Memory Ark vs A Plan To Do
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
A Plan To Do
Organize tasks with multi-level Kanban boards and checklists. Improve learning efficiency using Ebbinghaus study plans and develop daily habits with quick clock-in features. A unified calendar view simplifies tracking all your tasks.
- Kanban and checklist task management
- Ebbinghaus study plan creation
- Daily habit development
- Calendar view for schedules
- Template library for scenarios
- Multi-level task organization
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Keep your to-do tasks organized in multi-level management; Improve your learning efficiency with Ebbinghaus plans. ¶ Features ⇀ Kanban & checklist Multi-level management of to-do tasks with checklists, cards and Kanbans; Overview of global progress makes control easy; Out-of-the-box template library serves different scenarios. ⇀ Plan tasks Ebbinghaus plans save your plan creation and management effort; Custom plans give more controls on schedule a sequential of tasks; All for helping you focus on the execution rather than the tool. ⇀ Habits Easily develop good daily habits; Quick clock-in operation for success and failure; Each habit has concise log statistics. ⇀ Schedule Calendar view makes what to do each day noticeable; Unified entrance simplifies check out on different types of tasks. ¶ In-app purchases and auto-renewable subscriptions ⇀ Life Membership With one-time charge of US$19.99 or equivalent currency in your sale region, you can enjoy all the features for a life time. ⇀ Auto-renewing plans Subscription Annual Membership unlocks all the features for a year with a continuous charge of US$12.99 or equivalent currency in your sale region yearly. Subscription Monthly Membership unlocks all the features for a month with a continuous charge of US$2.99 or equivalent currency in your sale region monthly. You are automatically charged near the end of subscription until you manually cancel the subscription in your Subscription Management 24 hours before the auto-renewal. ¶ Services and terms ⇀ Privacy Terms https://www.xcdz123.com/a-plan-privacy-en.html ⇀ Service Terms https://www.xcdz123.com/a-plan-terms-en.html ⇀ Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ¶ Contact us ⇀ E-mail: support@xcdz123.com ⇀ Official website: www.xcdz123.com
Screenshots
Verdict
The clearest difference is update cadence: A Plan To Do at weekly against Memory Ark's every 2 months. On price, rating, ratings volume and ads 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 A Plan To Do sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Memory Ark against 5.0 for A Plan To Do. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Memory Ark ships an update every 2 months, A Plan To Do weekly. The most recent releases landed on September 19, 2026 and September 12, 2026 respectively.
| Parameter | Memory Ark | A Plan To Do |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 6 MB | 31 MB |
| Age rating | 4+ | 12+ |
| Developer | 世超 徐 | Xiaochang Dazuo (Beijing) Technology Co., Ltd. |
Customer experience
Memory Ark
A Plan To Do
In-app purchases
Memory Ark
- Monthly Membership$0.991 Month
- Annual Membership$2.991 Year
A Plan To Do
- Monthly Membership$2.991 Month
- Annual Membership$12.991 Year
- Life Membership$19.99









