# ITR vs Volthium Smart

The clearest difference is device support: Volthium Smart at 3 against ITR's 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.

ITR ships an update every 2 months, Volthium Smart monthly. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ITR | Volthium Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/itr-oasis/id1438468041/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | — |
| Size | 20 MB | 44 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [International Thermal Research Ltd.](https://appshunter.io/developer/1496252759) | [Energie Volthium Inc](https://appshunter.io/developer/1522194366) |

## What reviewers say

### ITR

[App page](https://appshunter.io/ios/app/itr-oasis/id1438468041)

Remotely monitor and control your home's heating elements, including burners, electric elements, and engine preheat pumps. Manage your home's climate and ensure optimal performance from afar.

**Highlights:** Monitor heating elements, Control burners remotely, Manage electric elements, Operate engine preheat pump, Remote On/Off functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Volthium Smart

[App page](https://appshunter.io/ios/app/volthium-smart/id6689523265)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ITR free?

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

### Is Volthium Smart free?

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

### Do ITR or Volthium Smart have ads?

Neither ITR nor Volthium Smart shows ads.

### Which is updated more often, ITR or Volthium Smart?

ITR ships an update every 2 months, and Volthium Smart monthly. Most recently, ITR was updated on October 20, 2026 and Volthium Smart on October 7, 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.*