# OJ Microline® UWG4 vs ArchSA

The clearest difference is update cadence: ArchSA at every 3 months against OJ Microline® UWG4's every 6 months. ArchSA also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

OJ Microline® UWG4 ships an update every 6 months, ArchSA every 3 months. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | OJ Microline® UWG4 | ArchSA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (33 ratings)](https://appshunter.io/ios/app/oj-microline-uwg4/id1046778776/reviews)** | — |
| Number of ratings | **33** | — |
| Positive reviews | 23.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 13 MB | 85 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OJ ELECTRONICS AS](https://appshunter.io/developer/1326069502) | [James Del Rio](https://appshunter.io/developer/510232888) |

## 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


### ArchSA

[App page](https://appshunter.io/ios/app/archsa/id1537283464)

**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 ArchSA free?

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

### Do OJ Microline® UWG4 or ArchSA have ads?

Neither OJ Microline® UWG4 nor ArchSA shows ads.

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

OJ Microline® UWG4 ships an update every 6 months, and ArchSA every 3 months. Most recently, OJ Microline® UWG4 was updated on October 21, 2026 and ArchSA on October 18, 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.*