--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Psychrometer °F" developer_entity: "JUN KANAYAMA" bundle_id: "jp.kanayama.PsychrometerF" app_store_id: "650395794" category: "Productivity" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-08-11" report_date: "2026-08-25" last_verified: "2026-08-25T00:00:00.000Z" report_version: "3.7" total_reviews: 133 overall_rating: 4.5 sentiment: "Excited" sentiment_score: 65 confidence: "medium" confidence_score: 0.45 top_praise_theme: "HVAC professionals find the app provides accurate psychrometric calculations when paired with a reliable hygrometer" top_complaint_theme: "Calculated values occasionally deviate significantly from standard psychrometric charts, leading to concerns regarding data reliability" review_sample_size: 4 total_review_count: 4 analyzed_review_count: 4 data_age_days: 13 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["productivity", "freemium", "excited sentiment", "mobile app", "app review", "app analysis", "professionals,", "engineers,", "researchers"] canonical_url: "https://marlvel.ai/apps/psychrometer-f" license: "CC-BY-NC 4.0" content_version: "v2" --- # Psychrometer °F Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Freemium - **Signal**: Rating 4.53 · Sentiment Excited - **Recent focus**: Calculated values occasionally deviate significantly from standard psychrometric charts, leading to concerns regarding data reliability (top complaint) · HVAC professionals find the app provides accurate psychrometric calculations when paired with a reliable hygrometer (top praise) > **TL;DR:** Psychrometer °F is a productivity app by JUN KANAYAMA, rated 4.53/5 by 133 users, with Excited user sentiment (65/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Psychrometer °F maintains Excited user sentiment (4.53/5 from 133 reviews), with users consistently praising hvac professionals find the app provides accurate psychrometric calculations when paired with a reliable hygrometer. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.53/5 (133 reviews) | | **User Mood** | Excited | | **Category** | Productivity | | **Developer** | JUN KANAYAMA | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 13d | ## Metadata & Market Performance - **Publisher:** JUN KANAYAMA - **Category:** Productivity - **Target Audience:** HVAC professionals, engineers, and researchers requiring precise psychrometric calculations. - **Platforms:** iOS - **Version Reviewed:** 3.7 - **Report Date:** 2026-08-25 - **Signal Count:** 4 reviews analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 650395794 - **Bundle ID:** jp.kanayama.PsychrometerF - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-25 ## Executive Snapshot **What it is:** Psychrometer °F is a psychrometric calculator for HVAC professionals and researchers, providing thermal comfort metrics on iOS. **Why users hire it:** The app removes the need for manual psychrometric chart plotting during field checks by automating complex moist-air calculations. ## App DNA (Features & Intent) - **[Standard] Psychrometric Calculation Engine:** Calculates thermal comfort metrics including enthalpy and humidity ratio using Sonntag equations. - **[Differentiator] Barometric Pressure Integration:** Retrieves atmospheric pressure from device sensors or manual entry to refine air condition calculations. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Standard] Apple Weather Integration:** Fetches location-based outdoor temperature and humidity data via Apple Weather API. ## Market Position {#market-position} 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. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free with banner and launch ads, One-time purchase to remove ads - **Analysis:** Freemium model using a one-time IAP to gate ad-free access, directly addressing user requests for a cleaner professional interface. ## 🟢 User Sentiment (Medium Confidence: 4 of 4 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.53/5 - **Platform Split:** iOS 4.5/5 (133 ratings) - **Overall Sentiment:** Excited ### Top Praises - **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** ### Top Complaints (Impact Areas) - **Calculated values occasionally deviate significantly from standard psychrometric charts, leading to concerns regarding data reliability** ## SWOT Analysis {#swot} **Core Strengths:** - Sonntag equation-based engine provides professional-grade thermodynamic accuracy - Barometric pressure integration refines air condition calculations beyond static inputs **Growth Levers:** - Adding