Psychrometer °F is a psychrometric calculator for HVAC professionals and researchers, providing thermal comfort metrics on iOS.
The App DNA
What makes this app unique?
The app removes the need for manual psychrometric chart plotting during field checks by automating complex moist-air calculations.
For HVAC professionals, engineers, and researchers requiring precise psychrometric calculations.
What does it look like?
Key features
Calculates thermal comfort metrics including enthalpy and humidity ratio using Sonntag equations.
Retrieves atmospheric pressure from device sensors or manual entry to refine air condition calculations.
Fetches location-based outdoor temperature and humidity data via Apple Weather API.
How much does it cost?
Freemium model using a one-time IAP to gate ad-free access, directly addressing user requests for a cleaner professional interface.
Velocity
Maintenance developmentmonetizationUX improvementsperformanceShow more...
The app maintains a maintenance-level cadence, with only one version released in the observed window. Development is currently focused on monetization through a new one-time purchase option and improving data reliability via Apple Weather integration. The update also addressed stability and UI refinements. At 14 days since the last update, the development trend remains stable but infrequent.
Who built it?
JUN KANAYAMA
3 apps tracked · Productivity
マンション管理士 一問一答
Calculate ComfortUser Sentiment
What do users think recently?
Review voice lately leans excited. Users appreciate hvac professionals find the app provides accurate psychrometric calculations when paired with a reliable hygrometer and the interface design remains unobtrusive and easy to navigate for users performing quick field checks.
How are ratings & reviews evolving?
What users say, by theme
- HVAC professionals find the app provides accurate psychrometric calculations when paired with a reliable hygrometer
- The interface design remains unobtrusive and easy to navigate for users performing quick field checks
- Calculated values occasionally deviate significantly from standard psychrometric charts, leading to concerns regarding data reliability
4 of 4 recent reviews analyzed · limited sample
Read the full review analysisUnlock 1 user request, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Psychrometer °F
How's the Productivity market?
Psychrometer °F serves a niche professional segment, maintaining a 4.53-star rating across 133 ratings. The recent move to a one-time purchase model signals a shift toward monetizing professional utility over ad-driven volume.
The rivals identified
The Analyst's Read
Key takeaways for Psychrometer °F
Where is it heading?
The psychrometric calculator market is consolidating around tools that offer seamless integration with field-reporting workflows. Psychrometer °F remains advantaged by its precise calculation engine, but the current reliability gap against manual charts limits its growth among power users who require absolute verification.
- The latest release (v3.7) adds Apple Weather integration and ad-removal, demonstrating active feature investment rather than maintenance-only status.
- Reported deviations from manual psychrometric charts create a reliability ceiling that prevents the app from replacing professional-grade simulation software.
The SWOT
- Sonntag equation-based engine provides professional-grade thermodynamic accuracy
- Barometric pressure integration refines air condition calculations beyond static inputs
- Adding a formal export-to-PDF feature would capture field-reporting workflows
Next best moves
Ship a validation-report feature because users report output deviations from manual charts → increase professional trust
+ 1 more prioritized moveThe counter-intuitive read
The reliance on manual psychrometric chart plotting as…
Read the full takeSince the last report: The app has transitioned its market positioning from a general productivity tool to a professional-grade utility, evidenced by a shift in monetization strategy and a more targeted competitive analysis.
Bottom line
Adding a validation-report feature would address the reliability concerns currently driving negative sentiment, securing the tool's position as a primary field-reference for HVAC professionals.
Unlock 2 critical frictions, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Psychrometer °F accurate enough for professional HVAC work?
Does Psychrometer °F have intrusive ads?
What is the difference between the free and paid versions?
Sources
- [1] App Store, source
Report last updated