# SOSglasses vs CritiCalc

The clearest difference is in-app purchases: CritiCalc at none against SOSglasses's 1. CritiCalc also leads on update cadence (every 2 weeks vs every 2 months) and device support (4 vs 2). SOSglasses's advantage is iOS requirement (11.0 vs 15.6). On price and ads there is nothing between them.

Both are free to download. SOSglasses sells 1 one-off in-app purchase. CritiCalc asks for nothing beyond the download.

SOSglasses ships an update every 2 months, CritiCalc every 2 weeks. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | SOSglasses | CritiCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sosglasses/id997011622/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 53 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [WPTRNPT LTD.](https://appshunter.io/developer/997011621) | [Jason Richmond](https://appshunter.io/developer/1659125082) |

## What reviewers say

### SOSglasses

[App page](https://appshunter.io/ios/app/sosglasses/id997011622)

This app helps you read small text without your glasses. It uses augmented reality to enhance text readability in low light and bright sunlight, and offers zoom and photo capture features.

**Highlights:** Augmented reality for low light reading, Text enhancement in bright sunlight, Smooth zoom up to 15x, Photo capture for documentation, Invert text mode, Strain-free Sepia mode

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4 -almost- Magical Features | $0.99 | one-time |


### CritiCalc

[App page](https://appshunter.io/ios/app/criticalc/id1659125080)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SOSglasses free?

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

### Is CritiCalc free?

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

### Do SOSglasses or CritiCalc have ads?

Neither SOSglasses nor CritiCalc shows ads.

### Which is updated more often, SOSglasses or CritiCalc?

SOSglasses ships an update every 2 months, and CritiCalc every 2 weeks. Most recently, SOSglasses was updated on October 18, 2026 and CritiCalc on October 17, 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.*