# 阅燃 vs Functions and integrals

The clearest difference is in-app purchases: 阅燃 at none against Functions and integrals's 2. Functions and integrals's advantage is update cadence (every 5 days vs monthly) and iOS requirement (9.0 vs 11.0). On price, ads and device support there is nothing between them.

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

阅燃 ships an update monthly, Functions and integrals every 5 days. The most recent releases landed on October 5, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 阅燃 | Functions and integrals |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 101 MB | 28 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chengdu Zhixin Technology Co,.Ltd.](https://appshunter.io/developer/1536893274) | [Maxime Haeyaert](https://appshunter.io/developer/1274130669) |

## What reviewers say

### 阅燃

[App page](https://appshunter.io/ios/app/id1186238420)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 阅燃 free?

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

### Is Functions and integrals free?

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

### Do 阅燃 or Functions and integrals have ads?

Neither 阅燃 nor Functions and integrals shows ads.

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

阅燃 ships an update monthly, and Functions and integrals every 5 days. Most recently, 阅燃 was updated on October 5, 2026 and Functions and integrals on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*