# Memory Ark vs DeadLineTodo

The clearest difference is rating: Memory Ark at 5.0 against DeadLineTodo's 4.5. Memory Ark also leads on iOS requirement (15.0 vs 17.0). DeadLineTodo's advantage is update cadence (every 3 days vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Memory Ark sells 2 in-app purchases, starting at $0.99 per month and DeadLineTodo sells 3 in-app purchases, starting at $1.99 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 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Memory Ark ships an update every 2 months, DeadLineTodo every 3 days. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Memory Ark | DeadLineTodo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memory-ark/id6470735175/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/deadlinetodo-ddl-management/id6477158822/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 6 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [世超 徐](https://appshunter.io/developer/1688946625) | [林琴 黄](https://appshunter.io/developer/1519657884) |

## 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 |


### DeadLineTodo

[App page](https://appshunter.io/ios/app/deadlinetodo-ddl-management/id6477158822)

This app helps users manage tasks and combat procrastination with features like progress block tracking, daily widgets, and synchronized reminders. It offers detailed statistics on efficiency, time spent, and task status, with multi-device sync and a dark mode option.

**Highlights:** Progress Block Tracking, Daily Task Widget, Synchronized Reminders, Calendar Synchronization, Repeat Tasks, Task Timer, Efficiency Score Statistics, iCloud Multi-Device Sync

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe to Monthly Premium | $1.99 | per month |
| Subscribe to Quarterly Premium | $2.99 | per 3 months |
| Purchase premium features | $8.99 | one-time |


## Frequently asked questions

### Is Memory Ark free?

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

### Is DeadLineTodo free?

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

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

Memory Ark is rated higher. Memory Ark averages 5.0 out of 5 from 1 ratings, while DeadLineTodo averages 4.5 from 2 ratings.

### Do Memory Ark or DeadLineTodo have ads?

Neither Memory Ark nor DeadLineTodo shows ads.

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

Memory Ark ships an update every 2 months, and DeadLineTodo every 3 days. Most recently, Memory Ark was updated on October 7, 2026 and DeadLineTodo on October 24, 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.*