# Light Meter vs SRead Scanner

The clearest difference is in-app purchases: SRead Scanner at none against Light Meter's 4. SRead Scanner also leads on update cadence (every 10 days vs every 10 months). Light Meter's advantage is iOS requirement (15.5 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. Light Meter sells 4 in-app purchases, starting at $3.99 per month. SRead Scanner asks for nothing beyond the download.

Light Meter ships an update every 10 months, SRead Scanner every 10 days. The most recent releases landed on October 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Light Meter | SRead Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (116 ratings)](https://appshunter.io/ios/app/light-meter-lux-525-pro/id1636117065/reviews)** | — |
| Number of ratings | **116** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 1 MB |
| Requires iOS | **15.5** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Ivankin](https://appshunter.io/developer/1615973131) | [Benjamin Mercado Gallardo](https://appshunter.io/developer/1301062195) |

## What reviewers say

### Light Meter

[App page](https://appshunter.io/ios/app/light-meter-lux-525-pro/id1636117065)

This app functions as a precise and user-friendly light meter using your phone's built-in sensors. It measures illuminance, color temperature, PPFD/PAR, DLI, and luminous flux in real-time. It also includes a calculator for various illumination parameters and allows sharing or saving of measurements.

**Highlights:** Real-time illuminance measurement, Color temperature measurement, PPFD/PAR and DLI calculation, Built-in illumination calculator, Share and save measurements, No additional equipment needed

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Subscription | $3.99 | per month |
| Premium Monthly Subscription | $4.99 | per month |
| Premium Lifetime Subscription | $19.99 | one-time |
| Premium Lifetime Subscription | $29.99 | one-time |


### SRead Scanner

[App page](https://appshunter.io/ios/app/sread-scanner/id6761625739)

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

**In-app purchases:** none


## Frequently asked questions

### Is Light Meter free?

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

### Is SRead Scanner free?

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

### Do Light Meter or SRead Scanner have ads?

Neither Light Meter nor SRead Scanner shows ads.

### Which is updated more often, Light Meter or SRead Scanner?

Light Meter ships an update every 10 months, and SRead Scanner every 10 days. Most recently, Light Meter was updated on October 30, 2026 and SRead Scanner on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*