Comparison

Tuning vs E

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Tuning

Enhance your car's performance with a tuning module. Adjust settings to match your vehicle and driving style, with modes like Eco, Sport, and Race. Receive instant updates for your car's configuration and the tuning chip's software.

Highlights
  • Car tuning module
  • Customizable settings
  • Eco, Sport, Race driving modes
  • Instant software updates
  • Product support
Features
Read full description

Experience the tuning effect in its most innovative form yet – more power for your car with the tuning module. Fine tune the respective settings to perfectly match your car's specifics and your personal driving style. Map these settings to three easy to the access driving modes Eco, Sport and Race. Download the free Tuning Pro app now and experience your car on a whole new level with our tuning module. The Tuning: Pro app not only allows for a new driving experience but also sets the standard in product support. Updates for your car's tuning configuration and the tuning chip's software will be available instantaneously through the app.

About

E

This app connects wirelessly to an EFI system, allowing users to monitor engine data and adjust various settings like air-fuel ratios and ignition timing. It offers a setup wizard for initial calibration and advanced tuning options for performance optimization.

Highlights
  • Bluetooth ECU communication
  • Live tuning of ECU settings
  • Real-time engine and sensor data monitoring
  • Setup Wizard for base calibration
  • Advanced tuning functions
  • Diagnostic troubleshooting page
  • Vivid gauge displays
Features
Read full description

E-Tuner 4 is Edelbrock's latest exclusive iOS app for the Pro-Flo 4 and EZ Street EFI Systems. E-Tuner 4 communicates with your PF4 or EZ Street ECU via Bluetooth, so you can manage and live-tune a variety of ECU settings such as air-fuel ratios, ignition timing, idle speed, acceleration fuel, or cold start mixture as well as monitor engine and sensor data in real-time wirelessly from your iPhone or iPad. The E Tuner 4 Setup Wizard simplifies your Pro Flo 4 or EZ Street EFI setup by assisting you with selecting the proper base calibration for your specific application. All you need to know is the engine displacement (CID) and camshaft, and kit specifications, and you're good to go! E-Tuner 4 applies a solid base calibration so you can run the vehicle without having to change any tuning settings. But, if you'd like to make changes, E-Tuner 4 offers a selection of "Advanced Tuning" functions to help dial in your calibration and get the vehicle’s performance exactly where you want it. Whether you'd like to run a bit leaner while cruising for improved mileage, or advance timing for more performance, the Advanced Tuning section is there for you. A diagnostic page for troubleshooting purposes is also available. Once you're up and running, feel free to explore E-Tuner 4’s vivid gauge displays to monitor your engine's performance. Unlike other tuning hand-held combos, you can actually use your phone or tablet as a mini-dashboard once you're done tuning. You can also preview E-Tuner 4 without being connected to an Edelbrock EFI System by enabling "Demo Mode." This will allow you to access the app's main features, and interact with pages like the Setup Wizard, Advanced Tuning, and Gauge Displays to get a feel for how E-Tuner 4 functions. *** Warning! *** E-Tuner 4 is only compatible with the Edelbrock Pro-Flo 4 and EZ Street EFI Systems. It is NOT compatible with V1 E-Street, V2 E-Street, or Pro-Flo 3 EFI systems nor does it work with other Edelbrock Legacy EFI Systems. The E-Tuner 4 app supports all iPhones and iPads running iOS 16 and higher at this time. Please check back later for updates

Screenshots

Tuning4 screens
E4 screens

Verdict

The call

The clearest difference is rating: E at 4.0 against Tuning's 2.4. E also leads on review sentiment (45% vs 21%). Tuning's advantage is update cadence (every 2 months vs every 8 months) and iOS requirement (12.2 vs 16.0). 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

E holds the better App Store score, 4.0 against 2.4. Both are backed by a comparable volume of ratings — 29 and 22 respectively. Written reviews point the same way: 21% of Tuning's written reviews are positive against 45% of E's.

UpkeepUpdate frequency

Tuning ships an update every 2 months, E every 8 months. The most recent releases landed on June 10, 2026 and August 29, 2026 respectively.

Scorecard4 real differences · 6 level
Tuning versus E: the parameters behind the verdict, then further details
ParameterTuningE
PriceFreeFree
Rating2.4 (29 ratings)4.0 (22 ratings) — better
Positive reviews20.8% of reviews45.5% of reviews — better
Number of ratings29 — better22
Update frequencyEvery 2 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.2 — better16.0
Further details — not scored
Size31 MB50 MB
Age rating4+4+
DeveloperSmart Vehicle Engineering GmbHEdelbrock Corp

Customer experience

Tuning

All ratings29 ratings
Positive34.5%
Neutral0.0%
Negative65.5%
Written reviews24 reviews
Positive20.8%
Neutral20.8%
Negative58.3%

E

All ratings17 ratings
Positive70.6%
Neutral23.5%
Negative5.9%
Written reviews11 reviews
Positive45.5%
Neutral36.4%
Negative18.2%

In-app purchases

None

Tuning

No in-app purchases

None

E

No in-app purchases

Questions

Is Tuning free?
Tuning is free to download, with no in-app purchases.
Is E free?
E is free to download, with no in-app purchases.
Which has better reviews, Tuning or E?
E is rated higher. Tuning averages 2.4 out of 5 from 29 ratings, while E averages 4.0 from 22 ratings.
Do Tuning or E have ads?
Neither Tuning nor E shows ads.
Which is updated more often, Tuning or E?
Tuning ships an update every 2 months, and E every 8 months. Most recently, Tuning was updated on June 10, 2026 and E on August 29, 2026.

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