Koku vs ZenFocus

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.

Leaving your seat with the timer running? That's not studying. ZenFocus analyzes your AirPods' motion sensor and Apple Watch's heart rate & movement to distinguish genuine focus time from distraction. Not "time spent sitting" — but your actual focused time. [Key Features] ▶ AirPods Focus Detection Your AirPods' motion sensor tracks whether they're worn and how your head moves, so we can tell when you're truly focused. No extra devices needed — just your AirPods. ▶ Apple Watch Integration Check your real-time focus level from your wrist and start or stop sessions right from the Watch app. Heart rate and wrist movement are analyzed together for more accurate tracking. ▶ Detailed Statistics View today's, this week's, and all-time study hours at a glance — and understand your learning patterns. ▶ Nationwide Rankings Compare your study hours with other students through regional and nationwide leaderboards to stay motivated. [Who It's For] • Anyone curious about their actual focus time — not just how long they sat at a desk • Students preparing for exams, college, or certifications who want data-driven study habits • Self-studiers who need motivation to keep going Start tracking your real study time with ZenFocus today. [Subscription] Some features require a ZenFocus subscription that auto-renews. (Pricing and duration shown in-app.) • Payment is charged to your Apple ID upon purchase confirmation. • Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. • Manage or cancel in Settings > Apple ID > Subscriptions after purchase. Terms of Use (EULA): https://zen-focus-app-fdf5b.web.app/terms.html Privacy Policy: https://zen-focus-app-fdf5b.web.app/privacy.html