# AP Calculus AB Exam Study Prep vs Counting and Probability

The clearest difference is rating: Counting and Probability at 5.0 against AP Calculus AB Exam Study Prep's 3.3. Counting and Probability also leads on ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Counting and Probability holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

AP Calculus AB Exam Study Prep ships an update every 5 months, Counting and Probability every 8 months. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | AP Calculus AB Exam Study Prep | Counting and Probability |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/ap-calculus-ab-exam-study-prep/id1645116125/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/counting-and-probability/id6444738269/reviews)** |
| Number of ratings | 3 | **7** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 8 months |
| Monetization | Ad-supported | **Free** |
| Size | 8 MB | 8 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Golden Mind Services LTD](https://appshunter.io/developer/417614614) | [DEEPPATH LLC](https://appshunter.io/developer/1531915855) |

## What reviewers say

### AP Calculus AB Exam Study Prep

[App page](https://appshunter.io/ios/app/ap-calculus-ab-exam-study-prep/id1645116125)

Prepare for the AP Calculus AB exam with this comprehensive practice guide. It offers over 500 questions, offline access, and progress tracking features to help you study effectively. Review answers and focus on areas needing improvement.

**Highlights:** Over 500 practice questions, Offline access, Answer review, Progress tracking, Targeted practice on incorrect answers, Customizable quizzes

**Features:** macOS Compatibility

**In-app purchases:** none


### Counting and Probability

[App page](https://appshunter.io/ios/app/counting-and-probability/id6444738269)

Access a curated collection of math competition problems focused on counting and probability. This app provides detailed solutions, bookmarking features for review, and note-taking capabilities to aid your study.

**Highlights:** Math competition problem collection, Detailed solutions provided, Bookmark problems for review, Note-taking for study, Organized problem collection

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

**In-app purchases:** none


## Frequently asked questions

### Is AP Calculus AB Exam Study Prep free?

AP Calculus AB Exam Study Prep is free to download, with no in-app purchases.

### Is Counting and Probability free?

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

### Which has better reviews, AP Calculus AB Exam Study Prep or Counting and Probability?

Counting and Probability is rated higher. AP Calculus AB Exam Study Prep averages 3.3 out of 5 from 3 ratings, while Counting and Probability averages 5.0 from 7 ratings.

### Do AP Calculus AB Exam Study Prep or Counting and Probability have ads?

AP Calculus AB Exam Study Prep shows ads; Counting and Probability does not.

### Which is updated more often, AP Calculus AB Exam Study Prep or Counting and Probability?

AP Calculus AB Exam Study Prep ships an update every 5 months, and Counting and Probability every 8 months. Most recently, AP Calculus AB Exam Study Prep was updated on October 6, 2026 and Counting and Probability on October 13, 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.*