Comparison

123\Tune+ vs E

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

Head to head
About

123\Tune+

Control your classic car's ignition wirelessly via Bluetooth. Adjust advance and vacuum curves, monitor real-time engine data, and utilize features like a PIN-code immobilizer and rev limiter. Compatible with a wide range of classic vehicles.

Highlights
  • Wireless ignition curve adjustment
  • Real-time engine data monitoring
  • PIN-code immobilizer
  • Soft rev limiter
  • Tune mode for timing tests
  • MAP/boost sensor support
Features
Read full description

Take full control of your classic car’s ignition with the 123\Tune+ app and distributor. Wirelessly adjust and upload custom advance and vacuum curves via Bluetooth. Monitor real-time engine data including RPM, battery voltage, distributor temperature, MAP pressure, ignition advance, and GPS speed. The 123\Tune+ offers advanced features like a PIN-code immobilizer for theft protection, a soft rev limiter, and a unique "Tune" mode for testing ignition timing impact on acceleration between two RPM points. Compatible with both 6V and 12V systems, CW and CCW rotation, and equipped with a MAP/boost sensor. Works with a wide range of classic vehicles — from Alfa Romeo and Jaguar to Volkswagen and Volvo. Visit 123ignition.com for supported models and more details.

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

123\Tune+4 screens
E4 screens

Verdict

The call

The clearest difference is rating: 123\Tune+ at 4.5 against E's 3.9. 123\Tune+ also leads on update cadence (every 3 weeks vs every 4 months) and ratings volume (242 vs 24). On price, ads, in-app purchases and monetization model 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

123\Tune+ holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: 123\Tune+ has 242 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 58% of 123\Tune+'s written reviews are positive against 46% of E's.

UpkeepUpdate frequency

123\Tune+ ships an update every 3 weeks, E every 4 months. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
123\Tune+ versus E: the parameters behind the verdict, then further details
Parameter123\Tune+E
PriceFreeFree
Rating4.5 (242 ratings) — better3.9 (24 ratings)
Positive reviews58.3% of reviews — better46.2% of reviews
Number of ratings242 — better24
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.016.0
Further details — not scored
Size209 MB51 MB
Age rating4+4+
DeveloperAlbertronic B.V.Edelbrock Corp

Customer experience

123\Tune+

All ratings242 ratings
Positive87.6%
Neutral2.9%
Negative9.5%
Written reviews24 reviews
Positive58.3%
Neutral8.3%
Negative33.3%

E

All ratings24 ratings
Positive66.7%
Neutral20.8%
Negative12.5%
Written reviews13 reviews
Positive46.2%
Neutral30.8%
Negative23.1%

In-app purchases

None

123\Tune+

No in-app purchases

None

E

No in-app purchases

Questions

Is 123\Tune+ free?
123\Tune+ 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, 123\Tune+ or E?
123\Tune+ is rated higher. 123\Tune+ averages 4.5 out of 5 from 242 ratings, while E averages 3.9 from 24 ratings.
Do 123\Tune+ or E have ads?
Neither 123\Tune+ nor E shows ads.
Which is updated more often, 123\Tune+ or E?
123\Tune+ ships an update every 3 weeks, and E every 4 months. Most recently, 123\Tune+ was updated on October 12, 2026 and E on October 14, 2026.

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