# Probability vs Lottery Probability Calculator

The clearest difference is in-app purchases: Lottery Probability Calculator at none against Probability's 1. Probability's advantage is ads (none vs shown) and update cadence (every 10 days vs every 10 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Probability sells 1 one-off in-app purchase. Lottery Probability Calculator asks for nothing beyond the download.

Probability ships an update every 10 days, Lottery Probability Calculator every 10 months. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Probability | Lottery Probability Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 10 months |
| Monetization | Free with in-app purchases | — |
| Size | 166 MB | 17 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Man Hung Sun](https://appshunter.io/developer/1471605573) | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) |

## What reviewers say

### Probability

[App page](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969)

Enhance your decision-making skills by learning to assess probabilities with this app. It offers formulas for problem-solving, note-taking capabilities, and interactive tools like dice and coin tosses for practical learning.

**Highlights:** Probability assessment, Decision-making improvement, Problem-solving formulas, Personalized notes, Dice and coin toss simulations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $0.99 | one-time |


### Lottery Probability Calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Probability free?

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

### Is Lottery Probability Calculator free?

Lottery Probability Calculator is free to download, with no in-app purchases.

### Do Probability or Lottery Probability Calculator have ads?

Lottery Probability Calculator shows ads; Probability does not.

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

Probability ships an update every 10 days, and Lottery Probability Calculator every 10 months. Most recently, Probability was updated on October 23, 2026 and Lottery Probability Calculator on October 27, 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.*