# Light Detector vs Zuzanka

The clearest difference is in-app purchases: Light Detector at none against Zuzanka's 4. Light Detector also leads on ratings volume (8 vs 2) and iOS requirement (7.0 vs 12.0). Zuzanka's advantage is update cadence (fortnightly vs every 12 months) and review sentiment (100% vs 82%). On price, rating, ads and device support there is nothing between them.

Both are free to download. Zuzanka sells 4 in-app purchases, starting at $5.00 per month. Light Detector asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.5 for Light Detector against 4.5 for Zuzanka. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews are what separate them: 82% of Light Detector's written reviews are positive against 100% of Zuzanka's.

Light Detector ships an update every 12 months, Zuzanka fortnightly. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Light Detector | Zuzanka |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (8 ratings)](https://appshunter.io/ios/app/light-detector/id420929143/reviews) | [4.5 (2 ratings)](https://appshunter.io/ios/app/zuzanka/id6444279925/reviews) |
| Number of ratings | **8** | 2 |
| Positive reviews | 81.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 159 MB |
| Requires iOS | **7.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Retina Italia Onlus](https://appshunter.io/developer/1450163371) | [Zatoichi Sp. z o.o.](https://appshunter.io/developer/1638968049) |

## What reviewers say

### Light Detector

[App page](https://appshunter.io/ios/app/light-detector/id420929143)

This utility app converts light intensity into sound, allowing users to perceive their surroundings through audio cues. Point your device's camera at any light source to hear variations in pitch based on brightness. It's designed to assist users, particularly those who are blind, in navigating and understanding their environment.

**Highlights:** Converts light to sound, Adjusts sound pitch by light intensity, Assists visually impaired users, Easy to use camera interface, Portable environmental awareness tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Zuzanka

[App page](https://appshunter.io/ios/app/zuzanka/id6444279925)

This app scans expiry dates, barcodes, and QR codes on food products. It converts expiry dates to text, offers product information, and supports visually impaired users with features like guiding sounds and voice output. Keep your kitchen organized and your food fresh.

**Highlights:** Expiry date scanning with guiding sounds, Barcode and QR code scanning, Product information lookup, Customizable contrast and voice output, Export scanned data, OCR feature for text recognition

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Product scanning - Monthly | $5.00 | per month |
| Product scanning - 6 mos. | $20.00 | per 6 months |
| Product scanning - Annual | $35.00 | per year |
| Product scanning - Lifetime | $79.00 | one-time |


## Frequently asked questions

### Is Light Detector free?

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

### Is Zuzanka free?

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

### Which has better reviews, Light Detector or Zuzanka?

Light Detector and Zuzanka are both rated 4.5 out of 5 on the App Store, from 8 and 2 ratings respectively.

### Do Light Detector or Zuzanka have ads?

Neither Light Detector nor Zuzanka shows ads.

### Which is updated more often, Light Detector or Zuzanka?

Light Detector ships an update every 12 months, and Zuzanka fortnightly. Most recently, Light Detector was updated on October 17, 2026 and Zuzanka on October 8, 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.*