Comparison

Turtle Universe vs GROB

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

Head to head
About

Turtle Universe

Explore and learn about scientific phenomena through interactive microworlds. Create your own simulations using text or blocks, and engage with a global community of young learners. Discover over 100 scientific models and create computational art and games.

Highlights
  • Explore 100+ scientific models
  • Create custom microworlds
  • Code with text or blocks
  • Investigate phenomena
  • Engage in global discussions
  • Create computational art and games
Features
Read full description

Dive into the mesmerizing world of Turtle Universe, where you can explore and learn about various social and scientific phenomena through captivating microworlds. Unleash your creativity by coding your own microworlds with text or blocks, and join lively discussions with young learners across the globe! 1) Discover over 100 intriguing scientific models from diverse fields – with even more on the way! 2) Investigate phenomena such as traffic jams, predator-prey interactions, and the blooming of flowers. 3) Immerse yourself in enthralling storylines within the microworlds. 4) Create and play with stunning computational art and addictive games just for fun! Inspired by NetLogo, the leading multi-agent programmable modeling environment, Turtle Universe brings the limitless power of computational modeling to smartphones and tablets of young students and educators like you! Experience genuine scientific modeling shared by countless researchers and students worldwide. Turtle Universe supports most NetLogo, NetLogo Web, and NetTango models right from the start. From the creators of Physics Lab, a physics experiment simulation app loved by over 3 million learners and teachers. =========================== Term of Use: https://static.turtlesim.com/products/Term-Of-Use.txt Privacy Policy: https://static.turtlesim.com/products/Privacy-Policy.txt =========================== Copyright 2021 John Chen & Uri Wilensky. All rights reserved. Turtle Universe is authored by John Chen & Uri Wilensky and maintained by CCL at Northwestern University. If you mention the software in a publication, please include the citation below: * Chen, J. & Wilensky, U. (2021). Turtle Universe. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL.

About

GROB

Features
Read full description

GROB – Your Smart Robot Companion, Endless Fun! Free Download, Easy Connection
 GROB is a powerful free app that connects seamlessly with your robot via Bluetooth®, offering multiple interactive modes! Whether it’s remote control, motion sensing, coding, or dancing, GROB makes robot interaction creative and fun. Multiple Control Modes, Master Your Robot • Remote Control: Use virtual buttons to command your robot in real-time, performing precise movements! • Motion Sensing: Activate your phone/tablet camera to track your body movements—your robot will mimic you like a "mirror double"! • Coding Mode: Customize robot actions with block-based programming—just drag and drop commands to create unique behaviors! • Dance Mode: Enjoy built-in music and cool dance moves—press play, and watch your robot groove to the beat! Easy to Use, Fun for All Ages
Whether you're a tech enthusiast, educator, or just love exploring new gadgets, GROB delivers intuitive controls and endless entertainment. Bring your robot to life like never before! Download GROB Now & Unlock Your Robot’s Potential!
Get it for free on the App Store and start your smart robot adventure today!

Screenshots

Turtle Universe4 screens
GROB3 screens

Verdict

The call

Turtle Universe and GROB are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Turtle Universe ships an update every 6 weeks, GROB every 2 months. The most recent releases landed on July 29, 2026 and September 9, 2026 respectively.

ScorecardNo meaningful differences
Turtle Universe versus GROB: the parameters behind the verdict, then further details
ParameterTurtle UniverseGROB
PriceFreeFree
Rating4.6 (45 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings45 — better—
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size120 MB320 MB
Age rating4+4+
DeveloperTurtle Sim LLCShantou Jinbida Technology Co., Ltd

In-app purchases

None

Turtle Universe

No in-app purchases

None

GROB

No in-app purchases

Questions

Is Turtle Universe free?
Turtle Universe is free to download, with no in-app purchases.
Is GROB free?
GROB is free to download, with no in-app purchases.
Do Turtle Universe or GROB have ads?
Neither Turtle Universe nor GROB shows ads.
Which is updated more often, Turtle Universe or GROB?
Turtle Universe ships an update every 6 weeks, and GROB every 2 months. Most recently, Turtle Universe was updated on July 29, 2026 and GROB on September 9, 2026.

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