# Wilo vs RadiatorOutput

The clearest difference is review sentiment: RadiatorOutput at 100% against Wilo's 66%. RadiatorOutput also leads on device support (4 vs 2) and iOS requirement (15.0 vs 18.6). Wilo's advantage is update cadence (every 3 weeks vs every 8 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Wilo ships an update every 3 weeks, RadiatorOutput every 8 months. The most recent releases landed on October 7, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Wilo | RadiatorOutput |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Free | Free |
| Size | 181 MB | 1 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [WILO SE](https://appshunter.io/developer/756670903) | [Sebastjan Valic](https://appshunter.io/developer/503687385) |

## What reviewers say

### Wilo

[App page](https://appshunter.io/ios/app/wilo-assistant/id397747214)

This app provides comprehensive support for planning, consulting, and installing pump technology. It offers tools for selecting replacement pumps, calculating energy savings, and diagnosing faults, even offline. Access detailed product information and control smart pumps.

**Highlights:** Smart pump control and settings, Interactive replacement pump recommendations, Energy savings and CO2 emission calculator, Pump dimensioning and selection, Fault signal diagnosis and remedies, Unit conversion tool, AR product scanner

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

**In-app purchases:** none


### RadiatorOutput

[App page](https://appshunter.io/ios/app/radiatoroutput/id503687382)

Calculate radiator heat output based on water and air temperatures. Ensure optimal energy efficiency and cost savings by selecting the correct radiator size for any heating system, including those with low water temperatures. Supports metric units and can also calculate cooling output for convectors and fan-coils.

**Highlights:** Calculate radiator heat output, Adjust for water and air temperatures, Optimize energy efficiency, Supports low water temperature systems, Calculate cooling output, Metric units only

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Wilo free?

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

### Is RadiatorOutput free?

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

### Do Wilo or RadiatorOutput have ads?

Neither Wilo nor RadiatorOutput shows ads.

### Which is updated more often, Wilo or RadiatorOutput?

Wilo ships an update every 3 weeks, and RadiatorOutput every 8 months. Most recently, Wilo was updated on October 7, 2026 and RadiatorOutput on September 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.*