21 Day Container Tracker vs OptimalFit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
21 Day Container Tracker
This app helps users track their progress on a 21-day program. It allows for easy logging of containers, water intake, exercises, and body measurements. Visualize your journey with progress graphs and access an approved food list.
- Tap & Track™ container and water logging
- Automatic container generation
- Body Part Indicator™ measurements
- Exercise tracking with custom options
- Daily notes and body weight tracking
- Progress graphs
- Approved food list
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◆◆◆◆◆ "DON'T start the 21 day program without this app!" - Kristen 21 day users choose this app over all the others and here's why: ◆ Tap & Track™ to track containers & water! ◆ Offers Automatic Container Generation! ◆ Body Part Indicator™ measurements! ◆ Track your exercises and add custom exercises ◆ Add notes for each day of the program if desired ◆ Track body weight and body measurements ◆ See a list of approved foods for the 21 day program ◆ Flexible weight and exercise tracking! ◆ See a graph of your progress throughout the 21 days ◆ Easily edit, fix, and update your information for the app ◆ Created by 21 day users for 21 day users! ◆ Boost results by 200% and get your body beach ready! Join countless thousands of others and download this app to track your 21 day program so you can focus on succeeding and getting MAX RESULTS! ◆◆◆◆◆ - "Just tap a container color! No more tracking on paper! Love it!" - Kendra ◆◆◆◆◆ - "I can't imagine what else I would need in an app! " - Sarah ◆◆◆◆◆ - "Love this product! Definitely worth the buck!" - Foxxy1424612 ◆◆◆◆◆ - "So glad I found this app to guide me on my 21 day program!" - Emmi1212 P.S. Don't forget!! If you like the app, please rate it or write a review! If you have a problem contact us so that we have a chance to help you and fix any issues. Annual Subscription: - You can subscribe for weight/measurement tracking, approved food list, and unlimited access to all features of the app with no ads. - The subscriptions price is $29.99 USD yearly or equal to the same price tier that "Apple's App Store Matrix" determines in other currencies. - You may cancel a subscription or free-trial anytime via the subscription setting through your iTunes account. This must be done 24 hours before the end of the free-trial or subscription period to avoid being charged. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. No cancellation of the current subscription is allowed during active subscription period. Any unused portion of a free-trial period, will be forfeited when the user purchases a 21 Day Tracker Annual subscription Terms of use: http://cubesol.com/terms.html Privacy policy: http://cubesol.com/privacy.html
OptimalFit
This app offers personalized fitness and nutrition plans that adapt to your individual goals, schedule, and equipment. It provides AI-powered coaching and progress tracking to help you achieve sustainable improvements in your fitness and overall wellness.
- Customized resistance-training workouts
- Personalized nutrition guidance
- AI-powered coaching
- Progress tracking
- Adaptive to user needs
- Body composition improvements
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OptimalFit is a personalized fitness, nutrition and progress-tracking app that adapts to each member’s goals, schedule, equipment, activity and changing needs. Members receive customized resistance-training workouts, nutrition guidance, progress tracking and AI-powered coaching designed to support sustainable improvements in fitness, body composition and overall wellness. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://optimalfit.com/privacy
Screenshots
Verdict
The clearest difference is rating: 21 Day Container Tracker at 4.7 against OptimalFit's 3.3. 21 Day Container Tracker also leads on ratings volume (511 vs 16). OptimalFit's advantage is update cadence (every 3 days vs every 3 weeks). On price, ads, in-app purchases and monetization model 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. 21 Day Container Tracker sells 3 in-app purchases, starting at $4.99 per 7 days and OptimalFit sells 2 in-app purchases, starting at $19.95 per month. Whichever you choose, the download price is not the number that matters.
21 Day Container Tracker holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: 21 Day Container Tracker has 511 ratings behind it against 16, so its average is the more settled of the two.
21 Day Container Tracker ships an update every 3 weeks, OptimalFit every 3 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.
| Parameter | 21 Day Container Tracker | OptimalFit |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (511 ratings) — better | 3.3 (16 ratings) |
| Positive reviews | 74.3% of reviews | — |
| Number of ratings | 511 — better | 16 |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 45 MB | 64 MB |
| Age rating | 4+ | 17+ |
| Developer | Cube Software Solutions Inc. | Alex Borst |
Bugs and requests
21 Day Container Tracker
Reported bugs
3 issues- Data loss when switching between cycles
- Compatibility issues with older devices
- Inconsistent container tracking behavior
Requested features
5 requests- Ability to manually enter food items
- Long-term data tracking and analytics
- Integration with other fitness apps
- Customizable container settings
- Meal planning and recipe suggestions
OptimalFit
Not enough reviews yet to summarise bugs or requests.
In-app purchases
21 Day Container Tracker
- 21 Day Tracker Weekly3 Days trial$4.997 Days
- 21 Day Container Tracker Pro3 Days trial$29.991 Year
- 21 Day Tracker Annual Pro$29.991 Year
OptimalFit
- OptimalFit Membership$19.951 Month
- OptimalFit$199.001 Year
