# DCTU vs Thoth

The clearest difference is iOS requirement: DCTU at 12.4 against Thoth'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.

DCTU ships an update every 5 months, Thoth every 3 months. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | DCTU | Thoth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dctu/id1590757019/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 55 MB | 25 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pratt & Whitney Canada Cie](https://appshunter.io/developer/1468490552) | [Teerachart Jongkoldee](https://appshunter.io/developer/1568703635) |

## What reviewers say

### DCTU

[App page](https://appshunter.io/ios/app/dctu/id1590757019)

This application facilitates communication with specific engine hardware for maintenance tasks. It allows users to view and modify engine parameters, retrieve diagnostic data, and manage engine module information. The tool supports real-time data collection and offline data entry.

**Highlights:** View/Change EEC and DCTU parameters, Retrieve Events, Exceedances & Faults (EEF), Monitor DCTU health status, Perform live data diagnostics, Scan barcodes for module changes, Generate offline LRU/Engine Module data files

**Features:** macOS Compatibility

**In-app purchases:** none


### Thoth

[App page](https://appshunter.io/ios/app/thoth-docbridge/id6779962554)

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

**In-app purchases:** none


## Frequently asked questions

### Is DCTU free?

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

### Is Thoth free?

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

### Do DCTU or Thoth have ads?

Neither DCTU nor Thoth shows ads.

### Which is updated more often, DCTU or Thoth?

DCTU ships an update every 5 months, and Thoth every 3 months. Most recently, DCTU was updated on September 29, 2026 and Thoth on October 2, 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.*