CoreWeight vs iyizen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CoreWeight
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CoreWeight — Everything You Need to Track Your Training. CoreWeight is a complete workout log for iPhone, iPad, Mac, and Apple Watch. Track strength training, cardio, body weight, body measurements, progress photos, personal records, and more — all in one place. Log your workouts quickly, review your progress with detailed charts, and stay motivated with goals and personal records. CoreWeight also includes a built-in HIIT & Tabata timer, photo comparisons, CSV import, and seamless iCloud sync across your Apple devices. KEY FEATURES • Quickly log exercises, sets, reps, and weight with minimal taps • Create workout menus and routines, or easily repeat previous workouts • Track training volume, estimated 1RM, body weight, body fat percentage, body measurements, heart rate zones, and more • Visualize your progress with detailed charts • Set goals and automatically track personal records • Compare Before & After photos side by side or with an overlay • Export progress photos as transition videos • Built-in HIIT & Tabata interval timer with customizable preparation, work, rest, and round settings • Sync your data across iPhone, iPad, Mac, and Apple Watch with iCloud • Import your existing workout history from CSV files • Create custom tracking fields and units • Share workouts and personal records with a single tap • Generate AI-ready prompts based on your recent training data FREE VERSION & LIFETIME LICENSE All CoreWeight features are available for free. The free iPhone and iPad versions display a banner ad on the Home screen. A one-time Lifetime License removes ads and lets you use CoreWeight without restrictions. The Mac version is ad-free. PRIVACY Your workout history, body measurements, and photos are stored on your device and in your own iCloud account. No CoreWeight account or login is required. Google AdMob is used only to display ads in the free iPhone and iPad versions. By using this app, you agree to Apple’s Standard End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.vision-structure.com/coreweight/privacy/
iyizen
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Track your workouts, see your progress, reach your goals. iyizen is a comprehensive fitness app that combines personal workout tracking and trainer-student connection in one place. Train solo or team up with your coach. WORKOUT TRACKING • 200+ exercise library to get started instantly • Log sets, reps, weight, and rest times • Drop Set, Rest-Pause, and Superset support • Automatic personal record detection with celebrations • Built-in rest timer between sets • Create your own custom exercises PROGRAMS & PLANNING • Build weekly training programs • Receive programs from your trainer, accept or decline • Track program completion progress • Free workout mode for unstructured sessions STATISTICS & ANALYSIS • Weekly and monthly workout summaries • Muscle group distribution charts • Volume and duration statistics • GitHub-style activity calendar • Personal records leaderboard • Muscle heatmap to visualize training intensity BODY TRACKING • Monitor weight changes with trend charts • Record and compare body measurements • Monthly progress photos for visual tracking APPLE WATCH SUPPORT • Control your workout from your wrist • Input weight and reps with Digital Crown • Rest countdown timer on your watch • Motion detection for automatic rep counting TRAINER MODE • Manage all your students from one dashboard • Create and send program templates • Track student statistics and progress • In-app messaging for direct communication SHARING & SOCIAL • Share your workout card on Instagram • Share your trainer profile with friends • Invite friends with referral links • Export workout data as CSV/PDF AND MORE • 6 color themes to personalize your experience • Dark mode support • Offline functionality • Push notifications and workout reminders • In-app support system Download now and take your training to the next level. Privacy Policy: https://iyizen.com/privacy Terms of Use: https://iyizen.com/terms
Screenshots
Verdict
The clearest difference is ads: iyizen at none against CoreWeight's shown. CoreWeight's advantage is update cadence (weekly vs every 3 weeks). On price, in-app purchases, 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. CoreWeight sells 3 in-app purchases, starting at $1.99 per month and iyizen sells 6 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.
CoreWeight ships an update weekly, iyizen every 3 weeks. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.
| Parameter | CoreWeight | iyizen |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroomi Kubo | Melih Colpan |
In-app purchases
CoreWeight
- Monthly Membership$1.991 Month
- Annual Membership$9.991 Year
- Lifetime License$4.99
iyizen
- Athlete Pro Monthly14 Days trial$14.991 Month
- Trainer Starter Monthly$19.991 Month
- Trainer Unlimited Monthly$29.991 Month
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- Athlete Pro Yearly$99.991 Year
- Trainer Starter Yearly$149.991 Year
- Trainer Unlimited Yearly$229.991 Year







