# Length Mass Speed Converter vs SelfScan

The clearest difference is in-app purchases: SelfScan at none against Length Mass Speed Converter's 1. SelfScan also leads on ads (none vs shown) and update cadence (fortnightly vs every 4 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Length Mass Speed Converter sells 1 in-app purchase, starting at $14.99 per month. SelfScan asks for nothing beyond the download.

Length Mass Speed Converter ships an update every 4 months, SelfScan fortnightly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Length Mass Speed Converter | SelfScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (14 ratings)](https://appshunter.io/ios/app/length-mass-speed-converter/id1421135749/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 6 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AR Code Pte. Ltd.](https://appshunter.io/developer/1761134422) | [SOCIETY FOR NATURAL LANGUAGE TECHNOLOGY RESEARCH](https://appshunter.io/developer/1616455204) |

## What reviewers say

### Length Mass Speed Converter

[App page](https://appshunter.io/ios/app/length-mass-speed-converter/id1421135749)

Easily convert between various units of measurement across 15 categories, including length, mass, volume, speed, and temperature. Offers a premium subscription for advanced features and an ad-free experience.

**Highlights:** Distance/length conversions, Area conversions, Volume conversions, Mass conversions, Speed conversions, Temperature conversions, 15 measurement categories

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Converter Premium | $14.99 | per month |


### SelfScan

[App page](https://appshunter.io/ios/app/selfscan/id1616455202)

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

**In-app purchases:** none


## Frequently asked questions

### Is Length Mass Speed Converter free?

Length Mass Speed Converter is free to download, with in-app purchases available.

### Is SelfScan free?

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

### Do Length Mass Speed Converter or SelfScan have ads?

Length Mass Speed Converter shows ads; SelfScan does not.

### Which is updated more often, Length Mass Speed Converter or SelfScan?

Length Mass Speed Converter ships an update every 4 months, and SelfScan fortnightly. Most recently, Length Mass Speed Converter was updated on October 24, 2026 and SelfScan on October 30, 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.*