# IO network vs BTU Radiator Calculator

The clearest difference is price: IO network at Free against BTU Radiator Calculator's $0.99. IO network also leads on iOS requirement (7.0 vs 26.0). BTU Radiator Calculator's advantage is update cadence (every 3 weeks vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

IO network is free to download; BTU Radiator Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

IO network ships an update every 4 months, BTU Radiator Calculator every 3 weeks. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | IO network | BTU Radiator Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/io-network/id687317807/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 1 MB |
| Requires iOS | **7.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Devantech Ltd.](https://appshunter.io/developer/601306747) | [Plan CD](https://appshunter.io/developer/309570233) |

## What reviewers say

### IO network

[App page](https://appshunter.io/ios/app/io-network/id687317807)

Control multiple Wi-Fi and Ethernet devices from a central app. Customize names for easy identification of modules and their I/Os. Access a detailed manual for comprehensive guidance.

**Highlights:** Control Wi-Fi and Ethernet devices, Supports any number of devices, Customizable module and I/O names, Easy device identification, Access to detailed manual

**Features:** macOS Compatibility

**In-app purchases:** none


### BTU Radiator Calculator

[App page](https://appshunter.io/ios/app/btu-radiator-calculator/id1441620006)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is IO network free?

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

### Is BTU Radiator Calculator free?

BTU Radiator Calculator costs $0.99, with no in-app purchases.

### Do IO network or BTU Radiator Calculator have ads?

Neither IO network nor BTU Radiator Calculator shows ads.

### Which is updated more often, IO network or BTU Radiator Calculator?

IO network ships an update every 4 months, and BTU Radiator Calculator every 3 weeks. Most recently, IO network was updated on October 23, 2026 and BTU Radiator Calculator on October 26, 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.*