# Formulus Free vs AP Calculus AB/BC Test Prep

The clearest difference is rating: Formulus Free at 5.0 against AP Calculus AB/BC Test Prep's 3.5. Formulus Free also leads on in-app purchases (none vs 4) and review sentiment (81% vs 50%). AP Calculus AB/BC Test Prep's advantage is ads (none vs shown). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. AP Calculus AB/BC Test Prep sells 4 in-app purchases, starting at $6.99 per 7 days. Formulus Free asks for nothing beyond the download.

Formulus Free holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews point the same way: 81% of Formulus Free's written reviews are positive against 50% of AP Calculus AB/BC Test Prep's.

Formulus Free ships an update every 6 weeks, AP Calculus AB/BC Test Prep every 5 months. The most recent releases landed on October 7, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Formulus Free | AP Calculus AB/BC Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/formulus-free/id309681718/reviews)** | [3.5 (4 ratings)](https://appshunter.io/ios/app/ap-calculus-abbc-test-prep/id1553023908/reviews) |
| Number of ratings | **5** | 4 |
| Positive reviews | **81.1% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 12 MB | 82 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Daniel Byon](https://appshunter.io/developer/309681721) | [Expanded Apps](https://appshunter.io/developer/313709778) |

## What reviewers say

### Formulus Free

[App page](https://appshunter.io/ios/app/formulus-free/id309681718)

Access a comprehensive collection of essential math formulas for high school and college calculus students. Quickly find the formulas you need without flipping through textbooks or searching online.

**Highlights:** Calculus formula collection, Algebra and Geometry formulas, Derivatives, Integrals, Limits, Trigonometry, Vectors

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

**In-app purchases:** none

**What reviewers like**

- 👍 Excellent organization and easy navigation
- 🚀 Quick and convenient formula lookup
- 📚 Comprehensive coverage of calculus and math formulas
- 💰 Free app with extensive content
- 🎓 Great study and review tool for students

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 📱 Poor compatibility with larger iPhone screens
- ❌ Some formulas contain errors or typos
- 🔍 Missing several important formulas and topics
- 📊 No interactive features or worked examples

**Reported bugs**

- App crashes on startup after updates
- Freezing and lag issues during use
- Compatibility issues with larger iPhone screens
- Incorrect cross product entry formula
- Error in Simpson's rule integral approximation

**Requested features**

- Add practice problems and worked examples
- Include inverse trigonometric functions
- Add 3D shapes and geometry formulas
- Implement search functionality for quick formula finding
- Add graphing and calculation capabilities


### AP Calculus AB/BC Test Prep

[App page](https://appshunter.io/ios/app/ap-calculus-abbc-test-prep/id1553023908)

Prepare for your AP Calculus AB/BC exam with 500 practice questions covering all topics. Detailed explanations are provided for each question, simulating the real exam experience. Track your progress and study effectively to achieve your best score.

**Highlights:** 500 AP-style questions and answers, Detailed review explanations, Simulates real AP exam, Updated material, Study, Timed Exam, and Bookmark modes, Progress tracking, iCloud save functionality

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week | $6.99 | per 7 days |
| 1 Month | $17.99 | per month |
| 1 Year | $69.99 | per year |
| AP Calculus AB/BC Exam Prep | $15.99 | one-time |


## Frequently asked questions

### Is Formulus Free free?

Formulus Free is free to download, with no in-app purchases.

### Is AP Calculus AB/BC Test Prep free?

AP Calculus AB/BC Test Prep is free to download, with in-app purchases available.

### Which has better reviews, Formulus Free or AP Calculus AB/BC Test Prep?

Formulus Free is rated higher. Formulus Free averages 5.0 out of 5 from 5 ratings, while AP Calculus AB/BC Test Prep averages 3.5 from 4 ratings.

### Do Formulus Free or AP Calculus AB/BC Test Prep have ads?

Formulus Free shows ads; AP Calculus AB/BC Test Prep does not.

### Which is updated more often, Formulus Free or AP Calculus AB/BC Test Prep?

Formulus Free ships an update every 6 weeks, and AP Calculus AB/BC Test Prep every 5 months. Most recently, Formulus Free was updated on October 7, 2026 and AP Calculus AB/BC Test Prep on September 23, 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.*