Memory Ark vs DeadLineTodo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Memory Ark
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.
- 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
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The biggest challenge in memory is combating forgetting. Forgetting is a natural human tendency, and this principle was discovered long ago by Ebbinghaus, known as the famous Ebbinghaus Forgetting Curve. Our software incorporates the Ebbinghaus Curve to create detailed reminder plans. Users only need to complete their daily tasks on time to achieve long-term memory, making learning more efficient. Learning itself is complex, and designing a simple and user-friendly app is our core principle. Features of this software: 1. Today's Tasks: Review the intelligently scheduled daily tasks on time. 2. Calendar Tasks: View the number of daily tasks at a glance for better planning. 3. All Tasks: All tasks are grouped by status, keeping progress fully under control. 4. Node Preview: Track detailed data on each review session for strategic planning. 5. Custom Curve: Customize your memory curve based on personal habits—what suits you best. 6. Task Tags: Categorize tasks systematically, with home page tasks displayed in tag order. 7. Smart Postponement: Delayed task nodes are automatically rescheduled, preventing memory confusion. 8. Retroactive Check-in: A powerful make-up feature—no matter how many days you missed, you can still check in. Auto-Renewable Subscription Service Description Subscription Services: Monthly Membership (Auto-Renewable Monthly) Annual Membership (Auto-Renewable Yearly) Subscription Prices: Monthly Membership: $0.99/month (approx. 3 CNY) Annual Membership: $2.99/year (approx. 18 CNY) Payment: Payment will be charged to your iTunes account upon confirmation of purchase. Auto-Renewal: Your iTunes account will be charged within 24 hours before the end of the current subscription period. Upon successful payment, the subscription period will be extended for another term. Cancellation: You can turn off auto-renewal at any time by going to your iTunes/Apple ID settings at least 24 hours before the end of the current subscription period. No further charges will be applied after cancellation. Contact Us: If you encounter any issues, please contact us at: zhiledaoyuan@sina.com Terms of Use: https://www.yuque.com/zldy/ni1wwu/etyg8a76ok26n9c1 Privacy Policy: https://www.yuque.com/zldy/ni1wwu/upx1vcs1g1ng60pr
DeadLineTodo
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.
- Progress Block Tracking
- Daily Task Widget
- Synchronized Reminders
- Calendar Synchronization
- Repeat Tasks
- Task Timer
- Efficiency Score Statistics
- iCloud Multi-Device Sync
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As an INFP I have a real headache with procrastination and decided to develop an efficiency app to help me catch up with DeadLine! -- Software Features -- Progress Block Tracking (width indicates time required for task) Daily Task Widget Reminders Synchronisation (to-do page drop down to refresh) Calendar Synchronisation (same as above) Repeat Tasks Task Timer Urgent/Timeout/Overdue Notification Reminders Efficiency Score Statistics Accumulated Time Spent Statistics Time Difference Statistics Heat Map Statistics Search Tasks Dark Mode iCloud Multi-Device Sync EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://privacy.1ts.fun/product/240215ZQ15RbX8mfZIgP Positive feedback is welcome!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Memory Ark | DeadLineTodo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 世超 徐 | 林琴 黄 |
Customer experience
Memory Ark
DeadLineTodo
In-app purchases
Memory Ark
- Monthly Membership$0.991 Month
- Annual Membership$2.991 Year
DeadLineTodo
- Subscribe to Monthly Premium$1.991 Month
- Subscribe to Quarterly Premium$2.993 Months
- Purchase premium features$8.99
