Comparison

Roblox vs Zone 21

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

Head to head
About

Roblox

Explore millions of immersive 3D multiplayer experiences created by a global community. Play games, roleplay, compete, or create your own virtual worlds. Customize avatars and connect with friends across various devices.

Highlights
  • Discover millions of user-created experiences
  • Create and share your own games
  • Customize avatars with clothing and accessories
  • Play with friends across multiple devices
  • Multiplayer battles and role-playing games
  • In-app chat and voice communication (age-verified)
Read full description

ROBLOX – MILLIONS OF GAMES ACROSS EVERY GENRE. PLAY FREE. Roblox is home to every kind of game, for every kind of player. Compete in high-octane racing games, battle it out in hardcore tactical shooters, or put your survival skills to the test in unpredictable environments. Embark on an epic adventure in immersive RPGs, build massive empires in tycoons, or dive into horror, anime, and sports games with friends worldwide. Roblox is constantly evolving, with unique experiences and ambitious, high-fidelity games built by a global community including professional studios, indie teams, and solo creators. There’s always something new to discover every day. Start playing some of the most popular games on Roblox today, including Dress to Impress, RIVALS, Steal a Brainrot, Brookhaven RP, Adopt Me! and more. WHAT YOU CAN DO ON ROBLOX PLAY ONLINE MULTIPLAYER GAMES - Discover deep role-playing games, immersive simulators, action-packed adventures, and more - Explore trending experiences and new games daily - Compete in massive multiplayer battles, run your own digital business, or embark on epic quests - Games may contain optional in-game purchases, including lootboxes and other items CREATE YOUR OWN AVATAR - Customize your avatar with detailed clothing, accessories, and dynamic hairstyles - Discover thousands of user-created 3D avatar items in the Marketplace - Express yourself with unique emotes, and fashion CHAT, COMPETE, AND EXPLORE TOGETHER—ANYTIME, ANYWHERE - Hang out and play with friends in cross-platform multiplayer games on mobile, tablet, PC, console, and VR headsets - Join a Party and jump into competitive or social experiences together - Age-verified users can communicate in real-time via voice chat or text CREATE, PLAY, AND SHARE ON ROBLOX - Design high-fidelity games and virtual spaces using the Roblox Studio engine on Windows or Mac - Publish your experiences and empower yourself as a creator in a massive global community - Dive into immersive 3D multiplayer games and safe, inclusive environments designed for users of all ages - Enjoy endless new content added daily and share your creations with millions of players ELEVATE YOUR EXPERIENCE WITH ROBLOX PLUS - Get up to 20% discounts on in-game items, enjoy fee-free Robux transfers, and receive a distinct profile badge - Host free, unlimited private servers for your friends - Publish, trade, and resell your own custom avatar creations on the Marketplace INDUSTRY-LEADING SAFETY, PRIVACY, AND CIVILITY - Advanced content filtering and age-appropriate moderation - Access age-verified spaces and manage your privacy with Roblox Kids and Select Accounts - Clear community guidelines promoting respectful interactions - Dedicated trust & safety teams working around the clock CREATE YOUR OWN GAMES: https://www.roblox.com/develop SUPPORT: https://en.help.roblox.com/hc/en-us CONTACT: https://corp.roblox.com/contact/ PRIVACY POLICY: https://www.roblox.com/info/privacy PARENT’S GUIDE: https://corp.roblox.com/parents/ TERMS OF USE: https://en.help.roblox.com/hc/en-us/articles/115004647846 PLEASE NOTE: A network connection is required. Roblox works best over Wi-Fi. ※ Information on App Permissions: Roblox requires the following permissions for your seamless use of the Roblox app. [Optional Permissions] Notification: For sending notifications (related to the services, experiences, etc.) Microphone: For in-game voice chat features Camera: For animating your avatar with your movement Contacts: For contact importer features (find other users you may know and make recommendations for friends) * You can use the app regardless of whether or not you consent to optional permissions * Certain app features may not work properly if you refuse optional permissions

About

Zone 21

A fast-paced card game where players aim to keep their card total between 0 and 21 to score points and win real-world rewards and cash prizes. Compete against others globally in timed multiplayer matches.

