[ Package conformance ]

Expo SDK · >=13.0.0

expo-calendar

native-seam: upstream expo-calendar JS runs from the bundle over an in-memory EventKit-shaped store seeded faithfully to a fresh iOS Simulator — a writable local "Calendar" on the "Default" local source plus the always-present read-only "Birthdays" calendar, so getCalendarsAsync/getDefaultCalendarAsync match what a real RN app sees on the conformance Simulator (no sootsim brand names leak into guest calendar pickers). create/read/update/delete then mutate that store like EKEventStore. daily recurrence queries expand lazily inside the requested range and preserve local wall times across named-zone offset changes.

80%

API coverage

← iOS 26.4|Peach →

expo-calendarExpo Calendarexpo-calendar dense permission and event lifecycle. Proves default-calendar lookup, create, fetch-by-id, update, range query, attendees, and removal in six visual checkpoints.

Diff0.19%

DeviceiPhone 16

OracleiOS 26.4

CapturedAug 20, 2026

iOS 26.4PeachDiff

Expo CalendariOS 26.4

Working (10)

reference-Simulator default calendar set (writable "Calendar" + read-only "Birthdays"faithful "Default" local source); real RN + sootsim validated event permission/create/read/update/range-query/attendee-read/delete smoke; upstream enums and JS validationcreate/update/delete calendarscreate/list/get/update/delete events with date-range filtering; sootsim-validated bounded daily recurrence expansion with interval/count rulesinclusive overlap boundariesnamed time zonesand whole-series update/delete; attendee readscreate/list/get/update/delete remindersopen/edit dialog functions safely resolveall permission functions

Missing (7)

real EventKit / CalendarContract access (the in-memory store does not surface events the user actually owns)calendar sync across processes/reloadsnative calendar UI dialogs (presentEvent/createEventDialog)weekly/monthly/yearly and advanced recurrence rule expansiondetached-instance and future-split mutation semanticsattendee response/availability semanticsexact per-iOS-version Simulator calendar set (the seeded "Calendar"/"Birthdays" pair is the stable baseline)