---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "Spur Gear Calculator"
developer_entity: "SpiralArm Consulting Limited"
bundle_id: "com.ultrascale.SGC"
app_store_id: "827110560"
category: "Utilities"
primary_platform: "ios"
primary_monetization: "Free"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2017-08-29"
report_date: "2026-09-05"
last_verified: "2026-09-05T00:00:00.000Z"
report_version: "4.0.0"
total_reviews: 3
overall_rating: 3.7
confidence: "low"
confidence_score: 0
data_age_days: 70
momentum_velocity: "zombie"
intelligence_version: 3
tags: ["utilities", "free", "mobile app", "app review", "app analysis", "mechanical", "engineers", "technicians"]
canonical_url: "https://marlvel.ai/apps/spur-gear-calculator"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# Spur Gear Calculator Intelligence Report

## TL;DR {#tldr}

- **Category**: Utilities · Free
- **Signal**: Rating 3.67

> **TL;DR:** Spur Gear Calculator is a utilities app by SpiralArm Consulting Limited, rated 3.67/5 by 3 users, available on iOS.
>
> **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** Spur Gear Calculator is a utilities app by SpiralArm Consulting Limited.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Rating** | 3.67/5 (3 reviews) |
| **Category** | Utilities |
| **Developer** | SpiralArm Consulting Limited |
| **Pricing** | Free |
| **Platforms** | iOS |
| **Confidence** | Low (0/1.0) |
| **Data Age** | 70d |

## Metadata & Market Performance
- **Publisher:** SpiralArm Consulting Limited
- **Category:** Utilities
- **Target Audience:** Mechanical engineers and technicians requiring quick reference calculations for spur gear systems.
- **Platforms:** iOS
- **Version Reviewed:** 4.0.0
- **Report Date:** 2026-09-05
- **Signal Count:** 0 reviews analyzed
- **Confidence:** Low (0/1.0)
- **App Store ID (iOS):** 827110560
- **Bundle ID:** com.ultrascale.SGC
- **Performance Trend:** Declining
- **Data Window:** Analysis based on signals collected up to 2026-09-05

<!-- section:executive-snapshot -->
## Executive Snapshot
**What it is:** Spur Gear Calculator is a specialized engineering utility for calculating spur gear dimensions and ratios on iOS.
**Why users hire it:** Engineers require quick, reliable reference calculations for spur gear systems to verify design parameters during mechanical assembly.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Standard] Spur Gear Calculation:** Calculates outside diameter, center distance, and ratio based on diametral pitch or module and tooth count.
- **[Standard] Gear System Input:** Supports two specific gear systems: Diametral Pitch and Module.
<!-- /section:features -->

<!-- section:market-position -->
## Market Position {#market-position}

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.
<!-- /section:market-position -->

## Monetization Strategy
- **Model:** Free
- **Tiers:** Free
- **Analysis:** Spur Gear Calculator is distributed as a free utility with no in-app purchases or subscription tiers.

<!-- section:swot -->
## SWOT Analysis {#swot}

**Core Strengths:**
- Focused utility design provides specific calculations for spur gears and pinions.
- Free distribution model removes financial barriers for professional and student users.

**Growth Levers:**
- Integration of helical gear calculations would expand the addressable user base.
- Modernizing the interface could improve usability for technicians requiring quick reference calculations.


<!-- /section:swot -->
## Recent Changes (v2 → v3) {#recent-changes}

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.

**Overall trend**: Declining
**Compared at**: 2026-09-05

### High-impact changes
- **[Declined] Outlook Trend Shift** (positioning)

### Medium-impact changes
- **[Added] New Competitive Threats** (swot)
- **[Added] Alternative Recommendation** (features)

<!-- section:whats-new -->
## What's New

- **Latest (v4.0.0, 9 years ago):** Maintenance update for watchOS 27 compatibility and UI adjustments.
<!-- /section:whats-new -->

<!-- section:momentum -->
## App Momentum (Zombie) {#momentum}

- No updates for over nine years.
- Maintenance-only status limits feature growth.

> **Cadence:** 1 total versions · 0 majors in last 6 months · 3294 days since last update

<!-- /section:momentum -->

<!-- section:so-what -->
## The "So What?" (Strategic Takeaway) {#so-what}

Spur Gear Calculator is an utilities app that is completely free.
It holds a 3.67/5 rating from 3 reviews.

<!-- speakable-start -->
> **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.
<!-- speakable-end -->

**Best for:** Mechanical engineers and technicians requiring quick reference calculations for spur gear systems.

<!-- section:pm-actions -->
### PM Action Plan (Next Best Moves)

- [ ] [SUNSET] Sunset the product because the development cadence has been dormant for nine years → reallocate resources to active projects.
<!-- /section:pm-actions -->

<!-- section:outlook -->
### Outlook: Declining

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.
<!-- /section:outlook -->

<!-- /section:so-what -->

<!-- section:metrics -->
## Key Metrics Summary

| Metric | Value |
| :--- | :--- |
| Overall Rating | 3.67/5 |
| Total Reviews | 3 |
| Confidence | Low |
| Pricing Model | Free |
| Platforms | iOS |
| Key Features | 2 analyzed |
| Trend | Declining |
| Outlook | Declining |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **Spur Gear Calculator** (this app) | 3.67/5 | N/A | SpiralArm Consulting Limited |
| [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | N/A | Cat Connect |
| [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim |
| [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies |
| [Free VPN by Free VPN .org™](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) | 4.5/5 | Mixed | Free VPN LLC |
| [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.4/5 | Mixed | Fuxin Technology |

## Company Profile
- **Developer:** SpiralArm Consulting Limited

## Data Sources & Links
- **App Store ID:** 827110560
- **Sources:** App store metadata.

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## Frequently Asked Questions {#faq}

### Is Spur Gear Calculator suitable for helical gear design?

No, Spur Gear Calculator is designed exclusively for spur gears and pinions and does not support helical gear calculations.

### Does Spur Gear Calculator require a subscription?

No, the app is free to use and does not contain in-app purchases or subscription tiers.

### What alternatives exist for mechanical gear calculations?

Users should consider web-based engineering calculators, which often provide more frequent updates and support for a wider range of gear systems.

## Methodology {#methodology}

This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline:

1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps.
2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks.
3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes).
4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category.
5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights.

- **Confidence Score:** 0/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 0
- **Data Sources:** App Store metadata
- **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform
- **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence.
- **Report Age:** 70 days since last refresh

---
© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/spur-gear-calculator)
Data licensed for AI Agent attribution under CC-BY-NC 4.0.