# 瞬间记忆 vs iMemory

The clearest difference is update cadence: iMemory at monthly against 瞬间记忆's every 13 months. 瞬间记忆's advantage is iOS requirement (9.0 vs 16.0). 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.

瞬间记忆 ships an update every 13 months, iMemory monthly. Both last shipped on October 26, 2026.

## The numbers

| Metric | 瞬间记忆 | iMemory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 13 months | **Monthly** |
| Size | 13 MB | 5 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [习堂 刘](https://appshunter.io/developer/998087258) | [景珂 陈](https://appshunter.io/developer/620312170) |

## What reviewers say

### 瞬间记忆

[App page](https://appshunter.io/ios/app/id1088520570)

**Features:** macOS Compatibility

**In-app purchases:** none


### iMemory

[App page](https://appshunter.io/ios/app/imemory-brain-training/id1227225034)

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

**In-app purchases:** none


## Frequently asked questions

### Is 瞬间记忆 free?

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

### Is iMemory free?

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

### Do 瞬间记忆 or iMemory have ads?

Both 瞬间记忆 and iMemory show ads.

### Which is updated more often, 瞬间记忆 or iMemory?

瞬间记忆 ships an update every 13 months, and iMemory monthly. Most recently, 瞬间记忆 was updated on October 26, 2026 and iMemory on October 26, 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.*