# NutrientOS vs Workout Tracker

The clearest difference is update cadence: Workout Tracker at every 3 days against NutrientOS's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. NutrientOS sells 2 in-app purchases, starting at $7.99 per month and Workout Tracker sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

NutrientOS ships an update fortnightly, Workout Tracker every 3 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | NutrientOS | Workout Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/nutrientos-calorie-tracker/id6765582312/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 184 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Jeremiyah Escobedo](https://appshunter.io/developer/1895999641) | [Atakan ER](https://appshunter.io/developer/1896467398) |

## What reviewers say

### NutrientOS

[App page](https://appshunter.io/ios/app/nutrientos-calorie-tracker/id6765582312)

Track your nutrition, understand your meals, and build healthier habits with food logging, macro and micronutrient tracking, and workout logging. Optional AI tools offer advanced guidance and insights for personalized wellness.

**Highlights:** Food diary with calories, macros, and micronutrients, Barcode and food search, Restaurant menu browsing, Fitness, hydration, and sleep tracking, AI meal scan, AI Coach for guidance, AI recipe builder

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Atlas Pro Monthly | $7.99 | per month |
| Atlas Premium Monthly | $12.99 | per month |


### Workout Tracker

[App page](https://appshunter.io/ios/app/workout-tracker-thymos/id6767354830)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| THYMOS Pro Monthly | $3.99 | per month |
| THYMOS Pro Yearly | $29.99 | per year |
| THYMOS Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is NutrientOS free?

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

### Is Workout Tracker free?

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

### Do NutrientOS or Workout Tracker have ads?

Neither NutrientOS nor Workout Tracker shows ads.

### Which is updated more often, NutrientOS or Workout Tracker?

NutrientOS ships an update fortnightly, and Workout Tracker every 3 days. Most recently, NutrientOS was updated on October 31, 2026 and Workout Tracker on October 25, 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.*