# Units Converter for Engineers vs DevScroll

The clearest difference is update cadence: Units Converter for Engineers at every 5 weeks against DevScroll's every 3 months. Units Converter for Engineers also leads on iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Units Converter for Engineers sells 2 one-off in-app purchases and DevScroll sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Units Converter for Engineers ships an update every 5 weeks, DevScroll every 3 months. The most recent releases landed on September 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Units Converter for Engineers | DevScroll |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/units-converter-for-engineers/id1018604081/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 91 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lucy Enterprises](https://appshunter.io/developer/1656612108) | [cynq ventures](https://appshunter.io/developer/1804133893) |

## What reviewers say

### Units Converter for Engineers

[App page](https://appshunter.io/ios/app/units-converter-for-engineers/id1018604081)

This tool allows professionals and students to convert units and currencies using dimensional analysis. It supports a vast number of unit combinations and includes physical constants. Currency rates are updated monthly.

**Highlights:** Free-form unit conversion via dimensional analysis, Supports over 300 single units, Supports over 165 currencies with automatic updates, Includes dozens of physical constants, Identifies unit mismatches, Glossary of available units

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $0.99 | one-time |
| Remove ads | $1.99 | one-time |


### DevScroll

[App page](https://appshunter.io/ios/app/devscroll-ship-to-unlock/id6756963284)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quick Commit | $0.99 | per 7 days |
| Sprint Mode | $2.99 | per month |
| Deep Work Mode | $12.99 | per year |
| Unlimited Unlock | $24.99 | one-time |


## Frequently asked questions

### Is Units Converter for Engineers free?

Units Converter for Engineers is free to download, with in-app purchases available.

### Is DevScroll free?

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

### Do Units Converter for Engineers or DevScroll have ads?

Neither Units Converter for Engineers nor DevScroll shows ads.

### Which is updated more often, Units Converter for Engineers or DevScroll?

Units Converter for Engineers ships an update every 5 weeks, and DevScroll every 3 months. Most recently, Units Converter for Engineers was updated on September 19, 2026 and DevScroll on October 9, 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.*