# Tune Delivery Network (TDN) vs D

The clearest difference is review sentiment: D at 100% against Tune Delivery Network (TDN)'s 14%. D also leads on rating (5.0 vs 2.5). Tune Delivery Network (TDN)'s advantage is update cadence (fortnightly vs monthly) and ratings volume (26 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

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

D holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: Tune Delivery Network (TDN) has 26 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 14% of Tune Delivery Network (TDN)'s written reviews are positive against 100% of D's.

Tune Delivery Network (TDN) ships an update fortnightly, D monthly. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Tune Delivery Network (TDN) | D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (26 ratings)](https://appshunter.io/ios/app/tune-delivery-network-tdn/id1590560864/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/d-shift/id6466145102/reviews)** |
| Number of ratings | **26** | 5 |
| Positive reviews | 14.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | Free |
| Size | 61 MB | 4 MB |
| Requires iOS | **13.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HP Tuners LLC](https://appshunter.io/developer/1767627066) | [Dauntless Devices LLC](https://appshunter.io/developer/1706964112) |

## What reviewers say

### Tune Delivery Network (TDN)

[App page](https://appshunter.io/ios/app/tune-delivery-network-tdn/id1590560864)

This application allows users to receive custom vehicle tunes from their tuner via a compatible TDN delivery device. It facilitates the transfer of performance tuning files directly to your vehicle's tuner. A specific TDN-compatible hardware device is necessary to use this service.

**Highlights:** Receive custom vehicle tunes, Works with TDN devices, Direct tune delivery, Requires compatible hardware

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Flashing tunes fast and easy
- 🚀 Convenient for tuning without a Windows PC
- 👍 Great for remote tuning and diagnostics
- 👍 Works well when tuner sends file

**What reviewers complain about**

- 🐛 Constant connectivity issues
- 🐛 Crashes and freezes frequently
- 🐛 Glitchy and inconsistent performance
- 🐛 Bluetooth disconnection problems
- 🐛 Sync and file transfer issues

**Reported bugs**

- App crashes when trying to read/clear codes or connect to device
- Fails to load tunes or read vehicle data
- Bluetooth connectivity issues prevent basic functions
- Sync and file transfer problems

**Requested features**

- Allow uploading tunes from tuner for personal use
- Add basic tuning functions like KAM reset and crank relearn
- Improve data log viewing and management capabilities


### D

[App page](https://appshunter.io/ios/app/d-shift/id6466145102)

Configure your performance vehicle's sequential shift light wirelessly. This app allows for device setup, firmware updates, and seamless pairing. A compatible shift light device is necessary for operation.

**Highlights:** Wireless pairing, Device configuration, Firmware updates, Official app for D-Shift, Performance vehicle integration

**In-app purchases:** none


## Frequently asked questions

### Is Tune Delivery Network (TDN) free?

Tune Delivery Network (TDN) is free to download, with no in-app purchases.

### Is D free?

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

### Which has better reviews, Tune Delivery Network (TDN) or D?

D is rated higher. Tune Delivery Network (TDN) averages 2.5 out of 5 from 26 ratings, while D averages 5.0 from 5 ratings.

### Do Tune Delivery Network (TDN) or D have ads?

Neither Tune Delivery Network (TDN) nor D shows ads.

### Which is updated more often, Tune Delivery Network (TDN) or D?

Tune Delivery Network (TDN) ships an update fortnightly, and D monthly. Most recently, Tune Delivery Network (TDN) was updated on October 18, 2026 and D on October 17, 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.*