# Optical Simulator vs AtomicGuard

The clearest difference is in-app purchases: Optical Simulator at none against AtomicGuard's 3. Optical Simulator also leads on iOS requirement (11.0 vs 15.0). AtomicGuard's advantage is update cadence (every 10 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. AtomicGuard sells 3 in-app purchases, starting at $11.99 per 7 days. Optical Simulator asks for nothing beyond the download.

Optical Simulator ships an update every 4 months, AtomicGuard every 10 days. The most recent releases landed on September 29, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Optical Simulator | AtomicGuard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/atomicguard/id6503954778/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 82 MB | 32 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Treeview Studio SAS](https://appshunter.io/developer/1171912639) | [ONEIRIC HUB LTD](https://appshunter.io/developer/1750522036) |

## What reviewers say

### Optical Simulator

[App page](https://appshunter.io/ios/app/optical-simulator/id1536399422)

**Features:** macOS Compatibility

**In-app purchases:** none


### AtomicGuard

[App page](https://appshunter.io/ios/app/atomicguard/id6503954778)

Enhance your online experience with powerful ad-blocking and robust security features. Protect your data from trackers and hackers, enjoy faster browsing, and maintain your privacy with a simple, one-click setup. A free version is available, with premium subscriptions offering full access to all protection features.

**Highlights:** Maximum protection from hackers and trackers, Ad-free and fast internet browsing, Privacy-focused data security, Improved device performance, One-click setup for instant protection, Free version available

**Features:** Safari Extension

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week Premium - AtomicGuard | $11.99 | per 7 days |
| Month Premium - AtomicGuard | $39.99 | per month |
| Annual Premium - AtomicGuard | $99.99 | per year |


## Frequently asked questions

### Is Optical Simulator free?

Optical Simulator is free to download, with no in-app purchases.

### Is AtomicGuard free?

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

### Do Optical Simulator or AtomicGuard have ads?

Neither Optical Simulator nor AtomicGuard shows ads.

### Which is updated more often, Optical Simulator or AtomicGuard?

Optical Simulator ships an update every 4 months, and AtomicGuard every 10 days. Most recently, Optical Simulator was updated on September 29, 2026 and AtomicGuard on September 23, 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.*