# Dual Calendar - Day Counter — Stay Organized and On Time! > All-in-one organizer for notes, calendars, and daily tasks with collaboration. (iPhone/iPad app by Han Chang Lin.) - Source: https://appshunter.io/ios/app/dual-calendar-day-counter/id1225813908 (this page in markdown: same URL + `.md`) - Developer: [Han Chang Lin](https://appshunter.io/developer/1074348727) - Category: Utilities, Productivity - Price: $19.99 (on sale, was $99.99) - Age rating: 4+ - Requires: iOS 11.0 · 39 MB - Languages: American English - Released: 2017-04-13 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/dual-calendar-day-counter/id1225813908/reviews.md ## What is Dual Calendar? Manage your notes, calendar, and daily tasks all in one place with our practical and efficient app. Our user-friendly WYSIWYG interface allows you to easily make quick edits to events, adjust dates and locations, and measure time spent on each task. Collaborate with others, manage multiple calendars, and enjoy additional features like notepad functionality and note content sharing. Our app is an essential tool for anyone on-the-go. Dual Calendar now supports iOS App Family Sharing, so you can share the benefits with your loved ones with just one purchase. For more information, visit our website at https://hanchanglin.wixsite.com/website ## Key features - Note management - Calendar integration - Daily task tracking - WYSIWYG editor - Time measurement for tasks - Collaboration features - Family sharing support ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/dual-calendar-day-counter/id1225813908/reviews.md ### 1/5 — still (!) must use v10.5.0 on iOS 10.3.3 *2018-10-05* UPDATE: I've tried v10.8.0 and now v11.1.0, and neither of them works; also, your Dual Web Browser has the same problem. This WAS a nice little utility program that I would use a few times every week for planning my schedule, but these updates killed it for me. This probably has to do with the fact that I'm still using iOS10, but now every time I try to run it, it immediately loses focus, and refuses to come to the foreground. Luckily, I managed to get the old version back, but most people wouldn't have a way to do this. **Developer response:** We have updated the latest SDK. Please check it again. Thank you! ### 1/5 — Crashes iOS 10.3 *2018-06-20* As developer reply and informed that JB not supported, I never JB my devices so address the issues and previous review still valid, Looks good but not working and always crashes previously complained the user but developer have no attention to solve the issues. i can't open it. Plz check it Developer **Developer response:** Thank you for your opinion, we will continue to optimize this app. Please note that this app does not support JB device. ## Frequently asked questions about Dual Calendar ### What is the price of Dual Calendar? Dual Calendar is a paid application with a one-time purchase price of $19.99. This purchase grants access to all features and supports iOS App Family Sharing. ### Does Dual Calendar have ads? No, Dual Calendar does not contain advertisements. It is a paid application designed to provide an uninterrupted user experience. ### What devices does Dual Calendar support? Dual Calendar is available for iPhone, iPad, and iPod touch devices. It is optimized for a seamless experience across Apple's mobile ecosystem. ### How often is Dual Calendar updated? The latest version of Dual Calendar is 23.2.0, last updated on March 13, 2023. Updates typically include new features, bug fixes, and performance improvements. ### Can I share Dual Calendar with my family? Yes, Dual Calendar supports iOS App Family Sharing. This allows you to share the application and its benefits with your loved ones after a single purchase. ### What is the age rating for Dual Calendar? Dual Calendar has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions. ### What kind of collaboration features does Dual Calendar offer? Dual Calendar allows collaboration with others, enabling shared management of calendars and tasks. You can also share note content with other users. ### How does Dual Calendar help with task management? Dual Calendar allows you to manage daily tasks efficiently. Its WYSIWYG interface enables quick edits, and you can measure the time spent on each task. ## Version history (last 5 releases) ### 23.2.0 — 2023-03-13 Thank you for choosing Dual Calendar! This release features improved stability and performance. ### 22.0.0 — 2023-02-22 Thank you for choosing Dual Calendar! This release features improved stability and performance. ### 21.0.0 — 2022-07-21 Thank you for choosing Dual Calendar - CalendarX2! This release contains the following updates: • Improved stability and performance. ### 20.0.0 — 2022-04-14 Thank you for choosing Dual Calendar - CalendarX2! This release contains the following updates: • Improved stability and performance. ### 19.0.0 — 2022-01-06 Optimized for iPad mini 6. ## Apps similar to Dual Calendar | App | Rating | Price | Category | | --- | --- | --- | --- | | [Countdown](https://appshunter.io/ios/app/countdown/id1403367428) | 4.7 (19,784) | Free | Utilities | ## More apps by Han Chang Lin - [Daily Voice Notes](https://appshunter.io/ios/app/daily-voice-notes/id1074348728) - [UltraPixel - Precision editing](https://appshunter.io/ios/app/ultrapixel-precision-editing/id1074587629) - [RecordVoiceRecord -Sound Diary](https://appshunter.io/ios/app/recordvoicerecord-sound-diary/id1075040339) - [FaveFlick - Fast Site Switcher](https://appshunter.io/ios/app/faveflick-fast-site-switcher/id1075738307) - [EditMatch Duo - Dual WordPad](https://appshunter.io/ios/app/editmatch-duo-dual-wordpad/id1086371070) - [Dual WordPad](https://appshunter.io/ios/app/dual-wordpad/id1086622576) All apps by Han Chang Lin: https://appshunter.io/developer/1074348727 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*