Customizable work/rest intervals, haptic cues, Apple Health integration, and Live Activity support — all designed for focused, distraction-free training.
No accounts. No cloud. No tracking. No ads. Everything is stored locally on your iPhone — we never see your data.
A focused interval timer built for real workouts — from HIIT to martial arts to yoga.
Create unlimited presets with work, rest, warmup, cooldown, rounds, and custom phase schedules. Save and reuse your favorite workout structures.
Track your timer right from the Lock Screen or Dynamic Island. See your current phase and time remaining without unlocking your phone.
Automatically log completed workouts to Apple Health with MET-based calorie estimates. Set intensity per preset for accurate tracking.
Four haptic intensity levels and customizable audio tones for every event — phase transitions, warnings, countdown, halfway point, and more.
Choose from six visual themes — System, Light, Dark, Bold, Soft, and fully Custom with 8 accent colors, corner styles, and motion settings.
Fully localized in English, Spanish, French, German, Italian, Russian, Japanese, and Chinese — with more on the way.
Kaizen Timer is built with privacy as a foundation, not an afterthought.
All presets, settings, and workout data stay on your device. No servers, no cloud.
No advertisements, no sponsored content, no distractions. Ever.
No analytics, no third-party SDKs, no data collection of any kind.
Open the app and start training immediately. No sign-up, no email required.
Have questions, feedback, or feature requests? We'd love to hear from you.