Kaizen Timer vs Herflow
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Kaizen Timer
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Kaizen Timer is a customizable interval timer for boxing, HIIT, Tabata, treadmill workouts, strength training, and more. Build simple workβrest intervals or create advanced multi-phase workouts that match exactly how you train. Start quickly with ready-made presets, or customize every phase, round, work period, and rest period. FEATURES β’ Presets for popular training styles β’ Fully customizable work and rest intervals β’ Advanced phase sequencing for complex workouts β’ Clear visual and audio timers β’ Accurate round and phase tracking β’ Reliable timing when backgrounded or locked β’ Home Screen widgets for quick access β’ Light and dark mode support β’ Optional Apple Health integration for workouts and calorie estimation β’ Export completed workouts β’ Available in multiple languages, including: English, French, German, Italian, Russian, Spanish, Japanese, Chinese BUILT FOR CONSISTENCY Set your training intensity and let Kaizen Timer handle the structure. Timers stay accurate even during interruptions, helping you stay focused through every round. FREE TO USE All Kaizen Timer features are available for free. An optional support subscription helps fund ongoing development, but subscribing is never required to access features or content. Train smarter. Stay focused. Improve every round. Terms of Use: https://kaizentimerapp.com/terms.html Privacy Policy: https://kaizentimerapp.com/privacy.html
Herflow
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HerFlow β Your Smart Period & Cycle Tracker HerFlow helps you track your period, predict ovulation, and understand your menstrual cycle with a simple and beautiful calendar. Designed for women who want accurate cycle predictions and better health insights. Track Your Cycle Easily Log your period in seconds See upcoming periods instantly Smart menstrual calendar Ovulation & Fertility Prediction Predict fertile days Plan pregnancy or avoid surprises Accurate cycle predictions Understand Your Body Track mood & symptoms PMS insights Cycle health trends Private & Secure Your health data stays private and secure on your device. Perfect for Women tracking their period Cycle & ovulation tracking Fertility awareness Download HerFlow and take control of your cycle today.
Screenshots
Verdict
The clearest difference is update cadence: Herflow at daily against Kaizen Timer's every 3 days. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Kaizen Timer ships an update every 3 days, Herflow daily. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.
| Parameter | Kaizen Timer | Herflow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | Daily β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 β better |
| Further details β not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Dasic | RUEBEN ANSOLIWEN AKANKOBATENG |
In-app purchases
Kaizen Timer
No in-app purchases
Herflow
No in-app purchases









