# i vs Light Meter.

The clearest difference is in-app purchases: i at none against Light Meter.'s 1. i also leads on update cadence (fortnightly vs every 6 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

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

i ships an update fortnightly, Light Meter. every 6 weeks. The most recent releases landed on October 27, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | i | Light Meter. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Size | 5 MB | 1 MB |
| Requires iOS | **10.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Robo Electronics co., Ltd.](https://appshunter.io/developer/1232651973) | [Muhammed Efdal incesu](https://appshunter.io/developer/1748859357) |

## What reviewers say

### i

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Light Meter.

[App page](https://appshunter.io/ios/app/light-meter/id6651860748)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Light Meter Lifetime Premium | $2.99 | one-time |


## Frequently asked questions

### Is i free?

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

### Is Light Meter. free?

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

### Do i or Light Meter. have ads?

Neither i nor Light Meter. shows ads.

### Which is updated more often, i or Light Meter.?

i ships an update fortnightly, and Light Meter. every 6 weeks. Most recently, i was updated on October 27, 2026 and Light Meter. on October 17, 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.*