# 泉家共成长 vs Pi Sequence

The clearest difference is in-app purchases: 泉家共成长 at none against Pi Sequence's 1. 泉家共成长 also leads on iOS requirement (9.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Pi Sequence sells 1 one-off in-app purchase. 泉家共成长 asks for nothing beyond the download.

泉家共成长 ships an update every 2 months, Pi Sequence every 3 months. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 泉家共成长 | Pi Sequence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/id1465186576/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 88 MB | 29 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shandong Happy Road Education Technology Co., Ltd.](https://appshunter.io/developer/1494849296) | [晓灵 潘](https://appshunter.io/developer/6781908128) |

## What reviewers say

### 泉家共成长

[App page](https://appshunter.io/ios/app/id1465186576)

**In-app purchases:** none


### Pi Sequence

[App page](https://appshunter.io/ios/app/pi-sequence-memorize-pi/id6783736734)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $3.99 | one-time |


## Frequently asked questions

### Is 泉家共成长 free?

泉家共成长 is free to download, with no in-app purchases.

### Is Pi Sequence free?

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

### Do 泉家共成长 or Pi Sequence have ads?

Neither 泉家共成长 nor Pi Sequence shows ads.

### Which is updated more often, 泉家共成长 or Pi Sequence?

泉家共成长 ships an update every 2 months, and Pi Sequence every 3 months. Most recently, 泉家共成长 was updated on October 17, 2026 and Pi Sequence on October 10, 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.*