# DueStack — Countdowns on Lock Screen

> Countdowns on Lock Screen (iPhone/iPad app by KUAN-HAO SU.)

- Source: https://appshunter.io/ios/app/duestack/id6765793052 (this page in markdown: same URL + `.md`)
- Developer: [KUAN-HAO SU](https://appshunter.io/developer/1828326786)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English
- Released: 2026-05-18
- Data updated: 2026-07-31
- User reviews in markdown: https://appshunter.io/ios/app/duestack/id6765793052/reviews.md

## What is DueStack?

DueStack keeps the dates that matter most visible, so important deadlines are never buried in a calendar.

Create countdowns for paper submissions, trips, birthdays, anniversaries, subscription renewals, ticket drops, and the dates you cannot afford to miss. Pin the most important events to your Lock Screen and Dynamic Island with Live Activities, then tap any countdown to jump straight back to its detail page.

Features:
- Track upcoming deadlines, events, birthdays, anniversaries, and renewals
- Pin countdowns to the Lock Screen with Live Activities
- See glanceable countdowns in Dynamic Island and Lock Screen widgets
- Open a pinned countdown directly from the system surface
- Use count-up mode for past events and yearly recurring birthdays or anniversaries
- Sync privately across your devices with iCloud and CloudKit

DueStack does not require an account with us, does not use advertising trackers, and does not send your countdown data to our servers.


## Version history (last 1 release)

### 1.0 — 2026-05-18

No release notes.

## More apps by KUAN-HAO SU

- [Happy Tip - Tip Calculator](https://appshunter.io/ios/app/happy-tip-tip-calculator/id6748970700)
- [TimeZoneMeet - Time Comparison](https://appshunter.io/ios/app/timezonemeet-time-comparison/id6761637596)
- [Three Tasks - Daily To Do List](https://appshunter.io/ios/app/three-tasks-daily-to-do-list/id6761807073)
- [Glucose Tracker - GDM Diary](https://appshunter.io/ios/app/glucose-tracker-gdm-diary/id6761887668)
- [Book Page Tracker](https://appshunter.io/ios/app/book-page-tracker/id6765789624)

All apps by KUAN-HAO SU: https://appshunter.io/developer/1828326786

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*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 2026-07-31.*