206+ iOS apps curated and reviewed
Out of 206+ radiator size calculator apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Jul 2026 | |
| 2 |  | $1.99 | 4.8★ (4) | No | No | Aug 2026 | |
| 3 |  | Free was $0.99 | — | No | Yes | Sep 2026 | |
| 4 |  | Free was $1.99 | — | No | Yes | May 2026 | |
| 5 |  | Free | 4.5★ (126K) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 4.8★ (3.6K) | No | No | Sep 2026 | |
| 7 |  | Free | 4.7★ (13K) | Yes | Yes | Sep 2026 | |
| 8 |  | Free | 4.8★ (17K) | No | No | Sep 2026 |
Calculate the ideal radiator size and quantity for any room. Input room details like dimensions, glazing, and wall types to get precise recommendations. Save and email room specifications for later reference or client sharing.
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.
