# NoStim vs Arc Lock

The clearest difference is in-app purchases: Arc Lock at none against NoStim's 8. NoStim's advantage is update cadence (every 3 days vs every 8 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. NoStim sells 8 in-app purchases, starting at $2.99 per month. Arc Lock asks for nothing beyond the download.

NoStim ships an update every 3 days, Arc Lock every 8 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NoStim | Arc Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/nostim-screen-time/id6796369722/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 8 days |
| Monetization | Freemium | — |
| Size | 11 MB | 7 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [William Lawrence](https://appshunter.io/developer/6791693896) | [JUN HYUK CHOI](https://appshunter.io/developer/6821369444) |

## What reviewers say

### NoStim

[App page](https://appshunter.io/ios/app/nostim-screen-time/id6796369722)

This app helps you regain control of your digital life by removing addictive elements from social media and video platforms. It offers customizable blocking features, scheduled modes, and a unique 'ratchet' system to gradually reduce usage without feeling overly restrictive.

**Highlights:** Removes addictive features from social media, Customizable blocking and limits, Scheduled modes for focus, Driving Mode for safe usage, Optional 'ratchet' system for gradual reduction, Comfort and Vacation modes, Optional shared accountability circles

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NoStim Pro (Monthly) | $2.99 | per month |
| NoStim Pro (Yearly) | $19.99 | per year |
| Tip the developer | $0.99 | one-time |
| Tip the developer | $4.99 | one-time |
| Tip the developer | $9.99 | one-time |
| Tip the developer | $14.99 | one-time |
| Tip the developer | $19.99 | one-time |
| NoStim Pro — Forever | $39.99 | one-time |


### 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 NoStim free?

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

### Is Arc Lock free?

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

### Do NoStim or Arc Lock have ads?

Neither NoStim nor Arc Lock shows ads.

### Which is updated more often, NoStim or Arc Lock?

NoStim ships an update every 3 days, and Arc Lock every 8 days. Most recently, NoStim was updated on November 8, 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.*