e85Cal vs Tune Delivery Network (TDN)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e85Cal
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.
- 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 %
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e85Cal help you calculate your ethanol percentage goal. It fast, simple, and easy to use. Just enter the following information: 1) How big is your gas tank? 2) What is the ethanol % in the standard pump gas? 3) What is the ethanol % in the ethanol pump gas? 4) What is your target ethanol % mix goal? 5) What is your current ethanol % min in your vehicle? 6) What is your current fuel level % in your vehicle? Results will display how many gallons or liters of standard and ethanol gas to pump in your vehicle based on your input.
Tune Delivery Network (TDN)
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.
- Receive custom vehicle tunes
- Works with TDN devices
- Direct tune delivery
- Requires compatible hardware
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The Tune Delivery Network app enables your TDN tuner to send you their tunes for your vehicle. An HP Tuners RTD+, MPVI3, MPVI2+, or other TDN-compatible delivery device is required. Please note that this app is designed for users who have a relationship with a tuner that is part of the TDN system, and is not intended as a solution for self-tuners or non-TDN tuners.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | e85Cal | Tune Delivery Network (TDN) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (37 ratings) — better | 2.4 (38 ratings) |
| Positive reviews | 83.3% of reviews — better | 14.5% of reviews |
| Number of ratings | 37 | 38 — better |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.1 — better | 13.1 |
| Further details — not scored | ||
| Size | 15 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Joe | HP Tuners LLC |
Customer experience
e85Cal
Tune Delivery Network (TDN)
Bugs and requests
e85Cal
Not enough reviews yet to summarise bugs or requests.
Tune Delivery Network (TDN)
Reported bugs
4 issues- 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
3 requests- 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
In-app purchases
e85Cal
No in-app purchases
Tune Delivery Network (TDN)
No in-app purchases
Questions
Is e85Cal free?
Is Tune Delivery Network (TDN) free?
Which has better reviews, e85Cal or Tune Delivery Network (TDN)?
Do e85Cal or Tune Delivery Network (TDN) have ads?
Which is updated more often, e85Cal or Tune Delivery Network (TDN)?
Other comparisons
