Comparison

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

Focus Timer

Features
Read full description

Transform your productivity with Focus Timer. Focus Timer uses the proven Pomodoro Technique to help you break work into focused intervals, separated by short breaks. Build healthy work habits, prevent burnout, and maximize your output every day. Key Features: • Customizable focus sessions and smart breaks • Focus streak tracking to build consistency • Task insights to see where your time goes • Achievement badges to stay motivated • Daily and weekly productivity statistics • Beautiful, distraction-free interface • Works fully offline Premium Features: • Full focus calendar with monthly navigation • Best streak records and advanced analytics • Task productivity breakdown by project • Custom timer durations from 1 to 180 minutes • Daily focus reminder notifications • Detailed weekly trends and daily activity charts Perfect for students, professionals, freelancers, writers, and anyone looking to improve focus and productivity. Terms of Use (EULA): https://legal.timesleap.com/focus-timer-terms-of-use.html Download Focus Timer today and start building better work habits!

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
Read full description

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

Focus Timer4 screens
Koku4 screens

Verdict

The call

The clearest difference is in-app purchases: Koku at none against Focus Timer's 4. Focus Timer's advantage is iOS requirement (17.0 vs 26.4). On price, update cadence, ads 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. Focus Timer sells 4 in-app purchases, starting at $1.99 per 7 days. Koku asks for nothing beyond the download.

UpkeepUpdate frequency

Focus Timer ships an update weekly, Koku every 3 days. Both last shipped on October 31, 2026.

Scorecard2 real differences · 7 level
Focus Timer versus Koku: the parameters behind the verdict, then further details
ParameterFocus TimerKoku
PriceFreeFree
Rating—3.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.0 — better26.4
Further details — not scored
Size3 MB10 MB
Age rating4+4+
DeveloperChengdu Times Leap Technology Co., Ltd.Rodolfo Alberto Lopez Terriquez

In-app purchases

4 purchases

Focus Timer

Subscriptions4
  • Focus Timer Premium Weekly$1.997 Days
  • Focus Timer Premium Monthly$4.991 Month
  • Focus Timer Premium Quarterly$9.993 Months
Show 1 more
  • Focus Timer Premium Yearly$19.991 Year
None

Koku

No in-app purchases

Questions

Is Focus Timer free?
Focus Timer is free to download, with in-app purchases available.
Is Koku free?
Koku is free to download, with no in-app purchases.
Do Focus Timer or Koku have ads?
Neither Focus Timer nor Koku shows ads.
Which is updated more often, Focus Timer or Koku?
Focus Timer ships an update weekly, and Koku every 3 days. Most recently, Focus Timer was updated on October 31, 2026 and Koku on October 31, 2026.

Other comparisons