# 应化e家 vs Pi

The clearest difference is update cadence: Pi at every 11 days against 应化e家's every 9 months. 应化e家's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

应化e家 ships an update every 9 months, Pi every 11 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 应化e家 | Pi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (2 ratings)](https://appshunter.io/ios/app/pi-lab/id6633428384/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 11 days** |
| Monetization | — | Free |
| Size | 283 MB | 68 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Changchun Institute of Applied Chemistry Chinese Academy of Sciences](https://appshunter.io/developer/1544012365) | [湖北鄂仪国际贸易有限公司](https://appshunter.io/developer/1762586431) |

## What reviewers say

### 应化e家

[App page](https://appshunter.io/ios/app/e/id1544414983)

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

**In-app purchases:** none


### Pi

[App page](https://appshunter.io/ios/app/pi-lab/id6633428384)

This utility app focuses on bug fixes and performance improvements. It aims to provide a more stable and reliable user experience by addressing known issues. The latest update ensures smoother operation.

**Highlights:** Bug fixes, Performance improvements, Enhanced stability, Smoother operation

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

**In-app purchases:** none


## Frequently asked questions

### Is 应化e家 free?

应化e家 is free to download, with no in-app purchases.

### Is Pi free?

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

### Do 应化e家 or Pi have ads?

Neither 应化e家 nor Pi shows ads.

### Which is updated more often, 应化e家 or Pi?

应化e家 ships an update every 9 months, and Pi every 11 days. Most recently, 应化e家 was updated on October 2, 2026 and Pi on October 6, 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.*