CalendarTask vs Tendback
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalendarTask
Organize your life with a powerful task management and calendar application. Synchronize across devices, set reminders, and view important dates. Customize your calendar and utilize widgets for quick access to your schedule and upcoming events.
- Cross-platform synchronization
- Lunar and solar calendar view
- Customizable calendar appearance
- Repeat tasks and reminders
- Countdown widgets
- List mode for tasks
- Free widgets
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CalendarTask, no procrastination, efficient life 1. Tasks can be synchronized between mobile phones, computers, and iPad platforms 2. It is convenient to view the lunar calendar, solar terms, holidays, and statutory holidays 3. The computer terminal can be transparently displayed on the computer desktop 4. Repeat tasks and reminders can be set 5. Countdown days, provide 5 kinds of cards (birthday, exam, anniversary, festival, default) and can be set as widgets 6. Powerful calendar settings, you can change the color, size, number of rows displayed, etc. 7. The free widget function is convenient for viewing tasks on the desktop of the mobile phone 9. Provide a list mode to display tasks to facilitate quick browsing of your tasks All of the above functions are available for free Member function 1. It can automatically synchronize tasks in real time between mobile phones, computers, and iPad platforms 2. History records are automatically backed up, viewed, and deleted 3. The sub-account function can record the content of work, life and study separately 4. Unfinished tasks can be set to be automatically extended within a week 5. Online device management, you can view and operate offline client online devices 6. With the same account, there is no limit to the number of logged-in client devices, and you can log in at home, in the company, anywhere Privacy Policy: https://www.xdiarys.com/privacypolicy Terms of Use: https://www.xdiarys.com/eula
Tendback
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Keep the things that need a follow-up in sight. Waiting for a refund, a repair, an application update or a reply? Need to send someone documents or confirm the next step? Tendback is a personal follow-up list for things that are not finished yet. WRITE IT, REVIEW IT, FOLLOW UP Type a sentence such as “Follow up with Support tomorrow” or “Send data to Alex in three days.” Local rules suggest a date, person and direction. You review everything before saving. English and Simplified Chinese are supported; your own text is never translated. SEE WHO NEEDS TO ACT Use Waiting on Me, Waiting on Others and Needs Follow-up to keep actions and replies clear. Review upcoming items for the next seven days. Resolve or abandon an item to move it into history. LOCAL REMINDERS AND WIDGETS Choose reminders for the day before and the follow-up day. Keep the free Needs Follow-up widget on your Home Screen. Notification delivery and widget refresh timing depend on iOS settings and system conditions. FREE CORE, OPTIONAL PRO The free app includes up to eight active items, local reminders, history, six built-in templates and the Needs Follow-up widget. Pro adds unlimited active items, optional private iCloud sync, more Home Screen and Lock Screen widgets, photo attachments, custom templates, Excel and JSON export, and alternate app icons. LOCAL FIRST No account to create. No developer-operated server storing your follow-ups. No advertising SDKs or third-party analytics SDKs. Optional iCloud sync uses your private CloudKit database. Original attachment images stay on the device where they were added; only their metadata syncs. Exports include attachment metadata, not original images, and cannot be imported back for restoration. VOICE WHEN YOUR DEVICE SUPPORTS IT Press and hold to create a draft with on-device speech recognition. Microphone and speech permissions are required. Availability depends on your device and selected language. Typing remains available. PRO PURCHASES Pro is available as a monthly or yearly auto-renewing subscription, or as a one-time lifetime purchase for this app on its current platform. Prices are shown by Apple for your region. Payment is charged to your Apple Account at confirmation. Subscriptions renew unless cancelled at least 24 hours before the current period ends; renewal is charged within 24 hours before that period ends. Manage or cancel subscriptions in Apple Account settings. Restore eligible purchases in the app. Privacy Policy: https://jiaqi1619.cn/genyixia/en/privacy/ Terms of Use: https://jiaqi1619.cn/genyixia/en/terms/ Support: https://jiaqi1619.cn/genyixia/en/support/
Screenshots
Verdict
The clearest difference is update cadence: CalendarTask at fortnightly against Tendback's every 5 weeks. CalendarTask also leads on device support (4 vs 1) and iOS requirement (15.0 vs 17.0). On price, 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. CalendarTask sells 7 in-app purchases, starting at $9.99 per year and Tendback sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
CalendarTask ships an update fortnightly, Tendback every 5 weeks. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.
| Parameter | CalendarTask | Tendback |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (280 ratings) — better | — |
| Positive reviews | 76.0% of reviews | — |
| Number of ratings | 280 — better | — |
| Update frequency | Fortnightly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 77 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Xiaowei Cloud Service Technology Co., Ltd. | 孟奇 李 |
In-app purchases
CalendarTask
- 1 year VIP (7-day free trial)7 Days trial$9.991 Year
- 3 months2 variants$3.99
- 10% off for 3-month$3.99
- 10% off for 1-year$8.99
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- 1 year2 variants$9.99
- 3 years2 variants$19.99
- 10% off for 3-year$19.99
Tendback
- Tendback Pro Monthly$0.991 Month
- Tendback Pro Yearly$4.991 Year
- Tendback Pro Lifetime$12.99









