Comparison

Boxa vs Kaizen Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time combo calling
  • Customizable workouts
  • Combo generator
  • Support for boxing, kickboxing, Muay Thai
  • Timed rounds and custom moves
  • No equipment or partner needed
Features
Read full description

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

About

Kaizen Timer

Features
Read full description

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

Boxa4 screens
Kaizen Timer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Boxa sells 3 one-off in-app purchases. Kaizen Timer asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Boxa versus Kaizen Timer: the parameters behind the verdict, then further details
ParameterBoxaKaizen Timer
PriceFreeFree
Rating4.5 (4 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings4 — better—
Update frequencyEvery 4 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.6
Further details — not scored
Size55 MB3 MB
Age rating4+4+
DeveloperThomas FaveyStefan Dasic

In-app purchases

3 purchases

Boxa

One-time3
  • Shadowboxing.pro Special Offer$3.99
  • Shadowboxing.pro lifetime$8.99
  • Boxa Plus$19.99
None

Kaizen Timer

No in-app purchases

Questions

Is Boxa free?
Boxa is free to download, with in-app purchases available.
Is Kaizen Timer free?
Kaizen Timer is free to download, with no in-app purchases.
Do Boxa or Kaizen Timer have ads?
Neither Boxa nor Kaizen Timer shows ads.
Which is updated more often, Boxa or Kaizen Timer?
Boxa ships an update every 4 days, and Kaizen Timer every 3 days. Most recently, Boxa was updated on September 25, 2026 and Kaizen Timer on September 14, 2026.

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