Focus Chart is a specialized utility for cinematographers and camera assistants that displays Siemens Star patterns for lens and back-focus calibration on iOS.
The App DNA
What makes this app unique?
The tool removes the need for physical calibration charts, providing a portable, high-resolution alternative that fits into a standard camera-assistant workflow.
For Cinematographers, photographers, and camera assistants requiring a portable tool for lens calibration.
What does it look like?
Key features
High-resolution Siemens Star graphic for testing camera focus and lens sharpness. Brand authority lever: establishes the developer as a professional tool provider.
Prevents the device from entering standby mode during calibration. Retention lever: maintains the app as a reliable utility for long sessions.
How much does it cost?
The app operates as a free utility to build brand recognition for the developer's paid professional cinematography software.
Velocity
Dormant developmentopaqueShow more...
Focus Chart shows no development activity for over six years. With only one version ever recorded in the analyzed window and no updates since 2019, the app is effectively abandoned. There is no evidence of ongoing maintenance, feature development, or live operations.
Who built it?
Cadrage
4 apps tracked · Photo & Video
Cadrage Director's Viewfinder
f8 Lens Toolkit
Cadrage StudioUser Sentiment
What do users think recently?
The recent review mood reads thrilled. Users appreciate the back focus chart provides professional utility without the high cost of competing industry tools and the application design remains simple and focused, avoiding unnecessary features that clutter the user experience.
How are ratings & reviews evolving?
What users say, by theme
- The back focus chart provides professional utility without the high cost of competing industry tools
- The application design remains simple and focused, avoiding unnecessary features that clutter the user experience
2 of 2 recent reviews analyzed · limited sample
Read the full review analysisCompetition
Competitive landscape for Focus Chart
How's the Photo & Video market?
Focus Chart serves a niche professional audience within the Photo & Video category, maintaining a 4.4-star rating across 9 total ratings. The lack of updates for 2,500 days indicates the app is a legacy utility rather than a growth-focused product.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Focus Chart
Where is it heading?
The professional cinematography utility market is stable, but Focus Chart's long-term inactivity leaves it vulnerable to technical obsolescence. The PM should prioritize a basic compatibility audit to ensure the tool continues to serve its purpose as a brand-authority anchor for the developer's broader software suite.
- The 2,500-day update gap indicates the app is in maintenance mode, which limits growth but preserves the core utility for existing users.
- The lack of recent development leaves the app exposed to future OS-level display changes that could break the core wake-lock functionality.
The SWOT
- Siemens Star graphic provides a professional-grade calibration standard
- Display wake-lock ensures reliability during extended calibration sessions
- Modernizing the display wake-lock for current OS standards
- Cross-promoting the developer's paid cinematography suite to existing users
Next best moves
Audit display wake-lock compatibility because the app has not been updated in 2,500 days → ensure core utility remains functional
The counter-intuitive read
The lack of updates is a feature, not a bug…
Read the full takeBottom line
Focus Chart remains a reliable, specialized utility, but the six-year development gap signals that it is a legacy brand-anchor rather than an active product. A technical audit of the wake-lock functionality would ensure the tool remains viable for its professional user base.
Unlock 2 critical frictions, 2 market threats and the analyst’s take.
Access the full report for freeFAQ
Is Focus Chart suitable for professional lens calibration?
Does Focus Chart work on modern iOS versions?
What is the difference between Focus Chart and professional calibration software?
Sources
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