--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "VPD Vapor Pressure Calculator" developer_entity: "harry bloch" bundle_id: "com.HFB.VaporPressureVPDCalculator" app_store_id: "1586028655" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-03-11" report_date: "2026-10-14" last_verified: "2026-10-14T00:00:00.000Z" report_version: "1.5.2" total_reviews: 9 overall_rating: 2.6 sentiment: "Upset" sentiment_score: 10 confidence: "medium" confidence_score: 0.5 top_complaint_theme: "Users report that ads continue to appear even after paying for ad removal services" review_sample_size: 2 total_review_count: 2 analyzed_review_count: 2 data_age_days: 32 momentum_velocity: "zombie" intelligence_version: 2 tags: ["utilities", "free", "upset sentiment", "mobile app", "app review", "app analysis", "indoor", "gardeners,", "hydroponic"] canonical_url: "https://marlvel.ai/apps/vpd-vapor-pressure-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # VPD Vapor Pressure Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 2.56 · Sentiment Upset - **Recent focus**: Users report that ads continue to appear even after paying for ad removal services (top complaint) > **TL;DR:** VPD Vapor Pressure Calculator is a utilities app by harry bloch, rated 2.56/5 by 9 users, with Upset user sentiment (10/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** VPD Vapor Pressure Calculator faces Upset user sentiment (2.56/5 from 9 reviews), with users reporting users report that ads continue to appear even after paying for ad removal services as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 2.56/5 (9 reviews) | | **User Mood** | Upset | | **Category** | Utilities | | **Developer** | harry bloch | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 32d | ## Metadata & Market Performance - **Publisher:** harry bloch - **Category:** Utilities - **Target Audience:** Indoor gardeners, hydroponic hobbyists, and greenhouse owners looking to optimize plant health and yield. - **Platforms:** iOS - **Version Reviewed:** 1.5.2 - **Report Date:** 2026-10-14 - **Signal Count:** 2 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 1586028655 - **Bundle ID:** com.HFB.VaporPressureVPDCalculator - **Data Window:** Analysis based on signals collected up to 2026-10-14 ## Executive Snapshot **What it is:** VPD Vapor Pressure Calculator is a utility app for indoor gardeners and hydroponic hobbyists that calculates Vapor Pressure Deficit to manage grow room conditions. **Why users hire it:** The app serves growers who need to regulate humidity and temperature to prevent fungal infections and crop stress, but the current functional failures prevent users from achieving these outcomes. ## App DNA (Features & Intent) - **[Standard] VPD Calculation:** Calculates Vapor Pressure Deficit based on air moisture and saturation levels to manage plant environment. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Environmental Regulation Guidance:** Provides algorithmic suggestions for adjusting humidity and temperature in hydroponic and organic grow setups. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} VPD Vapor Pressure Calculator holds a 2.56-star rating across 9 total platform ratings. The lack of updates for 19 months signals a stagnant position in the utilities category. ## Monetization Strategy - **Model:** Free - **Tiers:** Free with affiliate links - **Analysis:** The app is free to use and monetizes through affiliate links rather than traditional ad networks. ## 🔴 User Sentiment (Medium Confidence: 2 of 2 reviews analyzed) {#user-sentiment} - **Overall Rating:** 2.56/5 - **Platform Split:** iOS 2.6/5 (9 ratings) - **Overall Sentiment:** Upset ### Top Complaints (Impact Areas) - **Users report that ads continue to appear even after paying for ad removal services** ## SWOT Analysis {#swot} **Core Strengths:** - Environmental regulation guidance provides niche utility for indoor grow environments **Growth Levers:** - Implementing a stable, ad-free subscription model could capture users frustrated by current monetization failures ## What's New - **Latest (v1.5.2, 1 years ago):** Replaced Google Ads with affiliate links to monetize content. ## App Momentum (Zombie) {#momentum} - No major release in 19 months. - Latest release replaced Google Ads. > **Cadence:** 1 total versions · 0 majors in last 6 months · 581 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} VPD Vapor Pressure Calculator is an utilities app that is completely free. It holds a 2.56/5 rating from 9 reviews. > **Bottom Line:** Sunset the broken ad-removal service and prioritize the core calculation engine to restore basic utility, as the current functional failure renders VPD Vapor Pressure Calculator unusable for its primary purpose. **Best for:** Indoor gardeners, hydroponic hobbyists, and greenhouse owners looking to optimize plant health and yield. ### PM Action Plan (Next Best Moves) - [ ] [SUNSET] Sunset the current ad-removal service because users report it fails to function → reduce refund surge ### Outlook: Declining Users report: The indoor gardening utility market is consolidating around tools with active update cadences and reliable data outputs. VPD Vapor Pressure Calculator remains exposed due to its 19-month silence and broken core functionality, which will likely lead to further rating erosion and user abandonment. - 🔴 The 19-month development silence indicates the app is in maintenance mode, which leaves the tool vulnerable to functional decay. - 🔴 Persistent reports of broken core functionality and failed monetization features drive user distrust, accelerating churn pressure. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 2.56/5 | | Total Reviews | 9 | | Sentiment | Upset (10/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **VPD Vapor Pressure Calculator** (this app) | 2.56/5 | Upset | harry bloch | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.9/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [App For Siri Commands Tips](https://marlvel.ai/apps/app-for-siri-commands-tips) | N/A/5 | N/A | Anh La Phan Son | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Bin Days - Bin Reminder](https://marlvel.ai/apps/bin-days-bin-reminder) | N/A/5 | N/A | Vicki Partridge | ## Company Profile - **Developer:** harry bloch - **Website:** [https://harryfbloch.wixsite.com/mysite](https://harryfbloch.wixsite.com/mysite) - **Social:** [Facebook](https://www.facebook.com/wix) · [X/Twitter](https://www.twitter.com/wix) · [LinkedIn](https://www.linkedin.com/company/wix-com) ## Data Sources & Links - **App Store ID:** 1586028655 - **Dev Site:** [Official Website](https://harryfbloch.wixsite.com/mysite) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.9/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*App For Siri Commands Tips*](https://marlvel.ai/apps/app-for-siri-commands-tips) (Anh La Phan Son) · N/A Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Bin Days - Bin Reminder*](https://marlvel.ai/apps/bin-days-bin-reminder) (Vicki Partridge) · N/A Rating - [*Controller Tester FGC*](https://marlvel.ai/apps/controller-tester-fgc) (Aaron Lowe) · 5.0/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Gear Ratio Calculator & RPM*](https://marlvel.ai/apps/cog-gear-ratio-calculator) (Linh Phan Nhat Khanh) · N/A Rating - [*MDflow Web Clipper*](https://marlvel.ai/apps/mdflow-web-clipper) (DataOps, s.r.o.) · N/A Rating - [*NordVPN: VPN Fast & Secure*](https://marlvel.ai/apps/com-nordvpn-nordvpn) (Nordvpn S.A.) · 4.7/5 Rating ## Frequently Asked Questions {#faq} ### Is VPD Vapor Pressure Calculator accurate for my indoor garden? Users report that the core calculator functionality is broken and fails to perform basic math operations correctly, making it unreliable for gardening tasks. ### Does the paid ad-removal feature work? No. According to user reviews, the paid ad-removal feature fails to stop advertisements from appearing, leading to user frustration. ### Is VPD Vapor Pressure Calculator still being updated? The app has been silent for 19 months, with the last store update occurring in March 2025. ## 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:** 0.5/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 2 - **Data Sources:** user reviews, developer website, company about page, 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:** 32 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/vpd-vapor-pressure-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.