Comparison

Rubicon vs SumFun Kids

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

Head to head
About

Rubicon

Features
Read full description

Master math through exciting mini-games, earn XP, and unlock fun in-game rewards with Rubicon โ€” a fast, fun, and gamified learning experience! Solve brain-teasing math puzzles, collect XP (Learning Points), and enjoy new challenges every week. Unlock gems and customize your in-game avatar as you learn. Whether you're practicing your skills or exploring new math adventures, Rubicon makes learning exciting and rewarding โ€” all in a safe, child-friendly environment. Features: - Quick math games that help develop real skills - Customize your avatar with unlockable outfits - Earn XP (Learning Points) to see your personal growth - Climb weekly leaderboards (with no personal information shared) - Collect gems to unlock visual upgrades Note: Rubicon is not affiliated with Roblox or any other platform. All virtual rewards are earned through gameplay and can only be used within the app to unlock educational or entertainment features. No real-money rewards or exchanges are offered.

About

SumFun Kids

Features
Read full description

Make math exciting! SumFun turns everyday practice into a space-themed adventure that kids actually want to play. Practice all four operations: addition, subtraction, multiplication, and division. Choose which operations to focus on and adjust the number ranges to match your child's level. Two answer modes - pick from four choices for quick play, or type answers on the numpad for an extra challenge. Stay motivated with streaks - build answer streaks and unlock milestone celebrations at 5, 10, 15, and 20 in a row. Confetti flies when you score 80% or higher! Track your progress - see your accuracy, best streak, and a scoreboard of your top results. Multiple player profiles - siblings or classmates can each have their own settings and high scores on the same device. Customizable rounds - set 5 to 50 questions per round to fit any schedule, from a quick warm-up to a full practice session.

Screenshots

Rubicon3 screens
SumFun Kids4 screens

Verdict

The call

The clearest difference is ads: SumFun Kids at none against Rubicon's shown. Rubicon's advantage is update cadence (every 2 days vs weekly) and iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Rubicon sells 7 one-off in-app purchases and SumFun Kids sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Rubicon ships an update every 2 days, SumFun Kids weekly. The most recent releases landed on September 9, 2026 and August 23, 2026 respectively.

Scorecard3 real differences ยท 3 level
Rubicon versus SumFun Kids: the parameters behind the verdict, then further details
ParameterRubiconSumFun Kids
PriceFreeFree
Update frequencyEvery 2 days โ€” betterWeekly
AdsYesNo โ€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.0 โ€” better17.0
Further details โ€” not scored
Size698 MB4 MB
Age rating4+4+
DeveloperOneTwoPlay B.V.VNIL AB

In-app purchases

7 purchases

Rubicon

One-time7
  • 500 Gems$4.99
  • Battle Pass Premium$4.99
  • 1000 Gems$9.99
Show 4 more
  • 1500 Gems$14.99
  • 2000 Gems$19.99
  • 2500 Gems$24.99
  • 3000 Gems$29.99
1 purchases

SumFun Kids

One-time1
  • Premium Avatars$1.99

Questions

Is Rubicon free?
Rubicon is free to download, with in-app purchases available.
Is SumFun Kids free?
SumFun Kids is free to download, with in-app purchases available.
Do Rubicon or SumFun Kids have ads?
Rubicon shows ads; SumFun Kids does not.
Which is updated more often, Rubicon or SumFun Kids?
Rubicon ships an update every 2 days, and SumFun Kids weekly. Most recently, Rubicon was updated on September 9, 2026 and SumFun Kids on August 23, 2026.

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