Radiator Calculator Pro is a utility for heating engineers and homeowners to calculate room-specific heat loss and radiator sizing on iOS.
The App DNA
What makes this app unique?
The app removes the manual complexity of EN 442-compliant calculations for low-temperature heat-pump systems, which are increasingly common in modern renovations.
For Plumbers, heating engineers, heat-pump installers, and homeowners managing renovation projects.
What does it look like?
Key features
Calculates radiator output for low-temperature systems using ΔT35 or ΔT30 settings to account for lower flow temperatures.
Calculates room heat requirements by factoring insulation levels, glazing, external wall count, and floor/roof exposure.
Provides 8 room-type presets including garage, conservatory, and bathroom to automate standard heat-loss variables.
How much does it cost?
Radiator Calculator Pro is currently free with no identified in-app purchase or subscription gates, limiting immediate monetization but potentially driving user acquisition among trade professionals.
Velocity
Maintenance developmentperformanceopaqueShow more...
Radiator Calculator Pro currently operates on a maintenance cadence, with only one release shipped in the last 96 days. The latest version provides only generic performance and stability improvements, indicating a lack of new feature development. Development appears stable but minimal, with no evidence of active live-ops or content updates. The app has remained unchanged for over three months.
Who built it?
DigitalKind
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WordUp!User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Radiator Calculator Pro
How's the Utilities market?
Radiator Calculator Pro occupies a niche utility space for heating professionals, currently maintaining a 4+ content rating on iOS. The lack of recent major updates suggests a stable, maintenance-focused position rather than an aggressive growth play.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Radiator Calculator Pro
Where is it heading?
The market for heating-utility tools is shifting toward integrated professional suites that handle both sizing and material procurement. Radiator Calculator Pro remains a stable, single-purpose tool, but its lack of feature expansion leaves it exposed to generalist competitors that may soon replicate its heat-pump sizing logic.
- The 14-week update cadence indicates a maintenance-only posture, which limits the app's ability to respond to changing heat-pump installation standards.
- The inclusion of ΔT35 and ΔT30 sizing modes aligns with the industry shift toward low-temperature systems, providing a durable technical moat.
The SWOT
- Heat-pump sizing modes provide technical differentiation for low-temperature system installers.
- Multi-factor heat loss analysis automates complex EN 442-compliant calculations.
- Integration of direct-to-supplier quote requests could monetize the free user base.
- Expansion into automated bill-of-materials generation would increase professional value.
Next best moves
Ship project-sharing features because the current manual export limits multi-user trade workflows → increase professional retention
The counter-intuitive read
The lack of monetization is a strategic risk: by remaining free…
Read the full takeSince the last report: The app's competitive assessment shifted from viewing its free, maintenance-only status as a neutral acquisition tool to identifying it as a strategic risk that undermines professional credibility. No functional product changes occurred, as the app remains in a 96-day maintenance cycle.
Bottom line
Radiator Calculator Pro provides a specialized utility for heat-pump installers, but the lack of active development risks stagnation against broader construction tools. Prioritizing project-export features would increase professional stickiness and justify a move toward a freemium model.
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Access the full report for freeFAQ
Is Radiator Calculator Pro suitable for professional heating engineers?
Does Radiator Calculator Pro charge a subscription fee?
What is the difference between this and a standard radiator calculator?
Sources
- [1] App Store, source
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