Comparison

Reminder Focus Timer vs Koku

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Reminder Focus Timer

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This app is a simple focus timer app built for users of the Reminders app. Setting a time based goal to complete your task can help you lock in your focus. This app provides a useful extension to the Reminders app by allowing you to manage your to-do list in the Reminders app, but focus with a timer on a specific goal or task in this app. MULTIPLE REMINDERS IN ONE TIMER You can select multiple reminders to complete in a single timer. Simply tap "Next" to mark off the current Reminder and move onto the next one. LIVE ACTIVITIES The app supports Live Activities to allow you to see your current focus timer on your lock screen. *Access to Reminders is required to the use the focus timer.

About

Koku

This app helps you focus on tasks with customizable work and rest intervals. It offers a simple, distraction-free interface and integrates with your home screen and Apple Watch for easy access and control. Enjoy deep work without accounts, streaks, or subscriptions.

Highlights
  • Customizable focus and rest sessions
  • Classic Pomodoro rhythm option
  • Home Screen widget for quick access
  • Live Activities on lock screen
  • Apple Watch companion app
  • Minimalist, distraction-free design
Features
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Koku is a focus timer for deep work. Focus. Rest. Repeat. Set your own session lengths or use the classic rhythm - twenty-five minutes of focus, five minutes of rest, a longer break every four sessions. Each minute is a dot. Watch them fill. - No accounts. - No streaks. - No subscriptions. Just time, and the work in front of you. Add Koku to your Home Screen for quick access - start, pause, and skip sessions right from the widget. Keep the timer visible on your lock screen with Live Activities. Koku also includes an Apple Watch companion app that works with the iPhone app, so you can check your timer and control sessions from your wrist. Designed for iPhone, with an Apple Watch companion. Light and dark mode. Works in any language. Koku (刻) is the Japanese word for a moment of time.

Screenshots

Reminder Focus Timer3 screens
Koku4 screens

Verdict

The call

The clearest difference is update cadence: Reminder Focus Timer at daily against Koku's every 3 days. Reminder Focus Timer also leads on iOS requirement (17.4 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Reminder Focus Timer ships an update daily, Koku every 3 days. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 7 level
Reminder Focus Timer versus Koku: the parameters behind the verdict, then further details
ParameterReminder Focus TimerKoku
PriceFreeFree
Rating—3.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyDaily — betterEvery 3 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS17.4 — better26.4
Further details — not scored
Size1 MB10 MB
Age rating4+4+
DeveloperTravis ChapmanRodolfo Alberto Lopez Terriquez

In-app purchases

None

Reminder Focus Timer

No in-app purchases

None

Koku

No in-app purchases

Questions

Is Reminder Focus Timer free?
Reminder Focus Timer is free to download, with no in-app purchases.
Is Koku free?
Koku is free to download, with no in-app purchases.
Do Reminder Focus Timer or Koku have ads?
Neither Reminder Focus Timer nor Koku shows ads.
Which is updated more often, Reminder Focus Timer or Koku?
Reminder Focus Timer ships an update daily, and Koku every 3 days. Most recently, Reminder Focus Timer was updated on October 9, 2026 and Koku on October 11, 2026.

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