Daystack: Calendar
Natural-language calendar
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
# Daystack — Natural-language calendar
Type your day. We'll figure out the rest.
Daystack is a modern, on-device calendar layered on top of the calendars you already use — iCloud, Google, Exchange, anything iOS can talk to. Type "lunch with Sarah tomorrow 1pm at Blue Bottle" and Daystack does the rest: it parses the date, time, location, and contact, fills in a draft event, and lets you confirm with one tap.
Built for people who want Apple Calendar with more brain — and zero data tourism.
WHAT MAKES DAYSTACK DIFFERENT
• Natural-language entry, on-device.
Type plain English. Daystack parses date, time, duration, location, attendees, and recurrence — no cloud round-trip. Try "every Monday 10am team standup," "in 2 hours phone call," or "next Friday 2pm dentist."
• Smart travel time.
When two events have locations, Daystack uses MapKit to compute drive / walk / transit time and inserts a "Travel: A → B" block so you don't double-book. Cached on-device; no third-party APIs.
• Calendar Sets.
Create scenes — Work, Life, Family, Travel — each with its own visible calendars. Long-press the app icon to switch in under three seconds. Tie a Set to a Focus mode and Daystack will switch automatically.
• Per-event weather.
Apple WeatherKit shows you what to expect for each event with a location. Cached, anonymous.
• Eight views.
Day, Week, Work Week, Month, Year, List, Timeline (horizontal gantt), and Map. Pick any. Never locked behind a tier.
• Widgets, Live Activities, Watch.
Lock-screen "Next event," home-screen "Today list," 5-week heatmap, Dynamic Island travel countdown, and a Watch app with Complications.
• Privacy by default.
Daystack never operates a server. Your events live in your iCloud / Google / Exchange. We don't read them, store them, or send them anywhere. No analytics SDK. No tracking. No account required.
• ICS import / export.
Pull in any .ics file from Fantastical, Calendars by Readdle, or anywhere else. Export PDF for printing.
PRICING
Daystack is free with a usable free tier. Pro and Pro+ subscriptions unlock unlimited natural-language entries, travel time, weather, widgets, the Watch app, themes, custom phrases, and Pro+ adds CloudKit sync of your settings and Family Sharing for Calendar Sets.
• Pro · Monthly $4.99, Annual $29.99 (save 50%), 7-day free trial
• Pro+ · Monthly $9.99, Annual $59.99 (save 50%), 14-day free trial
Free always includes all 8 views, full event CRUD, two Calendar Sets, manual reminders, ICS import / export, and the basic Watch app. No watermarks. No paywall before your first action.
WHO IT'S FOR
People who outgrew Apple Calendar but never warmed to a $56.99/year subscription. People who want their data to stay with them. People who type fast.
Daystack: the calendar that reads English.
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Daystack Pro subscriptions: Yearly ($9.99/year, 14-day free trial), Monthly ($4.99/month), Pro+ Monthly ($9.99/month), Pro+ Annual ($59.99/year). Payment is charged to your Apple Account at confirmation of purchase. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of the current period. Manage or cancel anytime in Settings → Apple ID.
Terms of Use (EULA): https://leexuanxuan95-dev.github.io/calendar/eula.html
Privacy Policy: https://leexuanxuan95-dev.github.io/calendar/privacy.html
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Added a one-time Lifetime unlock in the paywall — pay once, unlock every Pro feature forever. Plus WeatherKit attribution refresh and stability fixes.
The developer, jiahao zhang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- jiahao zhang
- Size
- 2.7 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Daystack Yearly USD 9.99
- Pro+ Monthly USD 9.99
- Pro Annual USD 29.99
- Pro Monthly USD 4.99
- Pro+ Annual USD 59.99
- Copyright
- © 2026 Daystack: Calendar
