Comparison

Addition Skill Builders vs Rival Edge

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

Head to head
About

Addition Skill Builders

Features
Read full description

Improve your addition skills with Addition Skill Builders! Powered by natural handwriting input, this app transforms traditional practice into an engaging experience. It offers two modes: Math Trainer – a simple whiteboard where you can write your answers at your own pace. Math mini games – dive into 5 fun and engaging mini games with adaptive difficulty that challenge and motivate you at every level. With Addition Skill Builders you can practice and improve the following math skills: - Adding 1 - Adding 2 - Adding 3 - Adding 4 - Adding 5 - Adding 6 - Adding 7 - Adding 8 - Adding 9 - Adding 10

About

Rival Edge

Master strategic decision-making with real-life scenarios and Nobel Prize-winning game theory concepts. Learn practical rules for everyday dilemmas, track your progress, and gain an edge in negotiations and relationships.

Highlights
  • Interactive real-life scenarios
  • 12 essential game theory concepts
  • 20 practical daily rules
  • Progress tracking with XP and ranks
  • Payoff matrices for decision math
  • Offline functionality
  • Supports 6 languages
Features
Read full description

Learn game theory through real-life scenarios. Rival Edge teaches you the science of strategic decision-making. INTERACTIVE SCENARIOS Face real dilemmas: salary negotiations, splitting restaurant bills, trust in relationships, group projects, and more. Every choice has consequences calculated through actual game theory models. 12 ESSENTIAL THEORIES Nash Equilibrium — why people get stuck in suboptimal situations Tit-for-Tat — the winning strategy in repeated interactions Prisoner's Dilemma — when cooperation beats selfishness Tragedy of the Commons — why shared resources disappear Ultimatum Game — the psychology of fairness And 7 more Nobel Prize-winning concepts 20 DAILY RULES Practical principles for everyday life: "Always name your number first", "Mirror behavior, not words", "Forgive fast, but remember". Each rule is backed by research. FEATURES 10+ scenarios with multiple outcomes Payoff matrices showing the math behind decisions Progress tracking with XP and ranks Beautiful dark interface 6 languages: English, Russian, French, German, Spanish, Italian No ads, no tracking, fully offline Whether you're negotiating a raise, dealing with a difficult neighbor, or deciding whether to trust someone — game theory gives you the edge.

Screenshots

Addition Skill Builders4 screens
Rival Edge4 screens

Verdict

The call

The clearest difference is update cadence: Rival Edge at every 6 months against Addition Skill Builders's every 28 months. Addition Skill Builders's advantage is price ($2.99 vs $3.99) and iOS requirement (12.0 vs 26.0). On ads, in-app purchases 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

Addition Skill Builders costs $2.99 and Rival Edge $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Addition Skill Builders ships an update every 28 months, Rival Edge every 6 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 6 level
Addition Skill Builders versus Rival Edge: the parameters behind the verdict, then further details
ParameterAddition Skill BuildersRival Edge
Price$2.99 — better$3.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 28 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better26.0
Further details — not scored
Size19 MB7 MB
Age rating4+4+
DeveloperSergey MaluginVladimir Rodzaevskiy

In-app purchases

None

Addition Skill Builders

No in-app purchases

None

Rival Edge

No in-app purchases

Questions

Is Addition Skill Builders free?
Addition Skill Builders costs $2.99, with no in-app purchases.
Is Rival Edge free?
Rival Edge costs $3.99, with no in-app purchases.
Do Addition Skill Builders or Rival Edge have ads?
Neither Addition Skill Builders nor Rival Edge shows ads.
Which is updated more often, Addition Skill Builders or Rival Edge?
Addition Skill Builders ships an update every 28 months, and Rival Edge every 6 months. Most recently, Addition Skill Builders was updated on October 10, 2026 and Rival Edge on October 4, 2026.

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