# 21 Day Container Tracker vs OptimalFit

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.

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.

## The numbers

| Metric | 21 Day Container Tracker | OptimalFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (511 ratings)](https://appshunter.io/ios/app/21-day-container-tracker/id994287813/reviews)** | [3.3 (16 ratings)](https://appshunter.io/ios/app/optimalfit/id6754051624/reviews) |
| Number of ratings | **511** | 16 |
| Positive reviews | 74.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Subscription | Subscription |
| Size | 45 MB | 64 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Cube Software Solutions Inc.](https://appshunter.io/developer/994287812) | [Alex Borst](https://appshunter.io/developer/1846477583) |

## What reviewers say

### 21 Day Container Tracker

[App page](https://appshunter.io/ios/app/21-day-container-tracker/id994287813)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 21 Day Tracker Weekly | $4.99 | per 7 days |
| 21 Day Container Tracker Pro | $29.99 | per year |
| 21 Day Tracker Annual Pro | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 📊 Helpful for tracking progress
- 🔍 Comprehensive food lists
- 🗓️ Convenient for daily tracking
- 💪 Supports various fitness programs

**What reviewers complain about**

- 💰 Paid subscription required
- 🔁 Resets data after each cycle
- 🚫 Limited customization options
- 📋 Lacks detailed food logging
- 🔔 Needs more notifications/reminders

**Reported bugs**

- Data loss when switching between cycles
- Compatibility issues with older devices
- Inconsistent container tracking behavior

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/optimalfit/id6754051624)

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.

**Highlights:** Customized resistance-training workouts, Personalized nutrition guidance, AI-powered coaching, Progress tracking, Adaptive to user needs, Body composition improvements

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OptimalFit Membership | $19.95 | per month |
| OptimalFit | $199.00 | per year |


## Frequently asked questions

### Is 21 Day Container Tracker free?

21 Day Container Tracker is free to download, with in-app purchases available.

### Is OptimalFit free?

OptimalFit is free to download, with in-app purchases available.

### Which has better reviews, 21 Day Container Tracker or OptimalFit?

21 Day Container Tracker is rated higher. 21 Day Container Tracker averages 4.7 out of 5 from 511 ratings, while OptimalFit averages 3.3 from 16 ratings.

### Do 21 Day Container Tracker or OptimalFit have ads?

Neither 21 Day Container Tracker nor OptimalFit shows ads.

### Which is updated more often, 21 Day Container Tracker or OptimalFit?

21 Day Container Tracker ships an update every 3 weeks, and OptimalFit every 3 days. Most recently, 21 Day Container Tracker was updated on November 6, 2026 and OptimalFit on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*