# MemU vs constant.

The clearest difference is update cadence: constant. at every 3 days against MemU's weekly. MemU's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.6). On price, ads and in-app purchases there is nothing between them.

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

MemU ships an update weekly, constant. every 3 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | MemU | constant. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/memu-flashcard-20/id6742653596/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free | — |
| Size | 318 MB | 28 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Daoyehuo Technology Co.Ltd](https://appshunter.io/developer/1437218115) | [Chun-Huei Liu](https://appshunter.io/developer/1657411874) |

## What reviewers say

### MemU

[App page](https://appshunter.io/ios/app/memu-flashcard-20/id6742653596)

This app allows users to import, study, and edit Anki flashcard decks offline on their iPhone and iPad. It supports various note types and offers a distraction-free interface for efficient learning.

**Highlights:** Import .apkg flashcard decks, Study with spaced repetition, Edit cards directly on device, Supports various note types (cloze, image occlusion, MathJax), 100% offline functionality, Export decks anytime, Modern, distraction-free UI

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

**In-app purchases:** none


### constant.

[App page](https://appshunter.io/ios/app/constant/id6748115880)

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

**In-app purchases:** none


## Frequently asked questions

### Is MemU free?

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

### Is constant. free?

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

### Do MemU or constant. have ads?

Neither MemU nor constant. shows ads.

### Which is updated more often, MemU or constant.?

MemU ships an update weekly, and constant. every 3 days. Most recently, MemU was updated on October 24, 2026 and constant. 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.*