# Radiator Calculator Pro vs Phare Protect

The clearest difference is in-app purchases: Phare Protect at none against Radiator Calculator Pro's 1. Phare Protect also leads on update cadence (every 4 days vs every 3 months) and iOS requirement (15.1 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Radiator Calculator Pro sells 1 one-off in-app purchase. Phare Protect asks for nothing beyond the download.

Radiator Calculator Pro ships an update every 3 months, Phare Protect every 4 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Radiator Calculator Pro | Phare Protect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/phare-protect/id6762322989/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Paid | **Free** |
| Size | 16 MB | 39 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DigitalKind Ltd](https://appshunter.io/developer/1557937157) | [Phare Labs Inc](https://appshunter.io/developer/1890213422) |

## 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 |


### Phare Protect

[App page](https://appshunter.io/ios/app/phare-protect/id6762322989)

Monitor your home's safety with live, room-by-room insights from smart sensors. Get instant alerts for smoke, CO, air quality, and more, with 24-hour trend data and easy management of multiple properties.

**Highlights:** Room-by-room interactive floor plan, Real-time sensor readings (smoke, CO, air quality), 24-hour trend graphs, Instant push notifications for alerts, Manage multiple homes, Easy device setup

**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 Phare Protect free?

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

### Do Radiator Calculator Pro or Phare Protect have ads?

Neither Radiator Calculator Pro nor Phare Protect shows ads.

### Which is updated more often, Radiator Calculator Pro or Phare Protect?

Radiator Calculator Pro ships an update every 3 months, and Phare Protect every 4 days. Most recently, Radiator Calculator Pro was updated on October 28, 2026 and Phare Protect on October 28, 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.*