# Units Free vs METechs SWCtrl

The clearest difference is rating: METechs SWCtrl at 3.3 against Units Free's 1.0. METechs SWCtrl also leads on in-app purchases (none vs 1) and ratings volume (4 vs 1). Units Free's advantage is iOS requirement (5.1.1 vs 8.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Units Free sells 1 one-off in-app purchase. METechs SWCtrl asks for nothing beyond the download.

METechs SWCtrl holds the better App Store score, 3.3 against 1.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Units Free ships an update every 5 months, METechs SWCtrl every 7 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Units Free | METechs SWCtrl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/units-free/id510615778/reviews) | **[3.3 (4 ratings)](https://appshunter.io/ios/app/metechs-swctrl/id1459062245/reviews)** |
| Number of ratings | 1 | **4** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 112 MB |
| Requires iOS | **5.1.1** | 8.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [METECHS GLOBAL INC.](https://appshunter.io/developer/1131129156) |

## What reviewers say

### Units Free

[App page](https://appshunter.io/ios/app/units-free/id510615778)

Easily convert between various units across multiple categories like length, temperature, and weight. Access past conversions through a history list and send calculations via email. This free version offers core functionality with an option to upgrade for full category access.

**Highlights:** Multiple unit categories (length, temp, weight, etc.), Metric and imperial system support, Conversion history list, Send calculations via email, iPad multitasking support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Units Free Upgrade | $0.99 | one-time |


### METechs SWCtrl

[App page](https://appshunter.io/ios/app/metechs-swctrl/id1459062245)

Control motorized curtains, lights, and other automation devices remotely or with voice commands. Schedule actions for energy efficiency and convenience, and monitor device activity.

**Highlights:** Direct smartphone control, no hub needed, Voice control with Alexa and Google Assistant, Local and remote control, Timing and scheduling functions, Inter-device logic control, Operation logs, Wi-Fi hotspot sharing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Units Free free?

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

### Is METechs SWCtrl free?

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

### Which has better reviews, Units Free or METechs SWCtrl?

METechs SWCtrl is rated higher. Units Free averages 1.0 out of 5 from 1 ratings, while METechs SWCtrl averages 3.3 from 4 ratings.

### Do Units Free or METechs SWCtrl have ads?

Neither Units Free nor METechs SWCtrl shows ads.

### Which is updated more often, Units Free or METechs SWCtrl?

Units Free ships an update every 5 months, and METechs SWCtrl every 7 months. Most recently, Units Free was updated on October 24, 2026 and METechs SWCtrl on October 24, 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.*