# i vs Libre Light Sensor

The clearest difference is update cadence: i at fortnightly against Libre Light Sensor's every 5 weeks. i also leads on device support (3 vs 1) and iOS requirement (10.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

i ships an update fortnightly, Libre Light Sensor every 5 weeks. The most recent releases landed on May 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | i | Libre Light Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (113 ratings)](https://appshunter.io/ios/app/libre-light-sensor/id1644439968/reviews)** |
| Number of ratings | — | **113** |
| Positive reviews | — | 82.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | — | Free |
| Size | 5 MB | 1 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Robo Electronics co., Ltd.](https://appshunter.io/developer/1232651973) | [John Harrington](https://appshunter.io/developer/1603002572) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-dothermometer/id1546064427)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 i free?

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

### Is Libre Light Sensor free?

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

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

Neither i nor Libre Light Sensor shows ads.

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

i ships an update fortnightly, and Libre Light Sensor every 5 weeks. Most recently, i was updated on May 16, 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.*