Delkoku - Leave-By Alarm
Count back from arrival time
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Work backward from your desired arrival time, set a departure alarm, and keep travel preparation on schedule.
"Just five more minutes" is the killer. Suddenly, your leave-by time is already gone.
Delkoku is an anti-lateness alarm: enter when you want to arrive, and it automatically counts back to
- when you should leave home, and
- when you should start getting ready.
■ Staged alarms stop time-blindness
Start prep → 10 minutes out → 5 minutes → leave now!
The classic multi-stage alarm technique loved by people with ADHD and anyone with a slippery sense of time, set with one tap. Alarms ring even while the app is open.
■ Delkoku does the math, you just get ready
Enter arrival time, travel time, prep time, and a safety buffer - the back-calculation is automatic. Save your frequent places and travel time from your current location is computed in one tap (train, car, walking).
■ Departure countdown
A big ring on the home screen counts down to departure every second. Tap "I left!" to stamp the moment.
■ A track record builds the habit
On-time departure rate, consecutive on-time streak, and a 14-day chart. Not to scold you - to stack up the days you made it.
■ Privacy first
Events, places, and records stay on your device. Nothing is sent to a server. Location is used only to compute travel time.
■ Everything is free
Unlimited places and events. Back-calculation, staged alarms, and stats are all free. The bottom banner ad can be hidden forever with a one-time "Remove Ads" purchase ($0.99, no auto-renewal). No subscriptions.
For the days you absolutely cannot be late - go with Delkoku.
Note: This app is not a medical device. It is not intended to diagnose, treat, or prevent ADHD or any condition, and is no substitute for medical advice.
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The developer, 丽佳 施, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 丽佳 施
- Size
- 5 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $0.99
- Copyright
- © 2026 Jayden Chen