Comparison

ProbSim vs Goldbach's Conjecture

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

Head to head
About

ProbSim

Simulate probability experiments with various tools like coins, dice, and spinners. Test your predictions against experimental results and tackle challenging probability problems.

Highlights
  • Probability experiment simulation
  • Coin flipping
  • Dice rolling
  • Spinner manipulation
  • Marble drawing from urns
  • Predictive testing
  • Problem-solving challenges
Features
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ProbSim is a probability experiment simulator. You can tag fish, flip coins, roll dice, spin spinners, and draw marbles from urns. Predict the probability of a certain outcome, and see whether or not your prediction is supported by the experimental results. ProbSim also challenges you to solve some tricky and easily misunderstood probability problems involving birthdays, game shows, envelopes, coins, hats, urns, and apparent paradoxes.

About

Goldbach's Conjecture

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Fun and Challenging! Goldbach's Conjecture introduces students to an idea that has baffled mathematicians for centuries. In 1742, a Russian mathematician named Christian Goldbach wrote a letter to Leonhard Euler in which he proposed a conjecture. The conjecture stated that all even numbers greater than two can be expressed as the sum of two primes. This app challenges the player to find two prime numbers to make a target even number. Completing the activity involves using mental math skills. Goldbach Conjecture is designed to be a quick math exercise that teachers can use to provide extra practice in problem solving and an enriching experience for their students. Special sound effects make the game fun to use and the interactive design facilitate problem solving strategies.

Verdict

The call

The clearest difference is price: ProbSim at Free against Goldbach's Conjecture's $0.99. ProbSim also leads on iOS requirement (8.0 vs 12.0). Goldbach's Conjecture's advantage is update cadence (every 8 months vs every 40 months). On ads, 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

ProbSim is free to download; Goldbach's Conjecture costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ProbSim ships an update every 40 months, Goldbach's Conjecture every 8 months. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

Scorecard3 real differences ยท 5 level
ProbSim versus Goldbach's Conjecture: the parameters behind the verdict, then further details
ParameterProbSimGoldbach's Conjecture
PriceFree โ€” better$0.99
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 40 monthsEvery 8 months โ€” better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPadiPad, Mac โ€” better
Requires iOS8.0 โ€” better12.0
Further details โ€” not scored
Size29 MB34 MB
Age rating4+4+
DeveloperThomas BretlVentura Educational Systems

In-app purchases

None

ProbSim

No in-app purchases

None

Goldbach's Conjecture

No in-app purchases

Questions

Is ProbSim free?
ProbSim is free to download, with no in-app purchases.
Is Goldbach's Conjecture free?
Goldbach's Conjecture costs $0.99, with no in-app purchases.
Do ProbSim or Goldbach's Conjecture have ads?
Neither ProbSim nor Goldbach's Conjecture shows ads.
Which is updated more often, ProbSim or Goldbach's Conjecture?
ProbSim ships an update every 40 months, and Goldbach's Conjecture every 8 months. Most recently, ProbSim was updated on October 24, 2026 and Goldbach's Conjecture on October 3, 2026.

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