# NutrientOS vs Massiv

The clearest difference is update cadence: Massiv at every 6 days against NutrientOS's fortnightly. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. NutrientOS sells 2 in-app purchases, starting at $7.99 per month and Massiv sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for NutrientOS against 5.0 for Massiv. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

NutrientOS ships an update fortnightly, Massiv every 6 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NutrientOS | Massiv |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/nutrientos-calorie-tracker/id6765582312/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/massiv-gym-workout-tracker/id6776434661/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 22 MB | 135 MB |
| Requires iOS | **15.0** | 16.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Jeremiyah Escobedo](https://appshunter.io/developer/1895999641) | [Aristocoded LLC](https://appshunter.io/developer/6776434663) |

## 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 |


### Massiv

[App page](https://appshunter.io/ios/app/massiv-gym-workout-tracker/id6776434661)

Log your weightlifting sessions quickly with 17 built-in programs and transparent progression. Track barbell and dumbbell lifts, manage supersets, and utilize an Apple Watch companion for wrist logging. Offers advanced features like custom program building and cloud backups with a Pro subscription.

**Highlights:** 17 built-in lifting programs, Fast workout logging, Superset & Drop Set logging, Apple Watch companion, Plate calculator, CSV and JSON export, Custom program builder (Pro)

**Features:** Family Sharing, Apple Watch app, iMessage stickers

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Massiv Pro Monthly | $4.99 | per month |
| Massiv Pro Annual | $29.99 | per year |
| Massiv Pro Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is NutrientOS free?

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

### Is Massiv free?

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

### Which has better reviews, NutrientOS or Massiv?

NutrientOS and Massiv are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do NutrientOS or Massiv have ads?

Neither NutrientOS nor Massiv shows ads.

### Which is updated more often, NutrientOS or Massiv?

NutrientOS ships an update fortnightly, and Massiv every 6 days. Most recently, NutrientOS was updated on November 5, 2026 and Massiv on October 31, 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.*