# e85Cal vs Tune Delivery Network (TDN)

The clearest difference is review sentiment: e85Cal at 83% against Tune Delivery Network (TDN)'s 14%. e85Cal also leads on rating (4.7 vs 2.4). Tune Delivery Network (TDN)'s advantage is update cadence (fortnightly vs every 4 months). On price, ratings volume, 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.

e85Cal holds the better App Store score, 4.7 against 2.4. Both are backed by a comparable volume of ratings — 37 and 38 respectively. Written reviews point the same way: 83% of e85Cal's written reviews are positive against 14% of Tune Delivery Network (TDN)'s.

e85Cal ships an update every 4 months, Tune Delivery Network (TDN) fortnightly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | e85Cal | Tune Delivery Network (TDN) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (37 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** | [2.4 (38 ratings)](https://appshunter.io/ios/app/tune-delivery-network-tdn/id1590560864/reviews) |
| Number of ratings | 37 | **38** |
| Positive reviews | **83.3% of reviews** | 14.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 15 MB | 61 MB |
| Requires iOS | **12.1** | 13.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Joe](https://appshunter.io/developer/1132486512) | [HP Tuners LLC](https://appshunter.io/developer/1767627066) |

## What reviewers say

### e85Cal

[App page](https://appshunter.io/ios/app/e85cal/id1470313135)

This app assists users in calculating the precise amounts of standard and ethanol gasoline needed to achieve a desired ethanol percentage in their fuel mix. It simplifies the process by taking into account tank size, current fuel level, and the ethanol content of available fuel types.

**Highlights:** Calculate ethanol percentage goal, Enter gas tank size, Input standard pump gas ethanol %, Input ethanol pump gas ethanol %, Set target ethanol % mix, Enter current fuel level %

**Features:** macOS Compatibility

**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 e85Cal free?

e85Cal 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, e85Cal or Tune Delivery Network (TDN)?

e85Cal is rated higher. e85Cal averages 4.7 out of 5 from 37 ratings, while Tune Delivery Network (TDN) averages 2.4 from 38 ratings.

### Do e85Cal or Tune Delivery Network (TDN) have ads?

Neither e85Cal nor Tune Delivery Network (TDN) shows ads.

### Which is updated more often, e85Cal or Tune Delivery Network (TDN)?

e85Cal ships an update every 4 months, and Tune Delivery Network (TDN) fortnightly. Most recently, e85Cal was updated on November 3, 2026 and Tune Delivery Network (TDN) on November 7, 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.*