a formal export-to-PDF feature would capture field-reporting workflows ## Recent Changes (v2 → v3) {#recent-changes} 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. **Overall trend**: Stable **Compared at**: 2026-08-25 ### High-impact changes - **[Shifted] Monetization Strategy Pivot** (positioning) ### Medium-impact changes - **[Shifted] Competitive Threat Reclassification** (swot) - **[Shifted] Roadmap Prioritization** (features) ## What's New - **Latest (v3.7, 2 weeks ago):** Introduced a one-time ad-removal purchase and integrated Apple Weather for outdoor data, alongside improved Heat Index and WBGT displays. ## App Momentum (Maintenance) {#momentum} - Integrated Apple Weather for outdoor data. - Shipped one-time ad-removal purchase. - Improved Heat Index and WBGT displays. > **Cadence:** 1 total versions · 1 majors in last 6 months · 14 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Psychrometer °F is a productivity app that is free with in-app purchases. It holds a 4.53/5 rating from 133 reviews. > **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. **Best for:** HVAC professionals, engineers, and researchers requiring precise psychrometric calculations. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a validation-report feature because users report output deviations from manual charts → increase professional trust ### Outlook: Stable 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. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.53/5 | | Total Reviews | 133 | | Sentiment | Excited (65/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Psychrometer °F** (this app) | 4.53/5 | Excited | JUN KANAYAMA | | [Mitsu: AI Life Coach](https://marlvel.ai/apps/mitsu-ai-life-coach) | N/A/5 | N/A | C2 Insights | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | | [HitWave](https://marlvel.ai/apps/ciendor-applications-hitwave) | 2.6/5 | Mixed | Ciendor Holdings Corp. LTD | | [Paper: Sketch, Draw & Create](https://marlvel.ai/apps/paper-sketch-draw-create) | 4.6/5 | N/A | Evernote Corporation | | [Pattrn - Discipline Tracker](https://marlvel.ai/apps/pattrn-discipline-tracker) | 4.8/5 | Thrilled | Pedro Schott | ## Company Profile - **Developer:** JUN KANAYAMA - **Website:** [https://apps.apple.com/us/developer/jun-kanayama/id605648452?uo=4](https://apps.apple.com/us/developer/jun-kanayama/id605648452?uo=4) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/psychrometer-f/id650395794?uo=4) - **Dev Site:** [Official Website](https://apps.apple.com/us/developer/jun-kanayama/id605648452?uo=4) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Mitsu: AI Life Coach*](https://marlvel.ai/apps/mitsu-ai-life-coach) (C2 Insights) · N/A Rating - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) · 4.8/5 Rating - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. LTD) · 2.6/5 Rating - [*Paper: Sketch, Draw & Create*](https://marlvel.ai/apps/paper-sketch-draw-create) (Evernote Corporation) · 4.6/5 Rating - [*Pattrn - Discipline Tracker*](https://marlvel.ai/apps/pattrn-discipline-tracker) (Pedro Schott) · 4.8/5 Rating | Excellent Sentiment - [*SpaceDesk App*](https://marlvel.ai/apps/spacedesk-app) (Hawsabah) · N/A Rating - [*한음달-한국인에게 꼭 맞는 음력달력, 캘린더*](https://marlvel.ai/apps/app--103) (YunaSoft Inc.) · 4.6/5 Rating - [*바로메모 - 매일 바로 작성하는 메모장*](https://marlvel.ai/apps/cswpd-memo) (SuWon Choi) · N/A Rating - [*근로장려금 알리미 - 신청, 기준, 금액계산 가이드*](https://marlvel.ai/apps/com-swing2app-v3-d83e9bb95c05347f59ad81dea3b925ebf) (SY Company) · 3.8/5 Rating - [*통화관리솔루션 (부평구청용)*](https://marlvel.ai/apps/byto-bupyeong) (BYTO) · N/A Rating ## Frequently Asked Questions {#faq} ### Is Psychrometer °F accurate enough for professional HVAC work? Users confirm the calculation accuracy against professional thermodynamic simulation software, though some report deviations from manual psychrometric charts. ### Does Psychrometer °F have intrusive ads? The app includes banner and launch ads, but users describe the placement as unobtrusive. A one-time purchase is available to remove all advertisements. ### What is the difference between the free and paid versions? The free version includes banner and launch ads. A one-time in-app purchase removes these advertisements to provide a cleaner professional interface. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 4 - **Data Sources:** user reviews, developer website, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 13 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/psychrometer-f) Data licensed for AI Agent attribution under CC-BY-NC 4.0.