Light Calc is a utility for lighting designers and engineers to calculate illuminance and light power density on iOS.
Product velocity
Dormant
Daily rank 🇺🇸
—
Utilities
Sentiment
1.0
2 reviews
Nemesis
Fragmented field
The App DNA
What makes this app unique?
The tool removes the friction of manual field calculations by providing a dedicated interface for rapid data entry and export.
For Professional lighting designers, architects, interior designers, and engineers requiring quick field calculations.
What does it look like?
Key features
Calculates illuminance levels and light power density based on input parameters.
Saves calculation results as images to the device photo library.
Sends calculation data via email for external documentation.
How much does it cost?
Light Calc is distributed as a free utility with no visible in-app purchases or subscription tiers.
Velocity
Dormant developmentopaqueShow more...
Light Calc has seen no development activity for 4,332 days. The project appears to be abandoned, as there have been no feature updates, bug fixes, or maintenance releases in over a decade. The last recorded update provided minor functional improvements, but the lack of any subsequent activity confirms a zombie status.
Who built it?
User Sentiment
What do users think recently?
Recent user voice shows a frustrated sentiment. Users appreciate the save button located above the keyboard provides a clear finalization step for user inputs.
How are ratings & reviews evolving?
What users say, by theme
- The save button located above the keyboard provides a clear finalization step for user inputs
- The app fails to provide output data for footcandle measurements despite trying multiple design types
2 of 2 recent reviews analyzed · limited sample
Read the full review analysisCompetition
Competitive landscape for Light Calc: Lighting Calculator for Lighting Designers
How's the Utilities market?
Light Calc operates as a specialized utility with no recent updates since 2014. The lack of functional measurement output in the current version significantly undermines its position as a professional tool.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Light Calc: Lighting Calculator for Lighting Designers
Where is it heading?
The professional utility market is shifting toward cloud-integrated tools with active update cadences. Light Calc remains in a dormant state, and the current output failures suggest it will continue to lose relevance unless the core calculation engine is repaired.
- The failure to return footcandle values in the latest version breaks the core value proposition, leading to negative sentiment.
- The 11-year development gap indicates a lack of active maintenance, which erodes professional trust in the tool's accuracy.
The SWOT
- Clear save button location above the keyboard
- Update calculation engine to restore professional utility
Next best moves
Audit calculation engine because users report missing footcandle output → restore core utility
The counter-intuitive read
The app's 11-year abandonment is its primary feature: it remains a lightweight…
Read the full takeSince the last report: The app's functional state remains unchanged, with no updates since 2014 and persistent calculation failures. The primary shift is a change in the analytical perspective, which now positions the app's long-term dormancy as a potential benefit for users seeking to avoid modern software subscription models.
Bottom line
Light Calc requires an immediate audit of its calculation logic to restore basic functionality, as the current failure to output footcandle values renders the tool unusable for its target professional audience.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Light Calc suitable for professional lighting design work?
Does Light Calc offer a paid version with more features?
Is Light Calc still being updated?
Sources
- [1] App Store, source
Report last updated