# Length vs m

The clearest difference is price: m at Free against Length's $1.99. m also leads on update cadence (every 2 months vs every 87 months). Length's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 17.0). On ads and device support there is nothing between them.

m is free to download; Length costs $1.99 up front. m sells 2 in-app purchases, starting at $4.99 per year. Length asks for nothing beyond the download.

Length ships an update every 87 months, m every 2 months. The most recent releases landed on November 2, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Length | m |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/m-ber/id6740215628/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 87 months | **Every 2 months** |
| Monetization | — | Subscription |
| Size | 8 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Kei Suefuji](https://appshunter.io/developer/1388335881) | [Lawrence Anthony Ware](https://appshunter.io/developer/1788973624) |

## What reviewers say

### Length

[App page](https://appshunter.io/ios/app/length-units-converter/id1445076856)

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

**In-app purchases:** none


### m

[App page](https://appshunter.io/ios/app/m-ber/id6740215628)

Transform your device into a professional sACN lighting fixture for stage, film, and art installations. Control screen brightness, intensity, and vibration using standard lighting protocols.

**Highlights:** sACN control for Universe and DMX Address, Real-time backlight brightness adjustment, IRGB 8-Bit fixture compatibility, 6 Channel Mode with flashlight intensity, Device vibration control, Intuitive interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 365 Days Access to m-BER app | $4.99 | per year |
| Access m-BER app Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Length free?

Length costs $1.99, with no in-app purchases.

### Is m free?

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

### Do Length or m have ads?

Neither Length nor m shows ads.

### Which is updated more often, Length or m?

Length ships an update every 87 months, and m every 2 months. Most recently, Length was updated on November 2, 2026 and m on October 19, 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.*