Comparison

Probability Sim vs Randomness Generator

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

Head to head

Probability Sim

Odds Calculator for 1T Trials

Fast and secure randomness

Free

🔧 Utilities

No ratingsView app →

About

Probability Sim

Features

Read full description

Probability Simulator 1T Trials is a powerful simulation app that lets you test probabilities to the extreme. Run up to 1 trillion trials and calculate probabilities as low as 1 in a trillion. Choose from decimal, percentage, or fraction notation. Simultaneously run multiple probability events for complex calculations. Perfect for statistics enthusiasts, mathematicians, and anyone interested in random trials. Sharpen your probability intuition and gain real insights from large-scale simulations.

About

Randomness Generator

Features

Read full description

Fast and secure access to random values. - Cryptography-grade randomness, 100% local - Available on all your devices with iCloud clipboard - No history saved anywhere

Screenshots

Probability Sim2 screens

Randomness Generator1 screens

Verdict

The call

The clearest difference is in-app purchases: Randomness Generator at none against Probability Sim's 2. Randomness Generator also leads on update cadence (every 2 days vs every 10 months). On price, ads, device support and iOS requirement 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. Probability Sim sells 2 in-app purchases, starting at $4.99 per month. Randomness Generator asks for nothing beyond the download.

UpkeepUpdate frequency

Probability Sim ships an update every 10 months, Randomness Generator every 2 days. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

Scorecard2 real differences · 4 level

Probability Sim versus Randomness Generator: the parameters behind the verdict, then further details
Parameter	Probability Sim	Randomness Generator
Price	Free	Free
Update frequency	Every 10 months	Every 2 days — better
Ads	Yes	Yes
In-app purchases	Yes	No — better
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	15.0
Further details — not scored
Size	29 MB	7 MB
Age rating	4+	4+
Developer	kota tada	Owned by Me

In-app purchases

2 purchases

Probability Sim

Subscriptions2

Ad-free for 1 month7 Days trial$4.991 Month
Ad-free for 1 year14 Days trial$49.991 Year

None

Randomness Generator

No in-app purchases

Questions

Is Probability Sim free?

Probability Sim is free to download, with in-app purchases available.

Is Randomness Generator free?

Randomness Generator is free to download, with no in-app purchases.

Do Probability Sim or Randomness Generator have ads?

Both Probability Sim and Randomness Generator show ads.

Which is updated more often, Probability Sim or Randomness Generator?

Probability Sim ships an update every 10 months, and Randomness Generator every 2 days. Most recently, Probability Sim was updated on November 12, 2026 and Randomness Generator on November 13, 2026.