EZ vs Holley Terminator X
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 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
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | EZ | Holley Terminator X |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (7 ratings) | 4.4 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 5 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 11 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | Performance Electronics | Holley Performance Products |
Customer experience
EZ
Holley Terminator X
In-app purchases
EZ
No in-app purchases
Holley Terminator X
No in-app purchases








