Comparison

EZ vs Holley Terminator X

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

Head to head
About

EZ

Control your vehicle's transmission settings wirelessly from your iOS device. Adjust shift points, firmness, and aggressiveness with intuitive data logging and self-diagnostics. Includes an anti-theft feature for remote vehicle disabling.

Highlights
  • Wireless transmission control via Bluetooth
  • Adjust shift points, firmness, and aggressiveness
  • Data logging and self-diagnostics
  • Remote anti-theft vehicle disabling
  • No laptop or software required
Features
Read full description

TCI® EZ-TCU™ Transmission Controller users can now tune their transmission via iOS devices. A wireless module enables Bluetooth communication between the EZ-TCU™ and an iOS app, enabling the user to control shift points, firmness and aggressiveness. Data logging and self-diagnostics make it possible to optimize tuning intuitively – without the need for software, a hand-held unit or cabling. There is also an anti-theft feature that allows for remote disabling of the vehicle. Features & Benefits: · Easy transmission control from your phone or tablet; no laptop or software needed · Maximum electronic control over the shift points, shift firmness and shift aggressiveness · Data logging and self-diagnostics for optimal tuning · Anti-theft feature for disabling vehicle through app · Compatible with 4L60E, 4L65E, 4L70E, 4L80E, 4L85E and TCI® 4x & 6x transmissions

About

Holley Terminator X

Unlock advanced vehicle tuning control with this app. Fine-tune over 250 engine parameters for maximum performance using a mobile-friendly interface. Monitor vital engine data, create custom tunes, and share tuning files effortlessly.

Highlights
  • 250+ customizable engine parameters
  • Real-time engine data monitoring
  • Intuitive setup wizard for base tunes
  • Create, manage, and share tuning files
  • Record and share datalogs
  • Step-by-step TPS setup
Read full description

UNLOCK THE NEXT LEVEL OF TUNING CONTROL FOR YOUR VEHICLE with the Holley Terminator X EFI mobile app — the ultimate companion for performance tuning right from your iPhone or iPad. Take control of your engine’s performance with 250+ CUSTOMIZABLE PARAMETERS FOR PRECISE TUNING. Designed for enthusiasts and professionals alike, the Holley Terminator X EFI app lets you FINE TUNE ENGINE PARAMETERS FOR MAXIMUM PERFORMANCE — all from the convenience of your mobile device. Key Features: · Six pre-defined real-time monitoring screens for instant access to vital engine data · Intuitive setup wizard helps you easily create a powerful base tune in minutes · View real-time gauges on screen at a glance – no laptop required · Effortlessly create, manage, and share your tuning files with others · Record and share datalogs to review your performance anytime, anywhere · Simple, step-by-step Throttle Position Sensor (TPS) setup for accurate control Built specifically for use with Holley’s Terminator X EFI systems, this app gives you advanced tuning capabilities in a streamlined, mobile-friendly interface. Perfect for racers, tuners, and performance enthusiasts — take your tuning to the next level and keep your engine dialed in with Holley. App Requires the Holley Bluetooth Module to connect to the Terminator X ECU.

Screenshots

EZ3 screens
Holley Terminator X4 screens

Verdict

The call

The clearest difference is review sentiment: Holley Terminator X at 100% against EZ's 0%. Holley Terminator X also leads on rating (4.4 vs 3.9). EZ's advantage is update cadence (monthly vs every 2 months) and iOS requirement (11.0 vs 15.0). 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

Holley Terminator X holds the better App Store score, 4.4 against 3.9. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews point the same way: 0% of EZ's written reviews are positive against 100% of Holley Terminator X's.

UpkeepUpdate frequency

EZ ships an update monthly, Holley Terminator X every 2 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
EZ versus Holley Terminator X: the parameters behind the verdict, then further details
ParameterEZHolley Terminator X
PriceFreeFree
Rating3.9 (7 ratings)4.4 (5 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings7 — better5
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better15.0
Further details — not scored
Size11 MB227 MB
Age rating4+4+
DeveloperPerformance ElectronicsHolley Performance Products

Customer experience

EZ

All ratings7 ratings
Positive57.1%
Neutral28.6%
Negative14.3%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Holley Terminator X

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EZ

No in-app purchases

None

Holley Terminator X

No in-app purchases

Questions

Is EZ free?
EZ is free to download, with no in-app purchases.
Is Holley Terminator X free?
Holley Terminator X is free to download, with no in-app purchases.
Which has better reviews, EZ or Holley Terminator X?
Holley Terminator X is rated higher. EZ averages 3.9 out of 5 from 7 ratings, while Holley Terminator X averages 4.4 from 5 ratings.
Do EZ or Holley Terminator X have ads?
Neither EZ nor Holley Terminator X shows ads.
Which is updated more often, EZ or Holley Terminator X?
EZ ships an update monthly, and Holley Terminator X every 2 months. Most recently, EZ was updated on November 2, 2026 and Holley Terminator X on October 30, 2026.

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