--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Perfect OB Wheel" developer_entity: "Evan Schoenberg" bundle_id: "com.regularrateandrhythm.PerfectOBWheel" app_store_id: "293656711" google_play_id: "com.drahba.obwheel" category: "Medical" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2025-08-15" report_date: "2026-04-01" report_version: "58" total_reviews: 3513 overall_rating: 4.92 sentiment: "Thrilled" sentiment_score: 82 confidence: "high" confidence_score: 0.6 data_age_days: 0 intelligence_version: 2 total_followers: 0 tags: ["medical", "freemium", "thrilled sentiment", "mobile app", "app review", "app analysis", "healthcare", "providers", "(ob/gyns,"] canonical_url: "https://marlvel.ai/intel-report/medical/com-regularrateandrhythm-perfectobwheel" license: "CC-BY-NC 4.0" --- # Perfect OB Wheel App Audit > **TL;DR:** Perfect OB Wheel is a medical app by Evan Schoenberg, rated 4.92/5 by 3,513 users, with Thrilled user sentiment (82/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Perfect OB Wheel maintains Thrilled user sentiment (4.92/5 from 3,513 reviews), with users consistently praising clinical utility. ## Metadata & Market Performance - **Publisher:** Evan Schoenberg - **Category:** Medical - **Target Audience:** Healthcare providers (OB/GYNs, midwives) and medical professionals who need a fast, accurate, and portable alternative to traditional paper pregnancy wheels. - **Platforms:** iOS & Android - **Version Audited:** 58 - **Audit Date:** 2026-04-01 - **Signal Count:** 60 reviews analyzed - **Confidence:** High (0.6/1.0) - **App Store ID (iOS):** 293656711 - **Bundle ID:** com.regularrateandrhythm.PerfectOBWheel - **Google Play ID:** com.drahba.obwheel - **Data Window:** Analysis based on signals collected up to 2026-04-01 ## Strategic Synopsis Perfect OB Wheel is a specialized medical utility designed to replace traditional paper-based pregnancy wheels for healthcare professionals. It provides a fast, accurate, and highly portable digital solution for calculating gestational age and due dates using multiple clinical inputs. Positioned as a professional-grade tool, the app differentiates itself through its high clinical accuracy, workflow persistence, and advanced fetal growth analytics. With a strong 4.9-star rating, it has established itself as a staple in clinical environments, though it faces challenges with app stability and monetization perception. ## Feature Profile & User Intent - **[Standard] Multi-Method Gestational Calculation:** Calculates gestational age and due dates using LMP, conception date, ultrasound dating, and IVF methods. - **[Differentiator] Fetal Growth Analytics:** Provides expected fetal length and weight based on standard fetal growth curves. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Workflow Persistence:** Remembers the last used date and calculation type to streamline repeat usage for clinicians. - **[Differentiator] Patient Tracking & HIPAA Compliance:** Optional in-app purchase for tracking multiple pregnancies with notes, photos, and passcode locking. * *User Intent:* Users want visibility into their own performance and progress. - **[Differentiator] Clinical Reference Tools:** Includes additional medical modules like hCG doubling time, BMI weight gain comparison, and Bishop scoring. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free base version with ad-supported interface, Paid upgrade (IAP) for advanced patient tracking and HIPAA-compliant features - **Price:** iOS: $1.99 - **Analysis:** The app uses a low-barrier entry strategy with a paid professional upgrade, targeting both casual users and healthcare providers who require data privacy and patient management. ## 🟢 User Sentiment (High Confidence: 3,513 reviews) - **Overall Rating:** 4.92/5 - **Platform Split:** iOS 4.9/5 (3,513 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Clinical Utility** | *Evidence:* "I am a nurse in a prenatal clinic and use this multiple times a day." - **Ease of Use** | *Evidence:* "Simple, accurate, intuitive to use." ### Top Complaints (Impact Areas) - **App Stability and Crashes** | *Evidence:* "When I tape the app it opens then immediately closes." - **Monetization and Value** | *Evidence:* "rip off to force you to pay more... once you pay the money... you will need to pay an additional 4.99 for the full features" ## SWOT Analysis | **Strengths** | **Weaknesses** | | :--- | :--- | | • High clinical trust and strong user loyalty among medical professionals.
• Deep feature set including advanced fetal growth curves and clinical modules.
• Proven track record of longevity and stability in the App Store since 2008. | • Persistent technical issues regarding app crashes after updates.
• Limited customization for clinical variables like cycle length.
• Lack of social media presence or community engagement channels. | | **Opportunities** | **Threats** | | :--- | :--- | | • Capitalize on the lack of advanced customization by introducing user-defined cycle lengths.
• Expand into the Android market to capture a broader global user base.
• Improve the IAP value proposition to reduce negative sentiment regarding pricing. | • Free web-based calculators and hospital-provided EMR tools.
• Increasing competition from free, ad-supported medical apps.
