © 2026 Kaisei Ota
