Comparison

Voxly vs Grumpy Old Tech Robot Control

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

Head to head
About

Voxly

Explore a magical world of colors with this 3D coloring game. Relax and get creative by coloring numerous pictures by number. Share your creations with a vibrant community and enjoy offline play.

Highlights
  • 3D coloring by number
  • Vast library of pictures
  • Offline play supported
  • Share creations with community
  • User-friendly interface
  • Regularly updated content
Features
Read full description

Explore a magical world full of fun and colors with Voxly Color by Number 3D! It's like a super cool game that helps you relax and be creative. You can color by number lots of cool pictures. Lots of people play this game, and you can show off your amazing creations to everyone in our awesome community! Welcome to Voxly Color By Number: • Loads of Pictures: Jump into a gigantic bunch of cool pictures. Do you adore cats or dogs? Want to color a princess or a watermelon? We've got everything – from animals to magical creatures and tons of other awesome things! • No WiFi or Internet Required: You can enjoy Voxly anytime. It's great for when you're out and about! • Tons of Options: Color all sorts of 3D models – princesses, animals, robots, and much more. There's always something new and exciting to color! • Easy to Use: Our app is super user-friendly. You can start coloring and having fun right away, no stress. • Share with Friends: Show off your coloring skills on Instagram and Facebook. Share your awesome art with everyone! • For Everyone! • No matter if you're new to coloring or a total pro, Voxly is for all ages and skills. • We're always adding new pictures, so your coloring adventure never gets old. • Voxly is totally free to play. Jump in and start coloring! Be Creative - Need Help or Have Ideas? Got something to say? We’d love to hear from you! Contact us at support@byss.mobi for help or suggestions. Download Voxly Now and Start Your Fun Coloring Journey! Our service offers Premium Membership. It's an auto-recurring monthly subscription worth $7.99 with the first 3 days free or Yearly Access worth $29.99. By subscribing, you authorize us to charge subscription costs to iTunes Account. You can cancel any time. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Our privacy policy can be found at: http://byssmobile.com/priv/priv.html Our terms of use can be found at: http://byssmobile.com/priv/terms.html Any unused portion of a free trial period, if offered, will be forfeited when the user purchases.

About

Grumpy Old Tech Robot Control

Read full description

This App is used to control the Grumpy Old Tech Self Balancing Robot. Check out Grumpy's website for instructions on how to build the robot and view his YouTube videos for an explanation of how it all works. If you have any questions leave a comment on how Facebook or Youtube channel. Good luck with your build!!!

Screenshots

Voxly4 screens
Grumpy Old Tech Robot Control1 screens

Verdict

The call

The clearest difference is in-app purchases: Grumpy Old Tech Robot Control at none against Voxly's 11. Grumpy Old Tech Robot Control also leads on ads (none vs shown) and iOS requirement (10.3 vs 12.0). Voxly's advantage is update cadence (every 5 weeks vs every 9 months). On price 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. Voxly sells 11 in-app purchases, starting at $7.99 per month. Grumpy Old Tech Robot Control asks for nothing beyond the download.

UpkeepUpdate frequency

Voxly ships an update every 5 weeks, Grumpy Old Tech Robot Control every 9 months. The most recent releases landed on October 28, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 6 level
Voxly versus Grumpy Old Tech Robot Control: the parameters behind the verdict, then further details
ParameterVoxlyGrumpy Old Tech Robot Control
PriceFreeFree
Rating4.7 (29K ratings) — better—
Positive reviews77.9% of reviews—
Number of ratings29K — better—
Update frequencyEvery 5 weeks — betterEvery 9 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.010.3 — better
Further details — not scored
Size266 MB14 MB
Age rating4+4+
Developerbyss mobileInzant Australia PTY LTD

Bugs and requests

Voxly

Reported bugs

4 issues
  • Numbers showing as complete before all areas are colored
  • Daily pictures already colored when opened
  • App crashing or freezing on launch
  • Inconsistent experience across devices

Requested features

4 requests
  • Ability to rotate and view 3D models from all angles
  • More free pictures and content
  • Reduced ad frequency or ad-free option
  • Lower subscription pricing

Grumpy Old Tech Robot Control

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

Voxly

Subscriptions5
  • Voxly: Monthly Access3 Days trial$7.991 Month
  • 3D color by number Weekly3 Days trial$9.997 Days
  • 3D color by number Monthly$19.991 Month
Show 2 more
  • 3D color by number Yearly$29.991 Year
  • Voxly: One Year Access$29.991 Year
One-time6
  • Super Spin!$0.99
  • Small Pack of Gems$1.99
  • Special Offer$2.99
Show 3 more
  • Medium Pack of Gems$4.99
  • Unlock All Premium Models$4.99
  • Big Pack of Gems$7.99
None

Grumpy Old Tech Robot Control

No in-app purchases

Questions

Is Voxly free?
Voxly is free to download, with in-app purchases available.
Is Grumpy Old Tech Robot Control free?
Grumpy Old Tech Robot Control is free to download, with no in-app purchases.
Do Voxly or Grumpy Old Tech Robot Control have ads?
Voxly shows ads; Grumpy Old Tech Robot Control does not.
Which is updated more often, Voxly or Grumpy Old Tech Robot Control?
Voxly ships an update every 5 weeks, and Grumpy Old Tech Robot Control every 9 months. Most recently, Voxly was updated on October 28, 2026 and Grumpy Old Tech Robot Control on October 26, 2026.

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