# Memory Ark vs Attention Flow

The clearest difference is in-app purchases: Attention Flow at none against Memory Ark's 2. Attention Flow also leads on update cadence (every 2 weeks vs every 2 months). Memory Ark's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Memory Ark sells 2 in-app purchases, starting at $0.99 per month. Attention Flow asks for nothing beyond the download.

Memory Ark ships an update every 2 months, Attention Flow every 2 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Memory Ark | Attention Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memory-ark/id6470735175/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [世超 徐](https://appshunter.io/developer/1688946625) | [可心 周](https://appshunter.io/developer/1868083044) |

## What reviewers say

### Memory Ark

[App page](https://appshunter.io/ios/app/memory-ark/id6470735175)

This app helps users combat forgetting by using the Ebbinghaus Forgetting Curve to create personalized review schedules. It offers features like task management, progress tracking, and smart rescheduling to make learning more efficient and effective.

**Highlights:** Ebbinghaus Forgetting Curve integration, Daily and calendar task management, Task categorization with tags, Detailed review session data, Customizable memory curves, Smart task rescheduling, Retroactive check-in for missed tasks

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| Annual Membership | $2.99 | per year |


### Attention Flow

[App page](https://appshunter.io/ios/app/attention-flow/id6775757600)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Memory Ark free?

Memory Ark is free to download, with in-app purchases available.

### Is Attention Flow free?

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

### Do Memory Ark or Attention Flow have ads?

Neither Memory Ark nor Attention Flow shows ads.

### Which is updated more often, Memory Ark or Attention Flow?

Memory Ark ships an update every 2 months, and Attention Flow every 2 weeks. Most recently, Memory Ark was updated on November 3, 2026 and Attention Flow on November 5, 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.*