# Memory Ark vs Dinox

The clearest difference is rating: Memory Ark at 5.0 against Dinox's 3.7. Dinox's advantage is update cadence (every 3 days vs every 2 months) and ratings volume (6 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Memory Ark sells 2 in-app purchases, starting at $0.99 per month and Dinox sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Memory Ark holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Dinox has 6 ratings behind it against 1, so its average is the more settled of the two.

Memory Ark ships an update every 2 months, Dinox every 3 days. The most recent releases landed on September 19, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Memory Ark | Dinox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memory-ark/id6470735175/reviews)** | [3.7 (6 ratings)](https://appshunter.io/ios/app/dinox/id6502698921/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 232 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [世超 徐](https://appshunter.io/developer/1688946625) | [美勇 周](https://appshunter.io/developer/1628978047) |

## 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 |


### Dinox

[App page](https://appshunter.io/ios/app/dinox/id6502698921)

This app offers AI-powered real-time voice transcription with over 98% accuracy, alongside a personal AI assistant for your notes. It prioritizes data security with a local-first approach and includes features like clipping, AI reading companion, and automatic bi-directional linking for efficient knowledge management.

**Highlights:** Real-time AI voice transcription (98%+ accuracy), Personal AI assistant for notes, Local-first data storage for security, Clipping and AI reading companion, Automatic bi-directional linking, Knowledge base support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 黄金月度会员 | $4.99 | per month |
| 年度会员 | $19.99 | per year |
| Dinox 永久会员 | $69.99 | one-time |


## Frequently asked questions

### Is Memory Ark free?

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

### Is Dinox free?

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

### Which has better reviews, Memory Ark or Dinox?

Memory Ark is rated higher. Memory Ark averages 5.0 out of 5 from 1 ratings, while Dinox averages 3.7 from 6 ratings.

### Do Memory Ark or Dinox have ads?

Neither Memory Ark nor Dinox shows ads.

### Which is updated more often, Memory Ark or Dinox?

Memory Ark ships an update every 2 months, and Dinox every 3 days. Most recently, Memory Ark was updated on September 19, 2026 and Dinox on September 20, 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.*