Koku
A focus timer for iPhone and Apple Watch, with alerts that are hard to miss.
Set a focus or break session and start. Koku keeps the timer visible through Live Activities and can show a full-screen alarm when time is up, even while the phone is locked or silent.
- Full-screen alerts when your session ends
- Apple Watch support
- Live Activity and lock screen controls
- Custom session lengths
- No ads, accounts, or subscriptions
One screen, one job
Koku started with a narrow requirement: a timer is not useful if I miss the alert. The iPhone app stays on one screen, with no accounts, streaks, social features, or subscriptions.
The work went into the timer itself: full-screen alarms, Live Activities, widgets, configurable sessions, and state shared with the Apple Watch app.
Common Questions
Does Koku work on Apple Watch?
Yes. Koku includes Apple Watch support for focus sessions away from your iPhone.
Does Koku support Live Activities and lock screen controls?
Yes. Koku includes Live Activity and lock screen controls so you can track a session without reopening the app.
Can I customize focus and break lengths?
Yes. You can use the classic focus rhythm or set your own session lengths.
Does Koku require an account or subscription?
No. Koku is free to download and use, with no account setup, ads, or subscriptions.