Comparison

Kiiro vs CellFit

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

Head to head
About

Kiiro

This app helps runners understand their training by analyzing data like training load, heart rate zones, and progress. It provides clear insights and warnings to prevent overtraining and ensure effective workouts.

Highlights
  • Training load analysis
  • Heart rate zone tracking
  • Progress visualization
  • VO2 max trends
  • Automatic route matching
  • Personal records
Features
Read full description

Build an adaptive running plan around your life—and bring every workout to Apple Watch. Kiiro combines flexible training plans, run tracking, and detailed Apple Watch data in one place. AN ADAPTIVE RUNNING PLAN Tell Kiiro about your running experience, available days, weekly training time, and preferred long-run days. Kiiro builds a plan around your schedule and keeps the weeks ahead aligned with the training you actually complete. • Easy runs, long runs, intervals, warmups, and cooldowns • Duration and heart-rate targets for structured sessions • A choice of progression styles, from patient to ambitious • Plan alignment and training-load guidance after every run MADE FOR APPLE WATCH RUNNERS Send scheduled runs to the Workout app on Apple Watch and follow each structured session from your wrist. Record your workout as usual, then let Kiiro sync and analyze the result. • Keep upcoming workouts on Apple Watch • Compare your completed run with the planned target • Automatically connect recorded runs to your training plan • See your schedule, workout details, and progress on iPhone FLEXIBLE WHEN LIFE CHANGES Missed a day or need to move a run? Reschedule the current or next week and Kiiro rebuilds it around the days that still work. Change your availability, weekly time, frequency, long-run preference, or progression style whenever your routine changes. DETAILED RUN TRACKING AND ANALYSIS Go beyond a basic distance tracker. Kiiro turns Apple Watch workout data into a clear picture of each run and your longer-term progress. • Explore route maps, splits, pace, distance, duration, elevation, and energy • Review heart rate, zones, cadence, power, stride length, vertical oscillation, and ground contact time when recorded • Move between summary, performance, and history views for each workout • Compare every attempt on the same route to see where you improved • Edit workout details or merge sessions when a workout was recorded in separate parts UNDERSTAND YOUR TRAINING OVER TIME Kiiro brings individual workouts and long-term trends together, so your Apple Watch data becomes useful guidance instead of a collection of numbers. • Training Load shows your recent effort and short-term fatigue • Fitness Level follows the longer-term training base you are building • Load Balance helps show whether you are fresh, building, balanced, fatigued, or pushing too hard • Running Score lets you compare performance across intervals, long runs, and recovery runs • Follow VO₂ Max, HRV, resting heart rate, walking heart rate, and cardio recovery trends • Discover personal bests and milestones such as your fastest efforts, longest run, longest streak, biggest week, and biggest month SET GOALS AND STAY CONSISTENT Create weekly, monthly, or yearly goals for workout count, distance, training time, calories, or elevation. Follow your progress and see whether you are ahead, on track, or behind. ONE CONNECTED TRAINING LOOP Plan on iPhone. Train with Apple Watch. Review your run in Kiiro. Use what you actually completed to guide what comes next. Kiiro is designed for runners who want the convenience of Apple Watch with more structure, more useful data, and a plan that fits real life. Some features require a Kiiro Pro subscription. Available metrics depend on the data recorded by your devices and the permissions you choose to share through the Health app. Terms of Use: https://kiiro.app/terms Privacy Policy: https://kiiro.app/privacy

About

CellFit

Features
Read full description

A smarter way to train—one card at a time. CellFit transforms a simple deck of playing cards into a powerful, endlessly adaptable workout system. No fixed routines, no unnecessary complexity—just structured, effective training that grows with you. You will simply not out train the CellFit system. Whether you are exercising at home or coaching others, CellFit makes workouts engaging, repeatable, and easy to follow. Flip a card, complete the exercise, and keep moving. Designed for individuals and fitness professionals alike, CellFit combines flexibility, secure cloud storage, and modern sign-in to deliver a reliable training experience across devices. Simple to start. Powerful to scale. Privacy Policy: https://cellfit.com.au/privacy-policy Terms of Use: https://cellfit.com.au/terms-of-service Apple Standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Kiiro4 screens
CellFit4 screens

Verdict

The call

The clearest difference is in-app purchases: Kiiro at none against CellFit's 9. Kiiro also leads on update cadence (fortnightly vs every 3 months). CellFit's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price and ads 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. CellFit sells 9 in-app purchases, starting at $0.99 per month. Kiiro asks for nothing beyond the download.

UpkeepUpdate frequency

Kiiro ships an update fortnightly, CellFit every 3 months. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

Scorecard4 real differences · 5 level
Kiiro versus CellFit: the parameters behind the verdict, then further details
ParameterKiiroCellFit
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyFortnightly — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.015.1 — better
Further details — not scored
Size55 MB37 MB
Age rating17+4+
Developerendurance101 OÜMICHAEL P KALAF

In-app purchases

None

Kiiro

No in-app purchases

9 purchases

CellFit

Subscriptions9
  • CellFit Pro Level Up$0.991 Month
  • CellFit Pro Custom Level Up$2.991 Month
  • CellFit Pro Level Up$3.993 Months
Show 6 more
  • CellFit Professional Level Up$5.991 Month
  • CellFit Pro Custom Level Up$9.993 Months
  • CellFit Pro Level Up$12.991 Year
  • CellFit Professional Quarterly$19.993 Months
  • CellFit Pro Custom Level Up$29.991 Year
  • CellFit Professional Level Up$59.991 Year

Questions

Is Kiiro free?
Kiiro is free to download, with no in-app purchases.
Is CellFit free?
CellFit is free to download, with in-app purchases available.
Do Kiiro or CellFit have ads?
Neither Kiiro nor CellFit shows ads.
Which is updated more often, Kiiro or CellFit?
Kiiro ships an update fortnightly, and CellFit every 3 months. Most recently, Kiiro was updated on October 10, 2026 and CellFit on October 11, 2026.

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