Comparison

Cardio Conversion vs Kettlebel

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

Head to head
About

Cardio Conversion

Features
Read full description

Cardio Conversion instantly converts workout distances between gym equipment. When your workout calls for 400m run but you only have a rower, CardioConversion tells you exactly how many meters to row for equivalent effort. FEATURES • Convert between running, rowing, skiing, biking, and more • See calories burned for male and female athletes • Quick presets for common distances (400m, 800m, 1600m, 5000m) • Dark mode support • Works offline - no internet required PREMIUM FEATURES • Unlock additional equipment: burpees, pull-ups, wall balls, and more • Customize conversion ratios to match your fitness level • Reorder equipment tiles to match your preferences • Ad-free experience Perfect for CrossFit, functional fitness, and HYROX training. EQUIPMENT SUPPORTED Free: Outdoor Run, Row Erg, Echo Bike, Assault Bike Premium: AirRunner, Ski Erg, Bike Erg, Burpees, Pull-ups, Wall Balls, Double Unders, Box Jumps, Air Squats, Kettlebell Swings

About

Kettlebel

This app generates personalized kettlebell workouts based on your fitness goals, available equipment, and recovery status. It integrates with Apple Health to provide readiness scores and tracks your progress with detailed analytics and achievements. All your data remains on your device for enhanced privacy.

Highlights
  • Personalized workout generation
  • HealthKit-powered readiness scores
  • Progress tracking and analytics
  • 78 exercises with video demonstrations
  • Apple Watch companion app
  • On-device data storage
Features
Read full description

Kettlebel is a kettlebell training app that generates personalized workouts based on your goals, equipment, and recovery status. INTELLIGENT WORKOUT GENERATION Choose your training goal — Strength, Hypertrophy, or Conditioning — pick a duration (15, 35, or 50 minutes) and intensity level. Kettlebel builds a structured session with warm-up, working blocks, and cool-down, selecting from 78 exercises matched to your available equipment and preferences. HEALTHKIT-POWERED READINESS Kettlebel reads your heart rate variability, resting heart rate, and sleep data from Apple Health to calculate a daily readiness score. The app recommends workout intensity based on how recovered you are — push hard when you are fresh, dial it back when you need rest. PROGRESS TRACKING Track volume trends, muscle group balance, and personal records over weeks, months, and quarters. Rate each session with RPE scoring. See your training streaks, unlock achievements, and hit journey milestones as your practice grows. 78 EXERCISES WITH VIDEO Every exercise includes muscle engagement maps, movement instructions, coaching cues, and video demonstrations. Filter by equipment (kettlebell, dumbbell, bodyweight), difficulty, and target muscles. APPLE WATCH COMPANION Start and track workouts from your wrist. Heart rate monitoring, live session data, and automatic workout logging to Apple Health. ALL DATA STAYS ON YOUR DEVICE No accounts, no servers, no tracking. Your data lives on your device and syncs only through your personal iCloud. SUBSCRIPTION Kettlebel Pro unlocks unlimited workout sessions for $3.99/month. Free users get 1 session per week. Payment is charged to your Apple ID. Subscription auto-renews monthly unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in Settings > Apple ID > Subscriptions. Terms of Use: https://saadzniber.github.io/kettlebel-legal/ Privacy Policy: https://saadzniber.github.io/kettlebel-legal/

Screenshots

Cardio Conversion4 screens
Kettlebel4 screens

Verdict

The call

The clearest difference is in-app purchases: Kettlebel at none against Cardio Conversion's 1. Cardio Conversion's advantage is iOS requirement (15.1 vs 17.0). On price, 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. Cardio Conversion sells 1 one-off in-app purchase. Kettlebel asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Cardio Conversion versus Kettlebel: the parameters behind the verdict, then further details
ParameterCardio ConversionKettlebel
PriceFreeFree
Rating—2.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyWeekly—
AdsNoNo
In-app purchasesYesNo — better
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.1 — better17.0
Further details — not scored
Size33 MB140 MB
Age rating4+4+
DeveloperRyan RodemoyerSaad Zniber

In-app purchases

1 purchases

Cardio Conversion

One-time1
  • Premium Unlock$4.99
None

Kettlebel

No in-app purchases

Questions

Is Cardio Conversion free?
Cardio Conversion is free to download, with in-app purchases available.
Is Kettlebel free?
Kettlebel is free to download, with no in-app purchases.
Do Cardio Conversion or Kettlebel have ads?
Neither Cardio Conversion nor Kettlebel shows ads.

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