--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "INTERGROWTH-21st" developer_entity: "University of Oxford" bundle_id: "uk.ac.ox.wrh.intergrowth-21" app_store_id: "6443848059" category: "Health & Fitness" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-03-20" report_date: "2026-08-14" last_verified: "2026-08-14T00:00:00.000Z" report_version: "1.12.1" total_reviews: 0 confidence: "low" confidence_score: 0.25 data_age_days: 2 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["health & fitness", "free", "mobile app", "app review", "app analysis", "healthcare", "providers,", "medical"] canonical_url: "https://marlvel.ai/apps/intergrowth-21st" license: "CC-BY-NC 4.0" content_version: "v2" --- ## ⚠ Content Warning This report covers topics classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before acting on any information here. --- # INTERGROWTH-21st Intelligence Report ## TL;DR {#tldr} - **Category**: Health & Fitness · Free > **TL;DR:** INTERGROWTH-21st is a health & fitness app by University of Oxford, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** INTERGROWTH-21st is a health & fitness app by University of Oxford. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Health & Fitness | | **Developer** | University of Oxford | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.25/1.0) | | **Data Age** | 2d | ## Metadata & Market Performance - **Publisher:** University of Oxford - **Category:** Health & Fitness - **Target Audience:** Healthcare providers, medical researchers, and clinicians managing maternal and neonatal care. - **Platforms:** iOS - **Version Reviewed:** 1.12.1 - **Report Date:** 2026-08-14 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.25/1.0) - **App Store ID (iOS):** 6443848059 - **Bundle ID:** uk.ac.ox.wrh.intergrowth-21 - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-14 ## Executive Snapshot **What it is:** INTERGROWTH-21st is a clinical tool for healthcare providers to assess fetal and preterm infant growth, available as a free utility on iOS. **Why users hire it:** Clinicians need standardized, evidence-based tools to track preterm development until 64 weeks post-menstrual age, where WHO standards begin. ## App DNA (Features & Intent) - **[Differentiator] Growth Plotting Tools:** Calculates and plots size at birth and postnatal growth for preterm infants up to 64 weeks post-menstrual age. - **[Differentiator] Clinical Standards Integration:** Provides prescriptive, international standards for fetal growth and newborn size as adjuncts to WHO charts. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} INTERGROWTH-21st serves a specialized clinical segment, functioning as a non-commercial utility rather than a consumer-facing app. Its position relies on the University of Oxford's research authority rather than market-driven growth metrics. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access for all users - **Analysis:** The app operates as a free, non-commercial tool provided by the University of Oxford to support global clinical standards. ## SWOT Analysis {#swot} **Core Strengths:** - Clinical standards integration provides a defensible barrier against generic health trackers **Growth Levers:** - Localized clinical adoption in regions lacking standardized neonatal tools ## Recent Changes (v2 → v3) {#recent-changes} The app's positioning shifted toward a non-commercial, foundational utility model, while the underlying product remains in a static maintenance state. No functional changes or feature updates occurred during this period. **Overall trend**: Stable **Compared at**: 2026-08-14 ### Medium-impact changes - **[Shifted] Refined Market Positioning** (positioning) ### Low-impact changes - **[Shifted] SWOT Analysis Update** (swot) ## What's New - **Latest (v1.12.1, 4 months ago):** Expanded growth standards support. ## App Momentum (Maintenance) {#momentum} - Ships ~2 updates per year. - Last major release March 2026. > **Cadence:** 1 total versions · 1 majors in last 6 months · 147 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} INTERGROWTH-21st is a health & fitness app that is completely free. > **Bottom Line:** INTERGROWTH-21st maintains its utility as a specialized clinical reference, but the dormant release cadence risks obsolescence as global standards evolve. Prioritizing a feedback loop with clinical users would ensure the tool remains aligned with current neonatal care requirements. **Best for:** Healthcare providers, medical researchers, and clinicians managing maternal and neonatal care. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit clinical feedback channels because the ~21-week update cadence suggests a disconnect from user needs → improve utility relevance ### Outlook: Stable The clinical utility market for neonatal growth remains stable, with INTERGROWTH-21st serving as a niche, research-backed reference. The lack of active feature expansion suggests the app will remain a static tool, which is sufficient for its current purpose but leaves it vulnerable to future updates in international growth standards. - ⚪ The ~21-week update cadence confirms a maintenance-only lifecycle, which limits the app's ability to adapt to changing clinical standards. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **INTERGROWTH-21st** (this app) | N/A/5 | N/A | University of Oxford | | [GoTall - Height Predictor](https://marlvel.ai/apps/gotall-height-predictor) | 4.5/5 | n/a | Grow Labs LLC | | [Mind - Méditations guidées](https://marlvel.ai/apps/mind-m-ditations-guid-es) | 4.6/5 | Excited | MIND AND CIE | | [Strava: Run, Bike, Walk](https://marlvel.ai/apps/strava-run-bike-walk) | 4.7/5 | n/a | Strava, Inc. | | [Taller AI: Height Maximizer](https://marlvel.ai/apps/taller-ai-height-maximizer) | 4.7/5 | Excited | Leadimize | | [TallerTeen - Grow Taller Now](https://marlvel.ai/apps/tallerteen-grow-taller-now) | 4.7/5 | n/a | Viral App Developement LLC | ## Company Profile - **Developer:** University of Oxford - **Website:** [https://intergrowth21.com/](https://intergrowth21.com/) - **Social:** [X/Twitter](https://twitter.com/intergrowth21st) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/intergrowth-21st/id6443848059?uo=4) - **Dev Site:** [Official Website](https://intergrowth21.com/) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*GoTall - Height Predictor*](https://marlvel.ai/apps/gotall-height-predictor) (Grow Labs LLC) · 4.5/5 Rating - [*Mind - Méditations guidées*](https://marlvel.ai/apps/mind-m-ditations-guid-es) (MIND AND CIE) · 4.6/5 Rating | Positive Sentiment - [*Strava: Run, Bike, Walk*](https://marlvel.ai/apps/strava-run-bike-walk) (Strava, Inc.) · 4.7/5 Rating - [*Taller AI: Height Maximizer*](https://marlvel.ai/apps/taller-ai-height-maximizer) (Leadimize) · 4.7/5 Rating | Positive Sentiment - [*TallerTeen - Grow Taller Now*](https://marlvel.ai/apps/tallerteen-grow-taller-now) (Viral App Developement LLC) · 4.7/5 Rating - [*Activity Tracker・FitnessView*](https://marlvel.ai/apps/activity-tracker-fitnessview) (Funn Media, LLC) · 4.0/5 Rating - [*Avatran Soul*](https://marlvel.ai/apps/avatran-soul) (Avatran GmbH) · N/A Rating - [*Bubblic: Connect with people.*](https://marlvel.ai/apps/bubblic-connect-with-people) (Bubblic Inc.) · 4.6/5 Rating | Positive Sentiment - [*evolum - Meditation & Yoga*](https://marlvel.ai/apps/evolum-meditation-yoga) (Evolum) · 4.7/5 Rating | Positive Sentiment - [*Holoholo: Daily Memories*](https://marlvel.ai/apps/holoholo-daily-memories) (For Pedestrians LLC.) · 4.4/5 Rating ## 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:** 0.25/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 2 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/intergrowth-21st) Data licensed for AI Agent attribution under CC-BY-NC 4.0.