# Just Nod vs Arc Lock

The clearest difference is update cadence: Arc Lock at every 8 days against Just Nod's every 6 months. Arc Lock also leads on iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Just Nod ships an update every 6 months, Arc Lock every 8 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Just Nod | Arc Lock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 8 days** |
| Size | 26 MB | 7 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Speculative Dynamics Private Limited](https://appshunter.io/developer/1894009737) | [JUN HYUK CHOI](https://appshunter.io/developer/6821369444) |

## What reviewers say

### Just Nod

[App page](https://appshunter.io/ios/app/just-nod/id6762388689)

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

**In-app purchases:** none


### Arc Lock

[App page](https://appshunter.io/ios/app/arc-lock-app-blocker/id6822023409)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Just Nod free?

Just Nod is free to download, with no in-app purchases.

### Is Arc Lock free?

Arc Lock is free to download, with no in-app purchases.

### Do Just Nod or Arc Lock have ads?

Neither Just Nod nor Arc Lock shows ads.

### Which is updated more often, Just Nod or Arc Lock?

Just Nod ships an update every 6 months, and Arc Lock every 8 days. Most recently, Just Nod was updated on November 5, 2026 and Arc Lock 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.*