# Ark Nutrition vs System Lock

The clearest difference is iOS requirement: Ark Nutrition at 15.1 against System Lock's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Ark Nutrition sells 2 in-app purchases, starting at $4.99 per month and System Lock sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Ark Nutrition ships an update weekly, System Lock every 6 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Ark Nutrition | System Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ark-nutrition/id6759586296/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Freemium | — |
| Size | 52 MB | 89 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Belynx Labs](https://appshunter.io/developer/1879673382) | [Mark Angelo Atienza](https://appshunter.io/developer/1896323065) |

## What reviewers say

### Ark Nutrition

[App page](https://appshunter.io/ios/app/ark-nutrition/id6759586296)

Effortlessly track your nutrition with advanced AI. Log meals instantly using your camera, voice, or by scanning receipts and barcodes. Get personalized meal plans and track hydration and intermittent fasting.

**Highlights:** AI Photo Logging (Ark Lens), Hands-Free Voice Logging, Order & Receipt Scanner, Barcode & Label Scanner, Intermittent Fasting Tracker, Wearable Sync for Readiness Score

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Arkonix Elite Monthly | $4.99 | per month |
| Arkonix Elite Annual | $49.99 | per year |


### System Lock

[App page](https://appshunter.io/ios/app/system-lock-level-up-focus/id6766763868)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| System Lock Pro | $4.99 | per 7 days |
| System Lock Pro | $9.99 | per month |
| System Lock Pro | $19.99 | per year |
| System Lock Pro | $49.99 | per year |


## Frequently asked questions

### Is Ark Nutrition free?

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

### Is System Lock free?

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

### Do Ark Nutrition or System Lock have ads?

Neither Ark Nutrition nor System Lock shows ads.

### Which is updated more often, Ark Nutrition or System Lock?

Ark Nutrition ships an update weekly, and System Lock every 6 days. Most recently, Ark Nutrition was updated on November 9, 2026 and System Lock on November 5, 2026.

---

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