Refrigerant Charge Calculator is a specialized utility for HVAC technicians that provides offline superheat and subcooling charge verdicts on iOS.
The App DNA
What makes this app unique?
Technicians require rapid, reliable calculations in connectivity-dead zones like mechanical rooms and attics, where cloud-dependent tools fail.
For Residential and light-commercial HVAC service technicians, refrigeration techs, and apprentices.
What does it look like?
Key features
Performs all refrigerant calculations locally without network dependency, ensuring utility in basements and attics.
Provides immediate Add, Hold, or Remove instructions based on superheat or subcooling inputs.
Exports readings and notes into formatted PDFs for client or manager sharing.
How much does it cost?
The app is currently offered as a free utility with no visible monetization gates or subscription tiers.
Velocity
Maintenance developmentopaqueShow more...
The app has shipped only one release in the last 125 days, placing it firmly in a maintenance state. There is no evidence of active development, new content, or ongoing feature iteration since the initial launch. Given the lack of subsequent updates, the development momentum is currently stagnant.
Who built it?
Mikhail Nikitin
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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 Refrigerant Charge Calculator
How's the Utilities market?
Refrigerant Charge Calculator holds a niche position as a free, offline-first utility in the Utilities category. With a 4.6-star rating across 15 reviews, the app maintains a lean, specialized profile that avoids the subscription-gating common in broader HVAC tool suites.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Refrigerant Charge Calculator
Where is it heading?
The HVAC utility market is shifting toward integrated compliance and diagnostic suites, putting pressure on standalone calculators. Refrigerant Charge Calculator remains advantaged by its offline-first design, but the lack of recent updates suggests it may struggle to keep pace with industry-wide transitions to low-GWP refrigerants.
- The 125-day update gap indicates a maintenance-only posture, which limits the ability to respond to emerging A2L refrigerant standards.
The SWOT
- Offline-first architecture ensures utility in connectivity-dead zones like mechanical rooms
- No-account requirement reduces friction for field technicians
- Integration of A2L refrigerant compliance guides to capture low-GWP market transitions
Next best moves
Audit A2L refrigerant support because the current list lacks recent updates → maintain competitive relevance
The counter-intuitive read
The app's lack of cloud features is its primary retention mechanism…
Read the full takeSince the last report: The app remains in a stable, maintenance-only state with no functional changes or pricing updates. The primary shift is a more focused articulation of competitive threats and opportunities within the SWOT analysis.
Bottom line
Maintaining the current offline-first utility is essential for field retention, but the lack of recent updates risks obsolescence as A2L refrigerant adoption accelerates.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Refrigerant Charge Calculator free to use?
Does Refrigerant Charge Calculator work without internet?
What refrigerant types are supported?
Sources
- [1] App Store, source
Report last updated