# iGearbox vs Geometry Calculator Plus

The clearest difference is update cadence: Geometry Calculator Plus at every 23 months against iGearbox's every 55 months. Geometry Calculator Plus also leads on price ($2.99 vs $4.99). iGearbox's advantage is iOS requirement (12.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

iGearbox costs $4.99 and Geometry Calculator Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iGearbox ships an update every 55 months, Geometry Calculator Plus every 23 months. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | iGearbox | Geometry Calculator Plus |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | **[3.0 (6 ratings)](https://appshunter.io/ios/app/igearbox/id451320370/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 55 months | **Every 23 months** |
| Monetization | Paid | — |
| Size | 12 MB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### iGearbox

[App page](https://appshunter.io/ios/app/igearbox/id451320370)

This app provides interactive tools to calculate gearbox ratios for regular and planetary gearboxes. It features a drag-and-drop design environment for gear trains and a dynamic graphic simulation for planetary gear sets, aiding in understanding and calculation.

**Highlights:** Interactive gear train design, Planetary gear set simulation, Ratio and speed calculations, Multiple gear train configurations, Dynamic component motion animations, Symbolic ratio equations, Dropbox data upload

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Geometry Calculator Plus

[App page](https://appshunter.io/ios/app/geometry-calculator-plus/id1631941395)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iGearbox free?

iGearbox costs $4.99, with no in-app purchases.

### Is Geometry Calculator Plus free?

Geometry Calculator Plus costs $2.99, with no in-app purchases.

### Do iGearbox or Geometry Calculator Plus have ads?

Neither iGearbox nor Geometry Calculator Plus shows ads.

### Which is updated more often, iGearbox or Geometry Calculator Plus?

iGearbox ships an update every 55 months, and Geometry Calculator Plus every 23 months. Most recently, iGearbox was updated on October 14, 2026 and Geometry Calculator Plus on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*