Kronu

The alarm that talks back when time slips away

I'll watch the clock. You just leave.

Kronu is a leave-on-time alarm for people who lose track of time, including people with ADHD. It nudges you at 30, 15 and 5 minutes, rings even on silent, and keeps going until you tap “I left”.

Coming soonon the App Store for iPhone

One exit, five messages

Tell Kronu when you need to leave. It counts back from there and gets more insistent as time runs out.

  1. 30 minStart getting ready 👟
  2. 15 minStop whining and get moving 💪
  3. 5 minWhere are your shoes? 👟
  4. Leave timeTime to go! Go go go 🏃
  5. +3 min3 min late. Still home? 👀

Prefer it softer? Switch Kronu's tone to Gentle in Settings.

What else it does

Your calendar sets your alarms

Kronu sees the event, works out the trip and tells you when to leave. If the event moves, the alarm moves with it.

A real alarm

It rings through Silent mode and Focus. The system rings it, so the app does not need to stay open.

It stays on you

Stop turns off the sound. The nudges keep coming until you tap “I left”.

Routines, step by step

Split your morning into timed steps. Pick when you need to finish and Kronu works out when to start.

Always in sight

Time left on the Lock Screen and in the Dynamic Island, plus Home Screen widgets and a Control Center button.

Exits worth celebrating

Streaks, badges and confetti. A late exit still counts.

What's free and what's Pro

Free

  • Unlimited quick countdowns with the final alarm
  • 1 saved repeating alarm
  • 1 routine
  • Lock Screen countdown, widgets and shortcuts
  • Streaks, badges and confetti
  • Test alarm and reliability check

Pro

  • Nudges at 30, 15 and 5 minutes
  • Keeps going until you tap “I left”
  • Unlimited alarms and routines
  • Calendar alarms with travel time
  • 5 alarm sounds, themes and app icons

Your first alarm runs with everything on. Pro is a yearly plan with 3 days free, or a one-time lifetime purchase. Prices are shown in the app.

What Kronu promises, and where it stops

Promises

  • The final alarm rings on every plan.
  • No account. No ads.
  • Your purchase stays, even after a long break.
  • Your alarms and routines stay on your phone.

Limits

  • The alarm cannot ring if the phone is off.
  • After you stop the sound the alarm does not ring again. It sends notifications instead.
  • If notifications are off, nudges do not arrive.
  • Kronu does not diagnose or treat anything.

Questions

Is Kronu a medical app?

No. Kronu is a timing tool. It does not diagnose or treat ADHD or any other condition, and it does not replace a doctor's advice.

Will it ring on silent?

Yes. Kronu uses Apple's alarm system, so it rings in Silent mode and during Focus. Try it once in Settings, under Reliability, with Play test alarm.

Do I need an account?

No. There is no sign-up. Pro is tied to your Apple ID.

Which phones does it work on?

iPhones on iOS 26 or later.

Can I make it less cheeky?

Yes. In Settings, set Kronu's tone to Gentle and every message softens.