# Gear Calculator Plus vs CalcEngineer

The clearest difference is review sentiment: CalcEngineer at 100% against Gear Calculator Plus's 0%. CalcEngineer also leads on price (Free vs $2.99) and rating (5.0 vs 3.6). Gear Calculator Plus's advantage is iOS requirement (13 vs 17). On ratings volume, ads, in-app purchases and device support there is nothing between them.

CalcEngineer is free to download; Gear Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CalcEngineer holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 0% of Gear Calculator Plus's written reviews are positive against 100% of CalcEngineer's.

Gear Calculator Plus ships an update every 29 months, CalcEngineer every 2 days. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Gear Calculator Plus | CalcEngineer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.6 (5 ratings)](https://appshunter.io/ios/app/gear-calculator-plus/id1094652540/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calcengineer/id6748969344/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 2 days** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 10 MB |
| Requires iOS | **13** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Justin Bush](https://appshunter.io/developer/1828308327) |

## What reviewers say

### Gear Calculator Plus

[App page](https://appshunter.io/ios/app/gear-calculator-plus/id1094652540)

Calculate a car's theoretical speed in any gear based on engine RPM, transmission, differential ratios, and tire size. It can also determine travel distance per engine revolution and estimate top speed for each gear. Supports both metric and imperial units.

**Highlights:** Calculate theoretical speed per gear, Calculate travel distance per engine revolution, Determine top speed for each gear, Metric or Imperial units, Universal app for iPhone and iPad

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

**In-app purchases:** none


### CalcEngineer

[App page](https://appshunter.io/ios/app/calcengineer/id6748969344)

This app provides professional engineering calculations for compressed air systems. It helps engineers and technicians determine CFM requirements, size compressors and tanks, and analyze pressure drops for optimized pneumatic systems.

**Highlights:** CFM Calculator, Compressor & Tank Sizing, Pressure Drop Analysis, Flow Velocity & Pipe Sizing, Multiple CFM Entries, General Engineering Calculator Suite

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gear Calculator Plus free?

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

### Is CalcEngineer free?

CalcEngineer is free to download, with no in-app purchases.

### Which has better reviews, Gear Calculator Plus or CalcEngineer?

CalcEngineer is rated higher. Gear Calculator Plus averages 3.6 out of 5 from 5 ratings, while CalcEngineer averages 5.0 from 2 ratings.

### Do Gear Calculator Plus or CalcEngineer have ads?

Neither Gear Calculator Plus nor CalcEngineer shows ads.

### Which is updated more often, Gear Calculator Plus or CalcEngineer?

Gear Calculator Plus ships an update every 29 months, and CalcEngineer every 2 days. Most recently, Gear Calculator Plus was updated on October 6, 2026 and CalcEngineer on October 15, 2026.

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