# Radiator Calculator Pro vs Noise Diary

The clearest difference is price: Radiator Calculator Pro at Free against Noise Diary's $0.99. Noise Diary's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 3 months). On ads and device support there is nothing between them.

Radiator Calculator Pro is free to download; Noise Diary costs $0.99 up front. Radiator Calculator Pro sells 1 one-off in-app purchase. Noise Diary asks for nothing beyond the download.

Radiator Calculator Pro ships an update every 3 months, Noise Diary weekly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Radiator Calculator Pro | Noise Diary |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | — |
| Size | 16 MB | 25 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DigitalKind Ltd](https://appshunter.io/developer/1557937157) | [Christopher Lamb](https://appshunter.io/developer/1484679049) |

## What reviewers say

### Radiator Calculator Pro

[App page](https://appshunter.io/ios/app/radiator-calculator-pro/id6743349772)

Accurately calculate the heating requirements for any room in your home. This tool supports unlimited rooms, offers precise calculations in Watts and BTU, and features a clean, intuitive design with dark mode support.

**Highlights:** Calculate heating requirements, Support for all room types, Precise Watts and BTU output, Unlimited room saving, Intuitive user interface, Dark mode support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radiator Calculator PRO | $3.99 | one-time |


### Noise Diary

[App page](https://appshunter.io/ios/app/noise-diary/id6747617668)

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

**In-app purchases:** none


## Frequently asked questions

### Is Radiator Calculator Pro free?

Radiator Calculator Pro is free to download, with in-app purchases available.

### Is Noise Diary free?

Noise Diary costs $0.99, with no in-app purchases.

### Do Radiator Calculator Pro or Noise Diary have ads?

Neither Radiator Calculator Pro nor Noise Diary shows ads.

### Which is updated more often, Radiator Calculator Pro or Noise Diary?

Radiator Calculator Pro ships an update every 3 months, and Noise Diary weekly. Most recently, Radiator Calculator Pro was updated on November 4, 2026 and Noise Diary on November 5, 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.*