# Discrete Probability vs AI Notebook

The clearest difference is rating: Discrete Probability at 5.0 against AI Notebook's 1.0. Discrete Probability also leads on in-app purchases (none vs 6) and update cadence (every 4 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. AI Notebook sells 6 in-app purchases, starting at $3.99 per 7 days. Discrete Probability asks for nothing beyond the download.

Discrete Probability holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Discrete Probability ships an update every 4 days, AI Notebook every 3 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Discrete Probability | AI Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/discrete-probability/id6752967885/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/ai-notebook-ai-note-taker/id6778546092/reviews) |
| Number of ratings | **3** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 8 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuri Morozov](https://appshunter.io/developer/1582368813) | [Hassan Ahmad Babar](https://appshunter.io/developer/1895284920) |

## What reviewers say

### Discrete Probability

[App page](https://appshunter.io/ios/app/discrete-probability/id6752967885)

This app provides a comprehensive tool for learning and calculating discrete probability distributions. It includes formulas with derivations, visual tools like histograms, and descriptions of optimized computation methods. It covers general concepts and several specific distributions.

**Highlights:** User-friendly calculator, Formulas with derivations, Exportable formulas (image/LaTeX), Optimized computation methods, Histograms and visual tools, General concepts and specific distributions

**In-app purchases:** none


### AI Notebook

[App page](https://appshunter.io/ios/app/ai-notebook-ai-note-taker/id6778546092)

This app uses AI to transform spoken words into text, generate summaries, and organize your notes. It's designed to boost productivity for students, professionals, and creators by automating note-taking and content generation.

**Highlights:** Speech to Text Transcription, AI-Powered Note Generation, Automatic Meeting Minutes, Smart Summaries, Voice Recorder, AI Writer for Content

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $3.99 | per 7 days |
| AI Note Taker - Weekly Pro | $3.99 | per 7 days |
| Month | $7.99 | per month |
| AI Note Taker - Monthly Pro | $7.99 | per month |
| Year | $19.99 | per year |
| AI Note Taker - Yearly Pro | $19.99 | per year |


## Frequently asked questions

### Is Discrete Probability free?

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

### Is AI Notebook free?

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

### Which has better reviews, Discrete Probability or AI Notebook?

Discrete Probability is rated higher. Discrete Probability averages 5.0 out of 5 from 3 ratings, while AI Notebook averages 1.0 from 1 ratings.

### Do Discrete Probability or AI Notebook have ads?

Neither Discrete Probability nor AI Notebook shows ads.

### Which is updated more often, Discrete Probability or AI Notebook?

Discrete Probability ships an update every 4 days, and AI Notebook every 3 months. Most recently, Discrete Probability was updated on October 13, 2026 and AI Notebook on October 11, 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.*