Highlights
  • Mathematical card game mechanics
  • Stay between 0 and 21
  • Win real cash prizes
  • Multiplayer challenges
  • Timed matches
  • Global leaderboards
Read full description

Welcome to Zone 21 - Fast Math Solitaire a brand new card game where you can win real-world rewards and cash prizes (where available)! Try to stay between 0 and 21. It's not easy and tries to keep the target number close to 21 to earn more points! It's a jackpot when you get exactly 21 and earn great bonus points. SOME KEY FEATURES: • Classic mathematical card game with some amazing twists! • Clear the cards from the table and stay between 0 and 21. • Ready for the challenge? Try to hit the target number 21 and get great bonuses. MULTIPLAYER FEATURES: • Play against friends and solitaire around the world! • Calculate cards as quickly as you can! You have 3 minutes to beat your opponent. • Win and show off your scores on the leaderboard! EARN PRIZES: • Challenge people from around the world • Put your skills to the test and compete to win cash prizes! • Cash rewards for top scorers (where allowed)! Challenge people around the world with Skillz, a competition platform complete with leaderboards, trophies, physical or virtual prizes, and an amazing loyalty program that rewards you for playing! If you have any questions or proposals for the game, we hope you contact us at support@ccbrothers.com If you have any questions about the Skillz system or cash tournaments please contact: support@skillz.com

Screenshots

Roblox4 screens
Zone 214 screens

Verdict

The call

The clearest difference is in-app purchases: Zone 21 at none against Roblox's 16. Zone 21 also leads on review sentiment (83% vs 60%) and rating (4.8 vs 4.5). Roblox's advantage is ads (none vs shown) and update cadence (weekly vs every 3 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. Roblox sells 16 in-app purchases, starting at $4.99 per month. Zone 21 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Zone 21 holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Roblox has 20M ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 60% of Roblox's written reviews are positive against 83% of Zone 21's.

UpkeepUpdate frequency

Roblox ships an update weekly, Zone 21 every 3 months. The most recent releases landed on September 25, 2026 and June 9, 2026 respectively.

Scorecard9 real differences · 2 level
Roblox versus Zone 21: the parameters behind the verdict, then further details
ParameterRobloxZone 21
PriceFreeFree
Rating4.5 (20M ratings)4.8 (23 ratings) — better
Positive reviews60.0% of reviews83.3% of reviews — better
Number of ratings20M — better23
Update frequencyWeekly — betterEvery 3 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
Best chart rank#1 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size224 MB155 MB
Age rating12+17+
DeveloperRoblox CorporationCodeCube Brothers Partnership

Customer experience

Roblox

All ratings20,129,792 ratings
Positive87.6%
Neutral3.5%
Negative8.9%
Written reviews36,493 reviews
Positive60.0%
Neutral7.5%
Negative32.5%

Zone 21

All ratings23 ratings
Positive95.7%
Neutral4.3%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Bugs and requests

Roblox

Reported bugs

3 issues
  • Frequent disconnections and server issues
  • Glitches that delete purchased items
  • Inconsistent chat filtering and tagging

Requested features

5 requests
  • Ability to earn Robux through gameplay
  • Improved search and discovery for games
  • More free avatar customization options
  • Better parental controls and monitoring
  • Faster response to reports of inappropriate content

Zone 21

Not enough reviews yet to summarise bugs or requests.

In-app purchases

16 purchases

Roblox

Subscriptions1
  • Roblox Premium 450$4.991 Month
One-time15
  • 80 ROBUX$0.99
  • Premium 80 Robux$0.99
  • Premium 88 Subscribed$0.99
Show 12 more
  • Premium 160 Robux$1.99
  • Premium 240 Robux$2.99
  • Premium 320 Robux$3.99
  • 400 Robux Premium$4.99
  • 440 Robux Subscribed$4.99
  • Roblox Premium 450 One Month$4.99
  • 800 ROBUX$9.99
  • 800 Robux Premium$9.99
  • 880 Robux Subscribed$9.99
  • Roblox Premium 1000 One Month$9.99
  • 1700 Robux Premium$19.99
  • Roblox Premium 2200 One Month$19.99
None

Zone 21

No in-app purchases

Questions

Is Roblox free?
Roblox is free to download, with in-app purchases available.
Is Zone 21 free?
Zone 21 is free to download, with no in-app purchases.
Which has better reviews, Roblox or Zone 21?
Zone 21 is rated higher. Roblox averages 4.5 out of 5 from 20M ratings, while Zone 21 averages 4.8 from 23 ratings.
Do Roblox or Zone 21 have ads?
Zone 21 shows ads; Roblox does not.
Which is updated more often, Roblox or Zone 21?
Roblox ships an update weekly, and Zone 21 every 3 months. Most recently, Roblox was updated on September 25, 2026 and Zone 21 on June 9, 2026.

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