# Lottery Probability Calculator vs Probability Sim

The clearest difference is in-app purchases: Lottery Probability Calculator at none against Probability Sim's 2. Lottery Probability Calculator also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads 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. Lottery Probability Calculator asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 10 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Lottery Probability Calculator | Probability Sim |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | Every 10 months |
| Size | 17 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [kota tada](https://appshunter.io/developer/1658942612) |

## What reviewers say

### Lottery Probability Calculator

[App page](https://appshunter.io/ios/app/lottery-probability-calculator/id6448104037)

**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 Lottery Probability Calculator free?

Lottery Probability 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 Lottery Probability Calculator or Probability Sim have ads?

Both Lottery Probability Calculator and Probability Sim show ads.

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

Lottery Probability Calculator ships an update every 10 months, and Probability Sim every 10 months. Most recently, Lottery Probability Calculator was updated on October 27, 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.*