Boxa vs Kaizen Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Boxa
This app calls out boxing combinations in real-time to guide your shadowboxing or bag work. It offers customizable workouts, combo generation, and support for various disciplines like boxing, kickboxing, and Muay Thai, all without distractions.
- Real-time combo calling
- Customizable workouts
- Combo generator
- Support for boxing, kickboxing, Muay Thai
- Timed rounds and custom moves
- No equipment or partner needed
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Shows up. Calls your combos. Disappears. Tap start and go. Combos called out as you shadow box solo or hit the bag. Stay in the workout, not in your head. "Great shadowboxing app with the right features to get going." - Ara Keeps up as you get serious. It's all in there. Boxing, kickboxing, and Muay Thai. Ready-made workouts and training drills from cardio to fight simulation. Punches, kicks, elbows, knees, defense, and footwork. Never run out of combos. The combo generator builds a fresh set in seconds. Pick your moves, set the length, and go. Make it yours. Build your own combos, custom moves and timed rounds. Set your pace, pick your discipline, train exactly how you want. No equipment or partner needed. "It gives you thousands of combo options. If you don't know how to create one, it will do it for you… It has everything: kicks, dodges, punches, elbows… it's insane." - M.C.E.L.P Forget it until you need it. No subscription hanging over you. No notifications pulling you back in. No ads. Use it free or pay once. Either way, the app stays out of your life until you want it. "Simple and easy to use, it limits all distractions." - Chutong
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 work–rest 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 • Presets for popular training styles • Fully customizable work and rest intervals • Advanced phase sequencing for complex workouts • Clear visual and audio timers • Accurate round and phase tracking • Reliable timing when backgrounded or locked • Home Screen widgets for quick access • Light and dark mode support • Optional Apple Health integration for workouts and calorie estimation • Export completed workouts • 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
Screenshots
Verdict
The clearest difference is in-app purchases: Kaizen Timer at none against Boxa's 3. 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
Both are free to download. Boxa sells 3 one-off in-app purchases. Kaizen Timer asks for nothing beyond the download.
Boxa ships an update every 4 days, Kaizen Timer every 3 days. The most recent releases landed on September 25, 2026 and September 14, 2026 respectively.
| Parameter | Boxa | Kaizen Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.6 |
| Further details — not scored | ||
| Size | 55 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Favey | Stefan Dasic |
In-app purchases
Boxa
- Shadowboxing.pro Special Offer$3.99
- Shadowboxing.pro lifetime$8.99
- Boxa Plus$19.99
Kaizen Timer
No in-app purchases









