# OpticsRE vs Unitopia

The clearest difference is review sentiment: Unitopia at 100% against OpticsRE's 8%. Unitopia also leads on rating (5.0 vs 1.6). OpticsRE's advantage is ratings volume (38 vs 2) and device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Unitopia holds the better App Store score, 5.0 against 1.6. That said, the two scores are not equally well evidenced: OpticsRE has 38 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 8% of OpticsRE's written reviews are positive against 100% of Unitopia's.

OpticsRE ships an update every 7 months, Unitopia every 5 months. The most recent releases landed on September 20, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | OpticsRE | Unitopia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (38 ratings)](https://appshunter.io/ios/app/opticsre/id1624617287/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/unitopia/id6448568846/reviews)** |
| Number of ratings | **38** | 2 |
| Positive reviews | 8.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 20 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alpha Technologies, Inc.](https://appshunter.io/developer/1123884269) | [Justin Hold](https://appshunter.io/developer/1684990064) |

## What reviewers say

### OpticsRE

[App page](https://appshunter.io/ios/app/opticsre/id1624617287)

Monitor and control OutBack power conversion systems remotely. View energy use, production, and historical data. Receive email and mobile notifications for alerts and system events.

**Highlights:** Connect with OutBack devices, View energy use and production, Access historical performance data, Receive email notifications, Remote control access, Eliminate site visits

**In-app purchases:** none


### Unitopia

[App page](https://appshunter.io/ios/app/unitopia/id6448568846)

This utility app simplifies unit conversions with an extensive database and an intuitive interface. It offers scientific precision for everyday tasks and professional applications, even working offline.

**Highlights:** Effortless unit conversion, Extensive unit database, Intuitive user interface, Scientific precision, Offline functionality, Global compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OpticsRE free?

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

### Is Unitopia free?

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

### Which has better reviews, OpticsRE or Unitopia?

Unitopia is rated higher. OpticsRE averages 1.6 out of 5 from 38 ratings, while Unitopia averages 5.0 from 2 ratings.

### Do OpticsRE or Unitopia have ads?

Neither OpticsRE nor Unitopia shows ads.

### Which is updated more often, OpticsRE or Unitopia?

OpticsRE ships an update every 7 months, and Unitopia every 5 months. Most recently, OpticsRE was updated on September 20, 2026 and Unitopia on June 1, 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.*