# Plant Light Meter vs Libre Light Sensor

The clearest difference is review sentiment: Libre Light Sensor at 82% against Plant Light Meter's 0%. Libre Light Sensor also leads on rating (4.8 vs 1.7) and in-app purchases (none vs 1). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Plant Light Meter sells 1 one-off in-app purchase. Libre Light Sensor asks for nothing beyond the download.

Libre Light Sensor holds the better App Store score, 4.8 against 1.7. That said, the two scores are not equally well evidenced: Libre Light Sensor has 113 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 0% of Plant Light Meter's written reviews are positive against 82% of Libre Light Sensor's.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Plant Light Meter | Libre Light Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.7 (11 ratings)](https://appshunter.io/ios/app/plant-light-meter-lux-and-ppfd/id1628111038/reviews) | **[4.8 (113 ratings)](https://appshunter.io/ios/app/libre-light-sensor/id1644439968/reviews)** |
| Number of ratings | 11 | **113** |
| Positive reviews | 0.0% of reviews | **82.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 34 MB | 1 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kurtulus Ahmet TEMEL](https://appshunter.io/developer/1531511394) | [John Harrington](https://appshunter.io/developer/1603002572) |

## What reviewers say

### Plant Light Meter

[App page](https://appshunter.io/ios/app/plant-light-meter-lux-and-ppfd/id1628111038)

This app helps indoor plant owners determine if their plants are receiving adequate light. It uses your device's camera to measure light intensity in Lux and Foot Candle units, offering plant recommendations based on your readings. Track light changes over time and optimize plant placement for healthier growth.

**Highlights:** Measures light in Lux and Foot Candle, Plant recommendations based on light levels, Manual and continuous measurement modes, Save and export measurement data, Visual light category indicators, Front and rear camera support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Life Time Premium | $2.99 | 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 Plant Light Meter free?

Plant 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, Plant Light Meter or Libre Light Sensor?

Libre Light Sensor is rated higher. Plant Light Meter averages 1.7 out of 5 from 11 ratings, while Libre Light Sensor averages 4.8 from 113 ratings.

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

Plant Light Meter shows ads; Libre Light Sensor does not.

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

Plant Light Meter ships an update every 5 weeks, and Libre Light Sensor every 5 weeks. Most recently, Plant Light Meter was updated on September 18, 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.*