Comparison

aRacer X Tune vs TST LED

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

Head to head
About

aRacer X Tune

This app allows for advanced engine tuning and analysis for specific ECU series. It offers features like fuel and ignition timing adjustments, automatic correction, and traction control. Paid upgrades unlock more powerful functions for a customized experience.

Highlights
  • Fuel and ignition timing adjustment
  • Automatic adjustment functions
  • Traction control system (TCS)
  • Power response adjustment
  • Guided idle speed setting
  • Backfire/Idle lope control
  • New analysis tools
Features
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X Tune APP is aRacer puts the experience in participating of global competitions in the past, providing for new generation ECU for engine adjustment. It is suitable for RC Super X and RC Mini X series ECUs with more user-friendly interface, more convenient to use, and is suitable for holiday track days and daily use. It uses WiFi transmission to complete the adjustment and analysis of the relevant data in a more stable and faster way! In addition, you can also pay to turn on the built-in ECU functions according to the needs of the use, so it is the fun of playing in the engine tuning can be extended infinitely!! X Tune has more powerful built-in functions including (depending on different sales countries and regions, related functions need to be paid to turn on): # More powerful adjustment functions: 1. 20x17 (RPM x TPS%) fuel adjustment 2. 20x9 (RPM x TPS%) ignition timing adjustment (paid to upgrade can enable switching of 3 ignition timing MAP) 3. 20x9 (RPM x TPS%) target air-fuel ratio setting (paid to upgrade can enable switching of 3 target air-fuel ratio MAP) # More powerful AT automatic adjustment function and more accurate & fast actual A/F data feedback through AF2 / AF1: 1. Correct the fuel value% & A/F value in time and record it in the 20x17 fuel MAP 2. The corrected result can be used as a base fuel MAP # New features: 1. TCS tracking functions: # The stock is not equipped with TCS, and it can be easily work in rainy and slippery conditions after starting # The stock is equipped with TCS, can provide 3 levels adjustable 2. 3 levels of fuel correction in stock narrowband O2 sensor Adjustable injection phase 3. Response Button for power response adjustment. After the upgrade, you can switch 3 target air-fuel & ignition timing MAPs in time 4. Guided idle speed setting 5. Guided quick shift triggered pressure setting 6. New style Backfire / Idle lope control 7. New analysis tools # Notes: 1. X Tune is only suitable for safe and closed road track, and don’t allow to be used in public road!! 2. After paying to turn on the ECU functions, no refund can be made, because the function has been turned-on in the ECU! Before paying, you can use the trial function to confirm the applicability! 3. The adjustment function may damage the engine, please find a qualified professional technician to adjust it and it is not suitable for general users! Any adjustment causes engine damage and dangerous accidents, the company cannot provide any compensation! About the details, please refer to: https://www.aracer-speedtek.com/product_d.php?lang=tw&tb=1&id=1770

About

TST LED

Features
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Millions of Colors, At Your Fingertips: - Use an intuitive color wheel to precisely pick any color you desire. - Access multiple popular color presets for instant ambiance changes with a single tap. Dynamic Modes, Vivid Effects: - Built-in dynamic light effects: smooth gradients, energetic strobes, rhythmic music sync, and more. - Customize the speed and brightness of each mode to create a unique visual experience. One-Tap Control, Ultimate Simplicity: - A clean and intuitive interface puts power, mode switching, and on/off control right at your fingertips. - Your favorite lighting scenes are automatically saved for one-tap activation next time.

Screenshots

aRacer X Tune1 screens
TST LED3 screens

Verdict

The call

The clearest difference is update cadence: aRacer X Tune at fortnightly against TST LED's every 6 months. On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

aRacer X Tune ships an update fortnightly, TST LED every 6 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
aRacer X Tune versus TST LED: the parameters behind the verdict, then further details
ParameteraRacer X TuneTST LED
PriceFreeFree
Rating2.9 (17 ratings) — better—
Positive reviews19.0% of reviews—
Number of ratings17 — better—
Update frequencyFortnightly — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size120 MB101 MB
Age rating4+9+
DeveloperARACER SPEEDTEK INC.Foshan Lingchuang Future Information Technology Co., Ltd.

In-app purchases

None

aRacer X Tune

No in-app purchases

None

TST LED

No in-app purchases

Questions

Is aRacer X Tune free?
aRacer X Tune is free to download, with no in-app purchases.
Is TST LED free?
TST LED is free to download, with no in-app purchases.
Do aRacer X Tune or TST LED have ads?
Neither aRacer X Tune nor TST LED shows ads.
Which is updated more often, aRacer X Tune or TST LED?
aRacer X Tune ships an update fortnightly, and TST LED every 6 months. Most recently, aRacer X Tune was updated on October 21, 2026 and TST LED on October 25, 2026.

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