# Gt vs D

The clearest difference is iOS requirement: D at 15.0 against Gt's 17.4. 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.

Gt ships an update weekly, D every 5 days. Both last shipped on October 6, 2026.

## The numbers

| Metric | Gt | D |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free | — |
| Size | 55 MB | 30 MB |
| Requires iOS | 17.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Athanasios Farmakis](https://appshunter.io/developer/1711239231) | [LUN LIU](https://appshunter.io/developer/1890125123) |

## What reviewers say

### Gt

[App page](https://appshunter.io/ios/app/gt-flasher/id6469004059)

This application enables users to log and configure modern engine and gearbox management systems. It utilizes the UDS protocol over OBD II with open-source OBD BLE devices. The app supports programming recovery for most platforms if a configuration procedure is interrupted.

**Highlights:** Log engine management systems, Configure gearbox management systems, UDS protocol support, OBD II connectivity, Open source OBD BLE device compatibility, Programming recovery feature

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-sync-ecu/id6761677479)

**In-app purchases:** none


## Frequently asked questions

### Is Gt free?

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

### Is D free?

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

### Do Gt or D have ads?

Neither Gt nor D shows ads.

### Which is updated more often, Gt or D?

Gt ships an update weekly, and D every 5 days. Most recently, Gt was updated on October 6, 2026 and D on October 6, 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.*