Whizz vs KettleCore Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Whizz
This app provides personalized indoor cardio training plans generated by AI. It tracks your performance with detailed statistics, offers global challenges, and supports various cardio machines for weight loss, fitness improvement, or competition preparation.
- AI-generated personalized training plans
- Supports various cardio machines
- Calculates fitness indicators (VO₂max, BMI)
- Tracks session progress and statistics
- Global community challenges and rankings
- Instant access to training history
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Finally, an app dedicated to indoor cardio training! With personalised training plans generated by artificial intelligence (AI). Discover Whizz, the first mobile app dedicated to indoor cardio training, designed to support you in your gym or home workouts. Whether you use a treadmill, bike, rowing machine, elliptical trainer, stepper, climber... Whizz generates training plans, records your cardio sessions and gives you accurate and detailed statistics on your performance... Why choose our Whizz app? • It generates intelligent programmes: our AI learns from you, adjusts the intensity and guides you to progress. • It calculates your fitness indicators: life expectancy gained, maximum oxygen consumption (VO₂max), maximum aerobic speed (VMA), physiological age, body mass index (BMI), personal bests... your performance will hold no more secrets. • Clear and motivating statistics: track your progress session after session and stay motivated. • Global challenges: compare yourself to the Whizz community, challenge your friends, climb the rankings. • No more taking photos of your cardio machine screens: with Whizz, you can access your history instantly and easily. • Train anywhere, anytime: at the gym, at home or on the go. Whizz offers different types of training programmes: • Weight loss: burn maximum calories with targeted and effective workouts • Getting back in shape: rediscover the joy of exercise with gentle and progressive sessions • Cardio training performance improvements: improve your VO₂max, VMA and ability to sustain longer and more intense efforts • Competition preparation: our AI adjusts each session to your fitness level so that you arrive ready, motivated and confident on the day of your competition. Results you'll love • More motivation thanks to a programme that adapts to you. • Visible and measurable progress in just a few weeks. • The pleasure of pushing yourself, without ever injuring or exhausting yourself. Download Whizz today and join the new generation of cardio training.
KettleCore Sync
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Your personalized coaching app. Track your workouts, check your programs and stay connected with your coach, wherever you are. Features: - Personalized training programs - Progress tracking - Direct messaging with your coach - Notifications and reminders
Screenshots
Verdict
The clearest difference is in-app purchases: KettleCore Sync at none against Whizz's 2. Whizz's advantage is update cadence (every 9 days vs every 2 months). On price, ads, device support and iOS requirement 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. Whizz sells 2 in-app purchases, starting at $3.99 per month. KettleCore Sync asks for nothing beyond the download.
Whizz ships an update every 9 days, KettleCore Sync every 2 months. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.
| Parameter | Whizz | KettleCore Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 81 MB | 128 MB |
| Age rating | 4+ | 4+ |
| Developer | OptimaSport | Ekklo |
In-app purchases
Whizz
- Monthly subscription1 Month trial$3.991 Month
- Yearly subscription7 Days trial$29.901 Year
KettleCore Sync
No in-app purchases
