Spur Gear Calculator
Spur Gear Calculator is a specialized engineering utility for calculating spur gear dimensions and ratios on iOS.
The App DNA
What makes this app unique?
Engineers require quick, reliable reference calculations for spur gear systems to verify design parameters during mechanical assembly.
For Mechanical engineers and technicians requiring quick reference calculations for spur gear systems.
What does it look like?
Key features
Calculates outside diameter, center distance, and ratio based on diametral pitch or module and tooth count.
Supports two specific gear systems: Diametral Pitch and Module.
How much does it cost?
Spur Gear Calculator is distributed as a free utility with no in-app purchases or subscription tiers.
Velocity
Dormant developmentplatform expansionUX improvementsShow more...
Spur Gear Calculator has been inactive for 3,294 days, indicating the project is no longer under active development. The final release focused on platform compatibility for watchOS 27 and minor UI adjustments. There is no evidence of ongoing maintenance or feature updates, confirming a zombie status.
Who built it?
SpiralArm Consulting
4 apps tracked · Utilities
DaysLeft
Gear Lab Pro
Gear LabUser 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 Spur Gear Calculator
How's the Utilities market?
Spur Gear Calculator maintains a niche presence as a free utility for mechanical design. The lack of updates since 2017 suggests a static position that does not compete with modern, frequently updated engineering tools.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Spur Gear Calculator
Where is it heading?
The market for engineering utilities is shifting toward web-based platforms that offer frequent updates and broader gear system support. Spur Gear Calculator remains in a maintenance-only state, which will likely lead to further decline in relevance as users prioritize tools that support modern gear design requirements.
- The nine-year development gap indicates a lack of maintenance, which risks future compatibility with evolving mobile operating systems.
- The absence of helical gear support limits the tool's utility, pushing professional users toward more comprehensive, updated engineering alternatives.
The SWOT
- Focused utility design provides specific calculations for spur gears and pinions.
- Free distribution model removes financial barriers for professional and student users.
- Integration of helical gear calculations would expand the addressable user base.
- Modernizing the interface could improve usability for technicians requiring quick reference calculations.
Next best moves
Sunset the product because the development cadence has been dormant for nine years → reallocate resources to active projects.
The counter-intuitive read
The lack of updates is not a failure but a feature…
Read the full takeSince the last report: The outlook for Spur Gear Calculator has shifted from stable to declining due to increased competitive pressure from web-based engineering tools and concerns over long-term OS compatibility. While the product remains in a maintenance-only state, the analysis now explicitly frames the lack of updates as a liability for professional workflows.
Bottom line
Spur Gear Calculator serves as a legacy reference tool that lacks the development cadence to remain competitive against modern engineering utilities, suggesting that sunsetting the product would allow for a cleaner portfolio focus.
Unlock 2 critical frictions, 2 market threats and the analyst’s take.
Access the full report for freeFAQ
Is Spur Gear Calculator suitable for helical gear design?
Does Spur Gear Calculator require a subscription?
What alternatives exist for mechanical gear calculations?
Sources
- [1] App Store
Report last updated