Gear Ratio Calculator & RPM is a specialized utility for engineers and hobbyists to compute gear ratios and mechanical advantage on iOS.
The App DNA
What makes this app unique?
The app removes the connectivity dependency and spreadsheet friction that plague standard web-based calculators, serving users who need reliable, offline mechanical data at the bench.
For Engineers, machinists, robotics hobbyists, and cyclists who need to calculate mechanical advantage and gear ratios for specific hardware setups.
What does it look like?
Key features
Calculates required tooth counts from 8T to 96T based on a target ratio, ranking practical pairs for reduction or overdrive.
Computes gear ratio, output RPM, and mechanical advantage in real-time as tooth counts are entered.
Searchable library of 24 gear types including spur, helical, bevel, planetary, and worm drives with use-case documentation.
How much does it cost?
Monetization relies on a flexible subscription model to capture both short-term project users and long-term professionals.
Velocity
Maintenance developmentnew contentUX improvementsShow more...
With two releases over the last three months, the app operates at a maintenance cadence of approximately 0.15 releases per week. Development is currently focused on expanding core utility, as evidenced by the latest release adding a gear catalog, saved configurations, and calculation tools. The development trend is stable, characterized by infrequent but feature-rich updates rather than rapid iteration.
Who built it?
Linh Phan Nhat Khanh
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球星卡掃描估值 TCGUser 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 Gear Ratio Calculator & RPM
How's the Utilities market?
Gear Ratio Calculator & RPM occupies the specialized mechanical utility segment, differentiating itself from general-purpose calculators through its offline-first architecture and reverse-solver logic.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Gear Ratio Calculator & RPM
Where is it heading?
The mechanical utility market is consolidating around tools that provide specific, offline-capable workflows. Gear Ratio Calculator & RPM is well-positioned to serve professional segments that value precision over the convenience of free web tools.
- The latest release added a reverse-solver and gear catalog, signaling active feature investment rather than maintenance-mode stagnation.
- The subscription-only model creates a high barrier to entry that may limit the user base to professional segments.
The SWOT
- Offline-first architecture removes connectivity dependency required by web-based rivals
- Reverse-solver logic provides specific utility standard division tools lack
- Saved-setup management increases switching costs for professional users
- Localized pricing in high-ARPU manufacturing markets could capture users relying on ad-heavy web tools
Next best moves
Expand gear reference catalog because the current 24-gear limit is a potential churn risk against free web alternatives → increase retention
The counter-intuitive read
Users report: The subscription model is an advantage, not a barrier…
Read the full takeBottom line
The offline-first architecture and reverse-solver logic provide a defensible utility for professional users, but the subscription model requires a deeper gear catalog to justify the cost against free web alternatives.
Unlock 1 critical friction, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Gear Ratio Calculator & RPM free to use?
Does Gear Ratio Calculator & RPM work without internet?
How does this compare to a free web calculator?
What gear types are included in the reference catalog?
Sources
- [1] App Store, source
Report last updated