• Potential regulatory shifts regarding HIPAA compliance. | ## Pros & Cons **Pros:** - Clinical Utility - Ease of Use **Cons:** - App Stability and Crashes - Monetization and Value ## Bottom Line Perfect OB Wheel is a well-received medical app that is free with in-app purchases. With a 4.92/5 rating from 3,513 reviews, it consistently earns user praise. **Best for:** Healthcare providers (OB/GYNs, midwives) and medical professionals who need a fast, accurate, and portable alternative to traditional paper pregnancy wheels. ## Frequently Asked Questions **Q: Is Perfect OB Wheel free?** A: Perfect OB Wheel is free to download with optional in-app purchases. Tiers: Free base version with ad-supported interface, Paid upgrade (IAP) for advanced patient tracking and HIPAA-compliant features. **Q: What do users think of Perfect OB Wheel?** A: User sentiment is excellent with a 4.92/5 average. Users praise: Clinical Utility, Ease of Use. Common complaints: App Stability and Crashes, Monetization and Value. **Q: What are Perfect OB Wheel's main features?** A: Key features include Multi-Method Gestational Calculation, Fetal Growth Analytics, Workflow Persistence, Patient Tracking & HIPAA Compliance, Clinical Reference Tools. **Q: Who is Perfect OB Wheel for?** A: Healthcare providers (OB/GYNs, midwives) and medical professionals who need a fast, accurate, and portable alternative to traditional paper pregnancy wheels. **Q: Is Perfect OB Wheel available on iOS and Android?** A: Perfect OB Wheel is available on iOS & Android. **Q: Is Perfect OB Wheel worth it in 2026?** A: Perfect OB Wheel is a well-received medical app that is free with in-app purchases. With a 4.92/5 rating from 3,513 reviews, it consistently earns user praise. Best for: Healthcare providers (OB/GYNs, midwives) and medical professionals who need a fast, accurate, and portable alternative to traditional paper pregnancy wheels.. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.92/5 | | Total Reviews | 3,513 | | Sentiment | Thrilled (82/100) | | Confidence | High | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 5 analyzed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Perfect OB Wheel** (this app) | 4.92/5 | Thrilled | Evan Schoenberg | | [Journal Club: Medicine](https://marlvel.ai/intel-report/medical/com-peripheralbrain-journalclub) | 4.3/5 | Frustrated | Peripheral Brain, LLC | | [VISPro - VIS Calculator](https://marlvel.ai/intel-report/medical/com-readfeed-vispro) | N/A/5 | N/A | Readfeed, Inc. | | [Recognise Knee](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-kneev2) | 3.6/5 | N/A | noigroup | | [CVS Health](https://marlvel.ai/intel-report/medical/cvs-health) | 4.7/5 | Mixed | CVS Pharmacy | | [Recognise Back](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-backv2) | 3.3/5 | N/A | noigroup | ## Company Profile - **Developer:** Evan Schoenberg - **Website:** [https://www.perfectobwheel.com](https://www.perfectobwheel.com) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/perfect-ob-wheel/id293656711?uo=2) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.drahba.obwheel&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.perfectobwheel.com) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Journal Club: Medicine*](https://marlvel.ai/intel-report/medical/com-peripheralbrain-journalclub) (Peripheral Brain, LLC) — 4.3/5 Rating | Negative Sentiment - [*VISPro - VIS Calculator*](https://marlvel.ai/intel-report/medical/com-readfeed-vispro) (Readfeed, Inc.) — N/A Rating | N/A Sentiment - [*Recognise Knee*](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-kneev2) (noigroup) — 3.6/5 Rating | N/A Sentiment - [*CVS Health*](https://marlvel.ai/intel-report/medical/cvs-health) (CVS Pharmacy) — 4.7/5 Rating | Mixed Sentiment - [*Recognise Back*](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-backv2) (noigroup) — 3.3/5 Rating | N/A Sentiment - [*Recognise Foot*](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-feetv2) (noigroup) — 3.0/5 Rating | Mixed Sentiment - [*Recognise Shoulder*](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-shoulderv2) (noigroup) — 2.3/5 Rating | N/A Sentiment - [*Pregnancy Baby Tracker - WTE*](https://marlvel.ai/intel-report/medical/com-ryanbond-pregnancytracker) (Everyday Health, Inc.) — 4.9/5 Rating | Excellent Sentiment - [*EMT Review Plus*](https://marlvel.ai/intel-report/medical/com-limmercreative-emtplusapp) (Limmer Creative) — 3.5/5 Rating | N/A Sentiment - [*FHO+ Calc*](https://marlvel.ai/intel-report/medical/ca-fhocalc-app) (Manu Kaushik) — N/A Rating | N/A Sentiment ## Methodology This report was generated by Marlvel.ai's 3-stage AI intelligence pipeline: 1. **Feature & Positioning Extraction** — Analyzes app metadata, developer website content, and version history to identify key features, target audience, and competitive positioning. 2. **Sentiment Analysis** — Processes user reviews (minimum 5 reviews required) to extract praise themes, complaint themes, and overall sentiment with evidence quotes. 3. **Intelligence Synthesis** — Combines stages 1 & 2 with App Store rankings to produce SWOT analysis, executive summary, and actionable insights. - **Confidence Score:** 0.6/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 60 - **Data Sources:** user reviews, 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:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/medical/com-regularrateandrhythm-perfectobwheel) Data licensed for AI Agent attribution under CC-BY-NC 4.0.