# Light Meter vs Libre Light Sensor

The clearest difference is review sentiment: Libre Light Sensor at 82% against Light Meter's 33%. Libre Light Sensor also leads on in-app purchases (none vs 4) and update cadence (every 5 weeks vs every 10 months). On price, ratings volume, 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. Libre Light Sensor asks for nothing beyond the download.

Libre Light Sensor holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 116 and 113 respectively. Written reviews point the same way: 33% of Light Meter's written reviews are positive against 82% of Libre Light Sensor's.

Light Meter ships an update every 10 months, Libre Light Sensor every 5 weeks. The most recent releases landed on September 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Light Meter | Libre Light Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (116 ratings)](https://appshunter.io/ios/app/light-meter-lux-525-pro/id1636117065/reviews) | **[4.8 (113 ratings)](https://appshunter.io/ios/app/libre-light-sensor/id1644439968/reviews)** |
| Number of ratings | **116** | 113 |
| Positive reviews | 33.3% of reviews | **82.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 1 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Ivankin](https://appshunter.io/developer/1615973131) | [John Harrington](https://appshunter.io/developer/1603002572) |

## 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 |


### Libre Light Sensor

[App page](https://appshunter.io/ios/app/libre-light-sensor/id1644439968)

Measure ambient light levels in Lux using your iPhone's camera. Optimize sleep quality by understanding light exposure throughout the day and night.

**Highlights:** Measure light in Lux, Utilizes iPhone camera, Optimize sleep quality, Track light exposure

**In-app purchases:** none


## Frequently asked questions

### Is Light Meter free?

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

### Is Libre Light Sensor free?

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

### Which has better reviews, Light Meter or Libre Light Sensor?

Libre Light Sensor is rated higher. Light Meter averages 4.5 out of 5 from 116 ratings, while Libre Light Sensor averages 4.8 from 113 ratings.

### Do Light Meter or Libre Light Sensor have ads?

Neither Light Meter nor Libre Light Sensor shows ads.

### Which is updated more often, Light Meter or Libre Light Sensor?

Light Meter ships an update every 10 months, and Libre Light Sensor every 5 weeks. Most recently, Light Meter was updated on September 12, 2026 and Libre Light Sensor on September 22, 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.*