BMI Calculator・Weight Diary
By ZeroPlay
BMI Calculator・Weight Diary is a health-tracking app for iOS that provides BMI calculations and weight logging for both adults and children.
The App DNA
What makes this app unique?
The app removes the cognitive friction of manual unit conversion and age-specific percentile calculations for parents and health-conscious adults.
For Individuals tracking weight and health metrics who require both adult and child BMI monitoring.
What does it look like?
Key features
Calculates BMI using metric or imperial units without manual conversion, providing WHO thresholds for adults and CDC percentiles for ages 2–19.
Imports and exports weight data to Apple Health, requiring explicit user authorization and a subscription.
Visualizes weight progress and historical data over time.
How much does it cost?
Freemium model gates advanced health analytics and data portability behind a subscription.
Velocity
Maintenance developmentopaqueShow more...
With only one release in the observed window, the app is currently in a maintenance state. The initial release provides the core functionality, but there is no evidence of a recurring update cadence or active development cycle. Future updates will be required to determine if the developer intends to maintain an active feature roadmap or if the app will remain in a static state.
Who built it?
ZeroPlay
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Access the full report for freeUser Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for BMI Calculator・Weight Diary
How's the Health & Fitness market?
BMI Calculator・Weight Diary occupies a niche in the Health & Fitness category by focusing on dual-profile tracking. The reliance on a subscription for Apple Health integration limits its reach compared to free, platform-native alternatives.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for BMI Calculator・Weight Diary
Where is it heading?
The health-tracking market is consolidating around apps that offer seamless data synchronization with platform-native health kits. BMI Calculator・Weight Diary remains exposed due to its restrictive paywall, which will likely prevent it from gaining significant market share without a shift in its monetization strategy.
- The app remains in a maintenance phase with no feature expansion since launch, signaling a focus on stability over growth.
- Gating Apple Health behind a subscription creates a high friction point that likely suppresses new-user conversion rates in a competitive category.
The SWOT
- Localized CSV export provides data-portability barrier
- Multi-unit support removes conversion friction
- Localized pricing in high-ARPU markets
Next best moves
A/B test free-tier Apple Health read-only access because gating basic sync limits the top-of-funnel conversion → increase user base
The counter-intuitive read
The app's local-first storage is not a privacy…
Read the full takeBottom line
BMI Calculator・Weight Diary must pivot its Apple Health integration to a freemium model to compete with platform-native health apps, as the current paywall limits the user base before they can experience the app's core utility.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeSources
- [1] App Store
Report last updated