Comparison

LEGO® TECHNIC® CONTROL+ vs HAPPY BUILD

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

Head to head
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."

About

HAPPY BUILD

Control Xinyu Bluetooth toy cars with your mobile device. Offers multiple control methods like buttons, gyroscope, voice commands, and programming for varied play experiences.

Highlights
  • Bluetooth connectivity
  • Multiple control modes
  • Gyroscope control
  • Voice command control
  • Action programming
Features
Read full description

This is the remote control App software for Xinyu Bluetooth products. Connect with the cool bluetooth toy cars of Xinyu various series through data bluetooth and audio bluetooth. It contains a variety of different styles of control methods, including: conventional button remote control, gyroscope re-sensing remote control, line drawing remote control, voice command control, and action programming control modes, allowing you to experience different fun!

Screenshots

LEGO® TECHNIC® CONTROL+4 screens
HAPPY BUILD4 screens

Verdict

The call

The clearest difference is review sentiment: LEGO® TECHNIC® CONTROL+ at 69% against HAPPY BUILD's 17%. LEGO® TECHNIC® CONTROL+ also leads on rating (4.7 vs 3.0) and ratings volume (9.3K vs 7). HAPPY BUILD's advantage is update cadence (every 4 weeks vs every 2 months) and 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, 4.7 against 3.0. That said, the two scores are not equally well evidenced: LEGO® TECHNIC® CONTROL+ has 9.3K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 69% of LEGO® TECHNIC® CONTROL+'s written reviews are positive against 17% of HAPPY BUILD's.

UpkeepUpdate frequency

LEGO® TECHNIC® CONTROL+ ships an update every 2 months, HAPPY BUILD every 4 weeks. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
LEGO® TECHNIC® CONTROL+ versus HAPPY BUILD: the parameters behind the verdict, then further details
ParameterLEGO® TECHNIC® CONTROL+HAPPY BUILD
PriceFreeFree
Rating4.7 (9.3K ratings) — better3.0 (7 ratings)
Positive reviews69.2% of reviews — better16.7% of reviews
Number of ratings9.3K — better7
Update frequencyEvery 2 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.09.0 — better
Further details — not scored
Size2.0 GB375 MB
Age rating4+4+
DeveloperLEGO System A/S睦彬 王

Customer experience

LEGO® TECHNIC® CONTROL+

All ratings9,297 ratings
Positive94.4%
Neutral2.6%
Negative3.0%
Written reviews529 reviews
Positive69.2%
Neutral12.3%
Negative18.5%

HAPPY BUILD

All ratings7 ratings
Positive42.9%
Neutral14.3%
Negative42.9%
Written reviews6 reviews
Positive16.7%
Neutral16.7%
Negative66.7%

Bugs and 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

HAPPY BUILD

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

LEGO® TECHNIC® CONTROL+

No in-app purchases

None

HAPPY BUILD

No in-app purchases

Questions

Is LEGO® TECHNIC® CONTROL+ free?
LEGO® TECHNIC® CONTROL+ is free to download, with no in-app purchases.
Is HAPPY BUILD free?
HAPPY BUILD is free to download, with no in-app purchases.
Which has better reviews, LEGO® TECHNIC® CONTROL+ or HAPPY BUILD?
LEGO® TECHNIC® CONTROL+ is rated higher. LEGO® TECHNIC® CONTROL+ averages 4.7 out of 5 from 9.3K ratings, while HAPPY BUILD averages 3.0 from 7 ratings.
Do LEGO® TECHNIC® CONTROL+ or HAPPY BUILD have ads?
Neither LEGO® TECHNIC® CONTROL+ nor HAPPY BUILD shows ads.
Which is updated more often, LEGO® TECHNIC® CONTROL+ or HAPPY BUILD?
LEGO® TECHNIC® CONTROL+ ships an update every 2 months, and HAPPY BUILD every 4 weeks. Most recently, LEGO® TECHNIC® CONTROL+ was updated on October 15, 2026 and HAPPY BUILD on October 1, 2026.

Other comparisons