iHeatLoss vs CK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iHeatLoss
This app assists plumbers and heating engineers in calculating the heat output needed for each room in a building. It accounts for fabric and ventilation heat loss, providing results in Watts and BTU to help select appropriate radiators. The app also tracks multiple rooms to estimate the total heating system requirement.
- Room-by-room heat loss calculation
- Fabric and ventilation loss inclusion
- Multiple room tracking
- Watts and BTU output display
- Reference data for temperature and air change
- Total heating output estimation
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Heatloss helps plumbers, heating engineers, and installers estimate the heat output required for each room in a building. Calculate fabric and ventilation heat loss using room dimensions, component areas, U-values, internal temperatures, external temperatures, and air-change rates. Each room’s result is shown in both Watts and BTU, helping you choose a radiator with an appropriate heat output. The app keeps track of every room in the project and provides a running total for the whole building, giving a clear estimate of the overall heat output required from the heating system or boiler. Features • Calculate room-by-room heat loss • Include fabric and ventilation losses • Track multiple rooms in one building • View totals in Watts and BTU • Use room temperature and air-change reference data • Estimate the total heating output required for the property
CK
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Control App for CK Tools MightyScope Inspection Camera
Screenshots
Verdict
The clearest difference is price: CK at Free against iHeatLoss's $5.99. CK also leads on iOS requirement (9.0 vs 17.6). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
CK is free to download; iHeatLoss costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iHeatLoss ships an update every 12 months, CK every 16 months. The most recent releases landed on October 23, 2026 and October 10, 2026 respectively.
| Parameter | iHeatLoss | CK |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 12 months — better | Every 16 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Navtech Software | CARL KAMMERLING INTERNATIONAL LIMITED |
In-app purchases
iHeatLoss
No in-app purchases
CK
No in-app purchases
