# eFlexApp vs Tune Delivery Network (TDN)

The clearest difference is rating: eFlexApp at 3.2 against Tune Delivery Network (TDN)'s 2.5. eFlexApp also leads on review sentiment (25% vs 14%). Tune Delivery Network (TDN)'s advantage is update cadence (fortnightly vs monthly) and device support (3 vs 1). 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.

eFlexApp holds the better App Store score, 3.2 against 2.5. Both are backed by a comparable volume of ratings — 10 and 37 respectively. Written reviews point the same way: 25% of eFlexApp's written reviews are positive against 14% of Tune Delivery Network (TDN)'s.

eFlexApp ships an update monthly, Tune Delivery Network (TDN) fortnightly. Both last shipped on November 3, 2026.

## The numbers

| Metric | eFlexApp | Tune Delivery Network (TDN) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (10 ratings)](https://appshunter.io/ios/app/eflexapp/id1526677191/reviews)** | [2.5 (37 ratings)](https://appshunter.io/ios/app/tune-delivery-network-tdn/id1590560864/reviews) |
| Number of ratings | 10 | **37** |
| Positive reviews | **25.0% of reviews** | 14.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | Free |
| Size | 53 MB | 61 MB |
| Requires iOS | 26.6 | **13.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [StepOne Tech Ltd](https://appshunter.io/developer/1388519134) | [HP Tuners LLC](https://appshunter.io/developer/1767627066) |

## What reviewers say

### eFlexApp

[App page](https://appshunter.io/ios/app/eflexapp/id1526677191)

Monitor your eFlexFuel device in real-time, with features varying by device version. Adjust settings like language, temperature units, and theme. Track ethanol content, engine temperature, and more, depending on your specific eFlexFuel model.

**Highlights:** Real-time device monitoring, Adjustable settings (language, temp, theme), Ethanol content tracking, Engine temperature monitoring, Device status checks, Bluetooth connectivity

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is eFlexApp free?

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

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

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

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

eFlexApp is rated higher. eFlexApp averages 3.2 out of 5 from 10 ratings, while Tune Delivery Network (TDN) averages 2.5 from 37 ratings.

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

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

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

eFlexApp ships an update monthly, and Tune Delivery Network (TDN) fortnightly. Most recently, eFlexApp was updated on November 3, 2026 and Tune Delivery Network (TDN) 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.*