ProbSim vs Goldbach's Conjecture
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ProbSim
Simulate probability experiments with various tools like coins, dice, and spinners. Test your predictions against experimental results and tackle challenging probability problems.
- Probability experiment simulation
- Coin flipping
- Dice rolling
- Spinner manipulation
- Marble drawing from urns
- Predictive testing
- Problem-solving challenges
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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.
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 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
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.
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.
| Parameter | ProbSim | Goldbach's Conjecture |
|---|---|---|
| Price | Free โ better | $0.99 |
| Positive reviews | 0.0% of reviews | โ |
| Update frequency | Every 40 months | Every 8 months โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | โ |
| Devices | iPad | iPad, Mac โ better |
| Requires iOS | 8.0 โ better | 12.0 |
| Further details โ not scored | ||
| Size | 29 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Bretl | Ventura Educational Systems |
In-app purchases
ProbSim
No in-app purchases
Goldbach's Conjecture
No in-app purchases
Questions
Is ProbSim free?
Is Goldbach's Conjecture free?
Do ProbSim or Goldbach's Conjecture have ads?
Which is updated more often, ProbSim or Goldbach's Conjecture?
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