# Engine Calculator Plus vs Tinker Tracker

The clearest difference is review sentiment: Tinker Tracker at 100% against Engine Calculator Plus's 13%. Tinker Tracker also leads on price (Free vs $2.99) and rating (5.0 vs 4.0). Engine Calculator Plus's advantage is chart position (#183 vs unranked) and iOS requirement (13 vs 16.6). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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

Tinker Tracker holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 13% of Engine Calculator Plus's written reviews are positive against 100% of Tinker Tracker's.

Engine Calculator Plus ships an update every 48 months, Tinker Tracker every 9 months. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Engine Calculator Plus | Tinker Tracker |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tinker-tracker/id6740008900/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 12.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 9 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#183** | — |
| Size | 2 MB | 31 MB |
| Requires iOS | **13** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [7TH REALM LABS LLC](https://appshunter.io/developer/1787939555) |

## What reviewers say

### Engine Calculator Plus

[App page](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764)

**Currently charting:** #183 Top Paid · Productivity (US App Store)

Calculate engine specifications for various car and plane engines, including displacement, compression ratio, and horsepower. Supports metric and imperial systems with a user-friendly interface and 3D engine visualization.

**Highlights:** Engine displacement calculation, Compression ratio calculation, Horsepower estimation, Metric and Imperial support, 3D engine display, Copyable results

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

**In-app purchases:** none


### Tinker Tracker

[App page](https://appshunter.io/ios/app/tinker-tracker/id6740008900)

This app helps automotive enthusiasts track, organize, and manage vehicle restoration and repair projects. It allows for detailed project logging, parts and expense management, and customizable build tracking, all with secure local data storage.

**Highlights:** Detailed project tracking, Parts and expenses management, Customizable build organization, Secure local data storage, In-app browser for parts search, Community forum integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Engine Calculator Plus free?

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

### Is Tinker Tracker free?

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

### Which has better reviews, Engine Calculator Plus or Tinker Tracker?

Tinker Tracker is rated higher. Engine Calculator Plus averages 4.0 out of 5 from 1 ratings, while Tinker Tracker averages 5.0 from 1 ratings.

### Do Engine Calculator Plus or Tinker Tracker have ads?

Neither Engine Calculator Plus nor Tinker Tracker shows ads.

### Which is updated more often, Engine Calculator Plus or Tinker Tracker?

Engine Calculator Plus ships an update every 48 months, and Tinker Tracker every 9 months. Most recently, Engine Calculator Plus was updated on September 10, 2026 and Tinker Tracker on September 17, 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.*