# EngineCalc vs AutoTech

The clearest difference is review sentiment: AutoTech at 100% against EngineCalc's 60%. EngineCalc's advantage is update cadence (every 2 months vs every 32 months) and price ($0.99 vs $1.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

EngineCalc costs $0.99 and AutoTech $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EngineCalc ships an update every 2 months, AutoTech every 32 months. The most recent releases landed on September 21, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | EngineCalc | AutoTech |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/enginecalc/id378824382/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 32 months |
| Monetization | Paid | Paid |
| Size | 8 MB | 2 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iTrinity, Inc.](https://appshunter.io/developer/547108075) | [Steven Clarner](https://appshunter.io/developer/410979939) |

## What reviewers say

### EngineCalc

[App page](https://appshunter.io/ios/app/enginecalc/id378824382)

This utility app provides a collection of essential formulas and calculators for powersports and engine tuning. It allows users to perform complex calculations directly on their iPhone, eliminating the need for a laptop or desktop computer.

**Highlights:** Powersports formulas, Engine tuning calculators, Actual Volume Flow, Air Density, Compression Ratio, Cylinder Displacement, Volumetric Efficiency

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

**In-app purchases:** none


### AutoTech

[App page](https://appshunter.io/ios/app/autotech/id410979934)

This automotive calculator provides quick computations for over 45 formulas across various vehicle systems. It supports both U.S. and metric units, making it a versatile tool for mechanics, technicians, and enthusiasts.

**Highlights:** 45+ automotive formulas, Aerodynamics calculations, Chassis calculations, Drivetrain calculations, Engine calculations, Performance calculations, Suspension calculations, Tire calculations

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

**In-app purchases:** none


## Frequently asked questions

### Is EngineCalc free?

EngineCalc costs $0.99, with no in-app purchases.

### Is AutoTech free?

AutoTech costs $1.99, with no in-app purchases.

### Do EngineCalc or AutoTech have ads?

Neither EngineCalc nor AutoTech shows ads.

### Which is updated more often, EngineCalc or AutoTech?

EngineCalc ships an update every 2 months, and AutoTech every 32 months. Most recently, EngineCalc was updated on September 21, 2026 and AutoTech on September 29, 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.*