# Bayes Theorem Calculator vs Probability Sim

The clearest difference is in-app purchases: Bayes Theorem Calculator at none against Probability Sim's 2. Bayes Theorem Calculator also leads on ads (none vs shown) and update cadence (every 5 days vs every 10 months). On price and device support there is nothing between them.

Both are free to download. Probability Sim sells 2 in-app purchases, starting at $4.99 per month. Bayes Theorem Calculator asks for nothing beyond the download.

Bayes Theorem Calculator ships an update every 5 days, Probability Sim every 10 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Bayes Theorem Calculator | Probability Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/bayes-theorem-calculator/id1619683902/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 10 months |
| Monetization | Free | — |
| Size | 40 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [kota tada](https://appshunter.io/developer/1658942612) |

## What reviewers say

### Bayes Theorem Calculator

[App page](https://appshunter.io/ios/app/bayes-theorem-calculator/id1619683902)

Calculate event probabilities using Bayes' theorem. This utility app provides a straightforward way to apply the theorem for probability calculations.

**Highlights:** Bayes' theorem calculation, Probability of event calculation, Utility tool, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Probability Sim

[App page](https://appshunter.io/ios/app/probability-sim-trillion/id6743378063)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-free for 1 month | $4.99 | per month |
| Ad-free for 1 year | $49.99 | per year |


## Frequently asked questions

### Is Bayes Theorem Calculator free?

Bayes Theorem Calculator is free to download, with no in-app purchases.

### Is Probability Sim free?

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

### Do Bayes Theorem Calculator or Probability Sim have ads?

Probability Sim shows ads; Bayes Theorem Calculator does not.

### Which is updated more often, Bayes Theorem Calculator or Probability Sim?

Bayes Theorem Calculator ships an update every 5 days, and Probability Sim every 10 months. Most recently, Bayes Theorem Calculator was updated on November 3, 2026 and Probability Sim on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*