# AP Calculus AB/BC Test Prep vs BitBitCS

The clearest difference is update cadence: BitBitCS at every 8 days against AP Calculus AB/BC Test Prep's every 5 months. BitBitCS also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support 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 and BitBitCS sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

AP Calculus AB/BC Test Prep ships an update every 5 months, BitBitCS every 8 days. The most recent releases landed on June 8, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | AP Calculus AB/BC Test Prep | BitBitCS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (4 ratings)](https://appshunter.io/ios/app/ap-calculus-abbc-test-prep/id1553023908/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 82 MB | 33 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Expanded Apps, Inc.](https://appshunter.io/developer/313709778) | [LIN SUN](https://appshunter.io/developer/1764594272) |

## What reviewers say

### 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 |


### BitBitCS

[App page](https://appshunter.io/ios/app/bitbitcs/id6661013090)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |


## Frequently asked questions

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

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

### Is BitBitCS free?

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

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

Neither AP Calculus AB/BC Test Prep nor BitBitCS shows ads.

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

AP Calculus AB/BC Test Prep ships an update every 5 months, and BitBitCS every 8 days. Most recently, AP Calculus AB/BC Test Prep was updated on June 8, 2026 and BitBitCS on May 16, 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.*