Comparison

Units Free vs METechs SWCtrl

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Units Free

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
Read full description

Convert between many units from several categories and different unit systems (metric, imperial, ...). Features: - categories: length, temperature, capacity, weight, energy, power, pressure, area - access previous conversions from the history list - categories have different colors (in the history as well) - flip units - send calculations by email - support for the iPhone 6 and 6+ - support for the iPad multitasking (split view..) (Free version: requires upgrade to arbitrarily switch categories)

About

METechs SWCtrl

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
Read full description

With this app and METechs SWCtrl control switch, relay, smart plug, light..., you can control motorized curtain rods, motorized roller shade systems, tubular roller motors, electric locks, lights, appliances, and other automation devices from your device, anywhere Increase energy efficiency and personal security by automatically opening or closing curtains with timer functions or home automation. If you are enthusiastic about automation or lazy lifestyle, control them by a simple touch or voice command. It works with Amazon Alexa or Google Assistant voice control; if you prefer, you still can control these devices with physical touch switches. Either way, METechs provides a truly Automation Lifestyle for everyone! [Key Features] •Directly controlled by a smartphone, no hub required •Works with Amazon Alexa, Google Assistant, or voice control •Work independently with or without Wi-Fi •Can be controlled in local and remote modes •Timing control devices any time in any day, weekday, or weekend •Multiple devices control by each other with IF…THEN… logic •Look up log for who, when, and where the devices were operated •Easily shares with others via the built-in Wi-Fi hotspot Our app may not be perfect yet and still under development. Our teams are working hard and smart to continually improve the app. Email Support@METechs.com with questions and comments. Visit www.METechs.com to find it out more.

Screenshots

Units Free4 screens
METechs SWCtrl4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
Units Free versus METechs SWCtrl: the parameters behind the verdict, then further details
ParameterUnits FreeMETechs SWCtrl
PriceFreeFree
Rating1.0 (1 ratings)3.3 (4 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings14 — better
Update frequencyEvery 5 months — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS5.1.1 — better8.0
Further details — not scored
Size3 MB112 MB
Age rating4+4+
DeveloperPiet JonasMETECHS GLOBAL INC.

Customer experience

Units Free

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews15 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

METechs SWCtrl

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

Units Free

One-time1
  • Units Free Upgrade$0.99
None

METechs SWCtrl

No in-app purchases

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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