# TTS Tuning vs D

The clearest difference is update cadence: D at every 5 days against TTS Tuning's every 2 months. TTS Tuning's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

TTS Tuning ships an update every 2 months, D every 5 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | TTS Tuning | D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tts-tuning/id6480268967/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 3 MB | 30 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Huan Ma](https://appshunter.io/developer/1068139519) | [LUN LIU](https://appshunter.io/developer/1890125123) |

## What reviewers say

### TTS Tuning

[App page](https://appshunter.io/ios/app/tts-tuning/id6480268967)

This advanced tool enables automotive professionals and enthusiasts to upgrade vehicle hardware and firmware. It connects to a vehicle's interface via an enet adapter cable, simplifying performance enhancements and ensuring compatibility with the latest technology. Robust security features protect data and vehicle stability during upgrades.

**Highlights:** Connects via enet adapter cable, Firmware upgrades, User-friendly interface, Detailed upgrade guidance, Troubleshooting support, Robust security features

**In-app purchases:** none


### D

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

**In-app purchases:** none


## Frequently asked questions

### Is TTS Tuning free?

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

### Is D free?

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

### Do TTS Tuning or D have ads?

Neither TTS Tuning nor D shows ads.

### Which is updated more often, TTS Tuning or D?

TTS Tuning ships an update every 2 months, and D every 5 days. Most recently, TTS Tuning was updated on October 7, 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.*