# PIS vs 记忆training

The clearest difference is ads: PIS at none against 记忆training's shown. PIS also leads on update cadence (every 5 days vs every 7 months) and iOS requirement (9.0 vs 11.0). On price, 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.

PIS ships an update every 5 days, 记忆training every 7 months. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PIS | 记忆training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 7 months |
| Size | 4 MB | 160 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Henan Wan Biao Information Technology Co., Ltd.](https://appshunter.io/developer/1502830338) | [川 丁](https://appshunter.io/developer/1610501233) |

## What reviewers say

### PIS

[App page](https://appshunter.io/ios/app/pis/id1502830339)

**Features:** macOS Compatibility

**In-app purchases:** none


### 记忆training

[App page](https://appshunter.io/ios/app/training/id1610501231)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PIS free?

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

### Is 记忆training free?

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

### Do PIS or 记忆training have ads?

记忆training shows ads; PIS does not.

### Which is updated more often, PIS or 记忆training?

PIS ships an update every 5 days, and 记忆training every 7 months. Most recently, PIS was updated on October 5, 2026 and 记忆training on October 1, 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.*