21 Day Container Workout Fix vs OptimalFit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
21 Day Container Workout Fix
Easily track your 21-day workout progress with this intuitive fitness app. It replaces paper calendars, offers a calorie calculator, BMI tracking, and photo logging to monitor your transformation. Stay motivated with reminders and custom graphs.
- Ad-free tracking
- Calorie calculator
- BMI calculator
- Workout streaks tracker
- Custom progress graphs
- Nutrition notes
- Progress photo logging
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21 Day Container Workout Fix is the best and easiest to use fitness app for tracking your 21 Day workout. This app is only for 21 Day Container Workout Fix Users for tracking their workout progress. I personally really enjoy the Workout series. Hence I wanted to make the best possible app to track my progress using it. This app is also designed to replace the standard paper calendar that comes with the Insanity workout, allowing you to easily track your progress. FEATURES: ▸ Simple, easy, intuitive & also Ad-free! ▸ Free Download: You can use the app for as long as you like to see if it matches your requirements. ▸ Calorie Calculator: Exclusive for this Workout giving you the ability to find approximate Calories burnt for each workout without any device! ▸ BMI Calculator: Tells your BMI and Body Type ▸ Streaks Tracker: Shows you your workout Streaks elegantly on the calendar ▸ Workout Reminder: Enables you to set daily reminders for your workout ▸ Custom Graphs: See your progress with many custom Graphs to suit your needs ▸ Nutrition Notes: Add notes for each workout to keep a track of your nutrition ▸ Photos: Periodically add your Workout Photos on each Rest day to measure the transformation! ▸ Progress Tracker: Log BMI, Weight, Heart Rate, Intensity, Workout Date & Time and many other variables ▸ Weight Support: US(lbs) and Metric(kg) weight support ▸ Workout Feed: Browse through your previous, current, future Workout Routines ▸ Special feature to instantly - view all Missed, Completed and Remaining Workouts. ▸ FitTest: Record All the Body Measurements on all the days required ▸ Body Measurements: Log body measurements on Rest days and check all results together ▸ Photo & Notes Feed: See all your Workout Pictures & Notes in a Feed. For extended features 21 Day Container Workout Fix Premium membership. Two different Premium Subscriptions (1, 12 months): 1 month cost $1.99 - Unlocks All features for a month 12 months cost $14.99 - Unlocks All features for a year Premium Subscription: The purchase will be charged to your iTunes account. The subscription will be auto-renewed 24 hours prior to it running out unless auto-renew is turned off from the User Settings in iTunes after purchasing. You can cancel the auto-renewing subscription from there at anytime. Terms and Privacy Policy: https://mehulblacksabbath.wixsite.com/website Our apps are continually growing, I will be adding new features with each update, if there is anything you would like to see in the next update, then please send a feature request or feedback from the app and I will be sure to include it!
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 Workout Fix at 4.1 against OptimalFit's 3.3. 21 Day Container Workout Fix also leads on monetization model (freemium vs subscription) and iOS requirement (12.0 vs 15.1). On price, ratings volume, update cadence 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
Both are free to download. 21 Day Container Workout Fix sells 2 in-app purchases, starting at $2.99 per month 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 Workout Fix holds the better App Store score, 4.1 against 3.3. Both are backed by a comparable volume of ratings — 45 and 16 respectively.
21 Day Container Workout Fix ships an update every 5 days, OptimalFit every 3 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | 21 Day Container Workout Fix | OptimalFit |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (45 ratings) — better | 3.3 (16 ratings) |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 45 — better | 16 |
| Update frequency | Every 5 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium — better | Subscription |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 49 MB | 64 MB |
| Age rating | 4+ | 17+ |
| Developer | Mehul Srivastava | Alex Borst |
In-app purchases
21 Day Container Workout Fix
- Monthly Subscription$2.991 Month
- Yearly Subscription$12.991 Year
OptimalFit
- OptimalFit Membership$19.951 Month
- OptimalFit$199.001 Year





