# OJ Microline® UWG4 vs SmarTouch Digital

OJ Microline® UWG4 and SmarTouch Digital both sit at 2.1 stars, but that hides the real split: 32% of SmarTouch Digital's written reviews are positive against 23% of OJ Microline® UWG4's. SmarTouch Digital also leads on iOS requirement (12.0 vs 15.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 2.1 for OJ Microline® UWG4 against 2.3 for SmarTouch Digital. Both are backed by a comparable volume of ratings — 26 and 36 respectively. Written reviews are what separate them: 23% of OJ Microline® UWG4's written reviews are positive against 32% of SmarTouch Digital's.

OJ Microline® UWG4 ships an update every 6 months, SmarTouch Digital every 7 months. The most recent releases landed on July 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | OJ Microline® UWG4 | SmarTouch Digital |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (26 ratings)](https://appshunter.io/ios/app/oj-microline-uwg4/id1046778776/reviews) | **[2.3 (36 ratings)](https://appshunter.io/ios/app/smartouch-digital/id1523914512/reviews)** |
| Number of ratings | 26 | **36** |
| Positive reviews | 23.1% of reviews | **31.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 13 MB | 13 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OJ ELECTRONICS AS](https://appshunter.io/developer/1326069502) | [American Concepts](https://appshunter.io/developer/1537842009) |

## What reviewers say

### OJ Microline® UWG4

[App page](https://appshunter.io/ios/app/oj-microline-uwg4/id1046778776)

Remotely control your home heating system from any location. View and set temperatures, adjust heating schedules, activate vacation mode, and monitor energy consumption. Ensure comfort and maximize savings with intuitive thermostat management.

**Highlights:** Remote temperature control, Heating schedule management, Vacation mode activation, Energy consumption monitoring, Access multiple thermostats, Set US or Metric units

**In-app purchases:** none


### SmarTouch Digital

[App page](https://appshunter.io/ios/app/smartouch-digital/id1523914512)

Control your spa's temperature, filtration, and other settings remotely via Bluetooth or WiFi. Schedule operations based on time of day and share access with others.

**Highlights:** Bluetooth and WiFi connectivity, Temperature settings, Time-of-day scheduling, Filtration control, Share spa connection

**In-app purchases:** none


## Frequently asked questions

### Is OJ Microline® UWG4 free?

OJ Microline® UWG4 is free to download, with no in-app purchases.

### Is SmarTouch Digital free?

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

### Which has better reviews, OJ Microline® UWG4 or SmarTouch Digital?

SmarTouch Digital is rated higher. OJ Microline® UWG4 averages 2.1 out of 5 from 26 ratings, while SmarTouch Digital averages 2.3 from 36 ratings.

### Do OJ Microline® UWG4 or SmarTouch Digital have ads?

Neither OJ Microline® UWG4 nor SmarTouch Digital shows ads.

### Which is updated more often, OJ Microline® UWG4 or SmarTouch Digital?

OJ Microline® UWG4 ships an update every 6 months, and SmarTouch Digital every 7 months. Most recently, OJ Microline® UWG4 was updated on July 24, 2026 and SmarTouch Digital on September 23, 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.*