# AutoTech vs Carburetor CFM

The clearest difference is price: Carburetor CFM at Free against AutoTech's $1.99. Carburetor CFM also leads on update cadence (every 6 days vs every 32 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Carburetor CFM is free to download; AutoTech costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AutoTech ships an update every 32 months, Carburetor CFM every 6 days. The most recent releases landed on September 10, 2026 and December 3, 2025 respectively.

## The numbers

| Metric | AutoTech | Carburetor CFM |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 6 days** |
| Monetization | Paid | — |
| Size | 2 MB | 40 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Steven Clarner](https://appshunter.io/developer/410979939) | [STAGE CODING, Travnik](https://appshunter.io/developer/1637068135) |

## What reviewers say

### 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


### Carburetor CFM

[App page](https://appshunter.io/ios/app/carburetor-cfm/id1619682005)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AutoTech free?

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

### Is Carburetor CFM free?

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

### Do AutoTech or Carburetor CFM have ads?

Neither AutoTech nor Carburetor CFM shows ads.

### Which is updated more often, AutoTech or Carburetor CFM?

AutoTech ships an update every 32 months, and Carburetor CFM every 6 days. Most recently, AutoTech was updated on September 10, 2026 and Carburetor CFM on December 3, 2025.

---

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