# Functions and integrals vs 试题库

The clearest difference is in-app purchases: 试题库 at none against Functions and integrals's 2. Functions and integrals's advantage is update cadence (every 5 days vs every 3 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Functions and integrals sells 2 one-off in-app purchases. 试题库 asks for nothing beyond the download.

Functions and integrals ships an update every 5 days, 试题库 every 3 months. The most recent releases landed on September 28, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Functions and integrals | 试题库 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 18 MB |
| Requires iOS | **9.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Maxime Haeyaert](https://appshunter.io/developer/1274130669) | [中科软股教育科技(北京)股份有限公司](https://appshunter.io/developer/1395665821) |

## What reviewers say

### Functions and integrals

[App page](https://appshunter.io/ios/app/functions-and-integrals/id1331081431)

This app quickly resolves integrals using a powerful algorithm. It calculates integrals of functions and composite functions, providing detailed steps for easy exercise solving and calculation checking. Simply input your function and let the app handle the rest.

**Highlights:** Integral calculation, Composite function integration, Detailed calculation steps, Quick problem solving, Easy function input

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advertising | $0.99 | one-time |
| Details and Formulas | $1.99 | one-time |


### 试题库

[App page](https://appshunter.io/ios/app/id1478850740)

**In-app purchases:** none


## Frequently asked questions

### Is Functions and integrals free?

Functions and integrals is free to download, with in-app purchases available.

### Is 试题库 free?

试题库 is free to download, with no in-app purchases.

### Do Functions and integrals or 试题库 have ads?

Neither Functions and integrals nor 试题库 shows ads.

### Which is updated more often, Functions and integrals or 试题库?

Functions and integrals ships an update every 5 days, and 试题库 every 3 months. Most recently, Functions and integrals was updated on September 28, 2026 and 试题库 on October 17, 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.*