# SLAB vs NutrientOS

SLAB and NutrientOS are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. SLAB sells 2 in-app purchases, starting at $6.99 per month and NutrientOS sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 31, 2026.

## The numbers

| Metric | SLAB | NutrientOS |
| --- | --- | --- |
| 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 | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 54 MB | 22 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Andrew Lower](https://appshunter.io/developer/1872896802) | [Jeremiyah Escobedo](https://appshunter.io/developer/1895999641) |

## What reviewers say

### SLAB

[App page](https://appshunter.io/ios/app/slab-voice-workout-log/id6758428852)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SLAB Pro - Monthly | $6.99 | per month |
| SLAB Pro - Yearly | $49.99 | per year |


### 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 |


## Frequently asked questions

### Is SLAB free?

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

### Is NutrientOS free?

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

### Do SLAB or NutrientOS have ads?

Neither SLAB nor NutrientOS shows ads.

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

SLAB ships an update fortnightly, and NutrientOS fortnightly. Most recently, SLAB was updated on October 31, 2026 and NutrientOS 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.*