Curtain Calc Pro is a geometric utility for calculating curtain light-blocking effectiveness on iOS.
The App DNA
What makes this app unique?
It replaces manual estimation with a specific coverage ratio, removing the cognitive friction of calculating edge-leak penalties for window treatments.
For Homeowners and interior design enthusiasts calculating curtain coverage for light control.
What does it look like?
Key features
Calculates light-blocking effectiveness using a ratio of curtain area versus window dimensions minus edge-leak penalties.
Persists previous window and curtain measurements via UserDefaults for reuse as prefill templates.
How much does it cost?
Curtain Calc Pro is distributed as a free utility with no visible in-app purchases or subscription gates.
Velocity
Maintenance developmentopaqueShow more...
Curtain Calc Pro has remained in a state of maintenance since its launch 99 days ago. With only a single version released to date, there is no evidence of ongoing development or iterative updates. The lack of subsequent activity suggests the app is currently in a static state with no active feature roadmap.
Who built it?
晓 郭
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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 Curtain Calc Pro
How's the Utilities market?
Curtain Calc Pro occupies a narrow utility niche with no current chart presence or review volume. The lack of updates since the May 2026 release indicates a static product position within the Utilities category.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Curtain Calc Pro
Where is it heading?
The utility market for niche home-design tools is currently stagnant, with little incentive for users to adopt standalone apps over web-based alternatives. Curtain Calc Pro remains exposed to low discoverability until the developer addresses the lack of community signals and update cadence.
- The app has remained in maintenance mode for 99 days, suggesting the developer is not actively pursuing user growth.
- Zero reviews since the May 2026 release indicate a lack of market traction, which limits the ability to iterate based on user needs.
The SWOT
- Geometric coverage engine provides a quantifiable light-blocking ratio that manual methods lack
- Integration of a shopping list feature could create a retail conversion funnel
Next best moves
Audit user acquisition channels because the app has zero reviews after 99 days → increase visibility
The counter-intuitive read
The lack of updates is not a failure but a design choice…
Read the full takeSince the last report: The product remains in a static maintenance state, with no functional updates or shifts in monetization. The primary changes involve a more precise definition of the competitive landscape and the removal of localization as a highlighted feature.
Bottom line
Curtain Calc Pro serves a specific geometric calculation need, but the lack of updates and user feedback suggests a stalled product lifecycle. Establishing a feedback loop or retail partnership would unlock the value of its unique coverage engine.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Curtain Calc Pro free to use?
Does Curtain Calc Pro work offline?
What is the difference between Curtain Calc Pro and a standard tape measure?
Sources
- [1] App Store, source
Report last updated