# CEI vs Turbo Key

The clearest difference is iOS requirement: Turbo Key at 13.0 against CEI's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | CEI | Turbo Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/turbo-key/id1522398781/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free |
| Size | 93 MB | 10 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CEI - Costruzione Emiliana Ingranaggi](https://appshunter.io/developer/1141884214) | [Turbokey LLC](https://appshunter.io/developer/1522398783) |

## What reviewers say

### CEI

[App page](https://appshunter.io/ios/app/cei/id1141884215)

**Features:** macOS Compatibility

**In-app purchases:** none


### Turbo Key

[App page](https://appshunter.io/ios/app/turbo-key/id1522398781)

Easily identify, quote, and sell heavy-duty truck turbochargers. Access over 18,300 cross-references and request pricing and availability using ESN or VIN. Includes helpful tips for longevity and sales.

**Highlights:** 18,300+ OE cross references, ESN/VIN lookup for price/availability, Turbocharger sales assistance, Recommended add-on products, Failure analysis section

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

**In-app purchases:** none


## Frequently asked questions

### Is CEI free?

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

### Is Turbo Key free?

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

### Do CEI or Turbo Key have ads?

Neither CEI nor Turbo Key shows ads.

### Which is updated more often, CEI or Turbo Key?

CEI ships an update every 3 months, and Turbo Key every 3 months. Most recently, CEI was updated on November 2, 2026 and Turbo Key on November 3, 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.*