Comparison

xArm vs LEGO® TECHNIC® CONTROL+

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

Head to head
About

xArm

Control and program a robotic arm using your mobile device via Bluetooth. Save, download, and play custom actions to bring your robotic creations to life. This app offers an engaging way to interact with and explore the capabilities of the robotic arm.

Highlights
  • Bluetooth connectivity
  • Robotic arm control
  • Custom programming
  • Action group management
  • Action download and playback
Features
Read full description

Open the Mobile phone App, and open Bluetooth after connected the X-Arm, you can achieve the interaction between the mobile phone and the X-Arm. You can control the X-Arm as you wish, you can program it by yourself and download the programming to the X-Arm. You can also check the action group that saved on the X-Arm and you can play or download the action too. Believe that this interesting robotic arm can allows you to achieve better ideas and bring more enjoyment .

About

LEGO® TECHNIC® CONTROL+

Enhance your LEGO Technic building experience with realistic driving controls and interactive features. Engage in challenges, unlock achievements, and enjoy authentic sound effects for a new level of play.

Highlights
  • Realistic multi-function control mode
  • One-touch screen control schemes
  • Challenges and achievements
  • Unlockable badges
  • Inspiring videos
  • Authentic sound effects
  • Real-time data
Features
Read full description

"Take your LEGO® Technic™ experience to a new level of awesome realism: • Get a uniquely designed experience for each LEGO Technic CONTROL+ model. • Drive your models with razor-sharp realism with the multi-function control mode. • Try alternative control schemes with the one-touch screen. • Test your handling skills, complete challenges, unlock badges and watch inspiring videos in Challenges & Achievements mode. • Enjoy authentic sound effects, controls, features and functions – plus real-time data. Here are some models you can connect to the CONTROL+ app... • LEGO Technic Batmobile™ Tumbler (42239) • LEGO Technic Lamborghini Revuelto Super Sports Car (42214) • LEGO Technic Porsche GT4 e-Performance Race Car (42176) • LEGO Technic Off-Road Buggy (42124) • LEGO Technic 6x6 Volvo Articulated Hauler (42114) • LEGO Technic App-Controlled Top Gear Rally Car (42109) • LEGO Technic Liebherr R 9800 (42100) • LEGO Technic 4X4 X-Treme Off-Roader (42099) … and the list keeps growing! (Remember that each of these sets is sold separately.) Every model gets its own unique CONTROL+ experience. Whether it’s a rally car, a 4X4, or even a six-wheeler – and whether it has a boom, an arm, or a bucket – you’ll be able to command it with incredible precision and realism. Is your device compatible? Please go to LEGO.com/devicecheck to check if your device is compatible. Ask your parents’ permission before going online. For app support, contact LEGO Consumer Service. For contact details, refer to http://service.LEGO.com/contactus The Dark Knight Trilogy and all related characters and elements are © & ™ DC and Warner Bros. Entertainment Inc. The “Lamborghini” and “Lamborghini Bull and Shield” trademarks, copyrights, designs and models are used under license from Automobili Lamborghini S.p.A, Italy. © 2025 Gameloft. All Rights Reserved. All manufacturers, cars, names, brands and associated imagery are trademarks and/or copyrighted materials of their respective owners. Porsche GT4 e-Performance under license of Porsche AG. BBC logo™ and © BBC 1996. Top Gear logo™ and © BBC 2005. Licensed by BBC Studios. “Liebherr” is a trademark of Liebherr-International AG, used under license by LEGO System A/S. The Volvo trademarks (word and device) are registered trademarks of Volvo Trademark Holding AB and are used pursuant to a license. We will utilize your personal information to manage your account and review anonymized data to provide a safe, contextualized and excellent LEGO experience. You can learn more here: https://www.LEGO.com/privacy-policy - https://www.LEGO.com/legal/notices-and-policies/terms-of-use-for-lego-apps/ Our privacy policy and terms of use for apps are accepted if you download this app. LEGO, the LEGO logo, the Brick and Knob configurations and the Minifigure are trademarks of the LEGO Group. ©2025 The LEGO Group."

Screenshots

xArm1 screens
LEGO® TECHNIC® CONTROL+4 screens

Verdict

The call

The clearest difference is rating: LEGO® TECHNIC® CONTROL+ at 4.8 against xArm's 3.0. LEGO® TECHNIC® CONTROL+ also leads on ratings volume (9.3K vs 3) and review sentiment (69% vs 50%). xArm's advantage is iOS requirement (9.0 vs 15.0). 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

LEGO® TECHNIC® CONTROL+ holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: LEGO® TECHNIC® CONTROL+ has 9.3K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of xArm's written reviews are positive against 69% of LEGO® TECHNIC® CONTROL+'s.

UpkeepUpdate frequency

xArm ships an update every 5 months, LEGO® TECHNIC® CONTROL+ every 2 months. The most recent releases landed on June 24, 2026 and September 26, 2026 respectively.

Scorecard5 real differences · 5 level
xArm versus LEGO® TECHNIC® CONTROL+: the parameters behind the verdict, then further details
ParameterxArmLEGO® TECHNIC® CONTROL+
PriceFreeFree
Rating3.0 (3 ratings)4.8 (9.3K ratings) — better
Positive reviews50.0% of reviews69.0% of reviews — better
Number of ratings39.3K — better
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size4 MB2.0 GB
Age rating4+4+
DeveloperShenzhen Hiwonder Technology Co.,LtdLEGO

Customer experience

xArm

All ratings3 ratings
Positive33.3%
Neutral33.3%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

LEGO® TECHNIC® CONTROL+

All ratings9,253 ratings
Positive94.4%
Neutral2.6%
Negative3.0%
Written reviews526 reviews
Positive69.0%
Neutral12.4%
Negative18.6%

Bugs and requests

xArm

Not enough reviews yet to summarise bugs or requests.

LEGO® TECHNIC® CONTROL+

Reported bugs

5 issues
  • App gets stuck in firmware update loop
  • Incorrect motor activation during calibration
  • Bluetooth connection randomly drops
  • Steering and throttle controls are swapped
  • App crashes when losing a battle race

Requested features

5 requests
  • Custom control profiles for user-built models
  • Support for MFi controllers
  • Ability to edit saved movements
  • Configurable control schemes
  • Improved firmware update process

In-app purchases

None

xArm

No in-app purchases

None

LEGO® TECHNIC® CONTROL+

No in-app purchases

Questions

Is xArm free?
xArm is free to download, with no in-app purchases.
Is LEGO® TECHNIC® CONTROL+ free?
LEGO® TECHNIC® CONTROL+ is free to download, with no in-app purchases.
Which has better reviews, xArm or LEGO® TECHNIC® CONTROL+?
LEGO® TECHNIC® CONTROL+ is rated higher. xArm averages 3.0 out of 5 from 3 ratings, while LEGO® TECHNIC® CONTROL+ averages 4.8 from 9.3K ratings.
Do xArm or LEGO® TECHNIC® CONTROL+ have ads?
Neither xArm nor LEGO® TECHNIC® CONTROL+ shows ads.
Which is updated more often, xArm or LEGO® TECHNIC® CONTROL+?
xArm ships an update every 5 months, and LEGO® TECHNIC® CONTROL+ every 2 months. Most recently, xArm was updated on June 24, 2026 and LEGO® TECHNIC® CONTROL+ on September 26, 2026.

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