Comparison

Probability(Math Drills) vs Galton Board App

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

Head to head
About

Probability(Math Drills)

Features
Read full description

You can learn Probability offline. Since the question generation and the correctness judgment of the answer are automatically performed, you can work on the drill learning as many times as you like. You can also see tips and answers. Score high in Challenge Mode to improve your rank!!

About

Galton Board App

Explore probability and mathematical concepts through an interactive simulation. This app uses your device's gyroscope to create a dynamic Galton Board, illustrating binomial and normal distributions. It also offers a stock market simulation to demonstrate market return probabilities.

Highlights
  • Interactive Galton Board simulation
  • Binomial and normal distribution demonstration
  • Stock market data simulation
  • Detailed mathematical concept explanations
  • Pause and slow-motion controls
  • Historical market return bead simulation
Features
Read full description

Unlock the power of probabilities and explore the beauty of mathematics in motion with the Galton Board App. This innovative application transforms your mobile device into a dynamic, interactive probability demonstrator that brings centuries-old mathematical concepts to life. The app utilizes your iPhone's and iPad's gyroscope capabilities, creating an immersive experience where the beads appear as if they are rolling around inside your device. The Galton Board was invented by Sir Francis Galton in 1873 to illustrate the binomial distribution. Through our app, we've recreated this educational tool to demonstrate how, with a large number of beads and rows of hexagons, it approximates the normal distribution - a concept known as the Central Limit Theorem. Key Features: • An interactive Galton Board that displays the principles of probabilities and the binomial distribution. • Detailed explanations of related mathematical concepts, including probability theories, independent identically distributed (IID) random variables, regression to the mean, the law of large numbers, the random walk, the Gambler's Fallacy, and more. • A "Stock Market Data" version, simulating the probabilities of a range of historical monthly market returns, and demonstrating their correlation with the binomial distribution. • The 'Historical Monthly Return Beads' featured with the Stock Market Data, where beads fall through the board based on monthly historical returns for a choice of 20 index portfolios. • Pause or slow-motion options to study the bead movement and distribution patterns in detail. The Galton Board App is ideal for statistics, math, and stock market enthusiasts. It is not just an app, it's an immersive, hands-on approach to understanding probabilities, the binomial distribution, and the stock market behavior. Presented by Index Fund Advisors, this app is your go-to educational tool. Download now and embark on a fascinating journey into the world of probabilities and the "law of unreason" as referred to by Sir Francis Galton himself!

Screenshots

Probability(Math Drills)4 screens
Galton Board App4 screens

Verdict

The call

The clearest difference is in-app purchases: Probability(Math Drills) at none against Galton Board App's 1. Probability(Math Drills) also leads on iOS requirement (12.0 vs 15.0). Galton Board App's advantage is device support (4 vs 2). On price, update cadence and ads 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. Galton Board App sells 1 one-off in-app purchase. Probability(Math Drills) asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 4, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
Probability(Math Drills) versus Galton Board App: the parameters behind the verdict, then further details
ParameterProbability(Math Drills)Galton Board App
PriceFreeFree
Rating—5.0 (116 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—116 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.0 — better15.0
Further details — not scored
Size28 MB67 MB
Age rating4+4+
Developer郷 田村Index Fund Advisors, Inc

Bugs and requests

Probability(Math Drills)

Not enough reviews yet to summarise bugs or requests.

Galton Board App

Requested features

1 request
  • Bring back the physical product (commented by EJ's App, likely not a feature request for the app itself but a general wish)

In-app purchases

None

Probability(Math Drills)

No in-app purchases

1 purchases

Galton Board App

One-time1
  • Stock Market DataFree

Questions

Is Probability(Math Drills) free?
Probability(Math Drills) is free to download, with no in-app purchases.
Is Galton Board App free?
Galton Board App is free to download, with in-app purchases available.
Do Probability(Math Drills) or Galton Board App have ads?
Neither Probability(Math Drills) nor Galton Board App shows ads.
Which is updated more often, Probability(Math Drills) or Galton Board App?
Probability(Math Drills) ships an update every 3 weeks, and Galton Board App every 3 weeks. Most recently, Probability(Math Drills) was updated on August 4, 2026 and Galton Board App on September 19, 2026.

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