ChartEye is a vision-screening utility for individuals and educators that generates Snellen-standard eye charts on-screen or as printable PDFs.
The App DNA
What makes this app unique?
It removes the friction of sourcing physical eye charts by using a bank-card calibration mechanism to ensure clinical-style accuracy on any device screen.
For Individuals performing at-home vision screening and educators requiring classroom-ready eye charts.
What does it look like?
Key features
Displays or prints Snellen-standard eye charts with rows from 20/200 to 20/20.
Randomized Tumbling E chart for children or non-Latin alphabet readers.
Uses a physical bank card to calibrate screen size for accurate letter scaling.
How much does it cost?
The one-time purchase model avoids recurring subscription friction, appealing to users who need a screening tool only occasionally.
Velocity
Maintenance developmentUX improvementsinternationalizationShow more...
ChartEye has shipped 2 releases over the last 6 months, averaging approximately 0.08 releases per week. This cadence places the app in the maintenance tier, characterized by infrequent updates focused on core functionality rather than rapid feature iteration. The latest version demonstrates a focus on technical refinement and internationalization, though the overall development pace remains slow. The app is currently stable with no evidence of a shift toward live operations.
Who built it?
Jhomar Maravillas
13+ apps tracked · Productivity
Rangely: Vocal Range Test
Wordly: Word to PDF
Nutrily: Nutrition Label Maker
Releasely: Model Release
Negativo - Negative Scanner
Paintly: Photo to Painting
Stamply: Date Stamp Photo
Seatly: Seating Chart Maker
Badgely: Name Badge Maker
Foldly: Booklet PDF
Traily: GPX Viewer
Beadly: Perler Bead PatternUser 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 ChartEye: Eye Chart
How's the Productivity market?
ChartEye operates in the Productivity category, leveraging a one-time $4.99 unlock to differentiate from subscription-based health utilities. The latest release (v1.0.3) focuses on measurement accuracy to maintain category authority.
Read the market outlookThe rivals identified
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Key takeaways for ChartEye: Eye Chart
Where is it heading?
The vision-screening market is shifting toward accessible, on-device tools that replace physical charts. ChartEye is well-positioned to capture this segment by maintaining a low-friction, one-time payment model that appeals to casual users.
- The latest release rebuilt the measuring engine, demonstrating active investment in core accuracy rather than maintenance-only updates.
- The one-time $4.99 purchase model provides a stable revenue stream without the churn risk associated with subscription-based health apps.
The SWOT
- Card calibration mechanism ensures clinical-style accuracy
- One-time purchase model avoids subscription friction
- Tumbling E chart expands pediatric screening utility
- Localized pricing in high-ARPU markets
- B2B distribution into school districts
Next best moves
Ship screening-result logging because users need to track vision changes over time → increase retention
The counter-intuitive read
The lack of a subscription is ChartEye's primary asset…
Read the full takeBottom line
ChartEye's focus on true-size accuracy and a one-time purchase model creates a defensible position against ad-heavy, subscription-based rivals. Prioritizing the integration of basic screening-result logging would unlock higher user retention for families tracking vision changes over time.
Unlock 3 critical frictions, 2 market threats and the analyst’s take.
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