diff --git a/PARITY_CHECKLIST.md b/PARITY_CHECKLIST.md
index c6542d1e..9166f36e 100644
--- a/PARITY_CHECKLIST.md
+++ b/PARITY_CHECKLIST.md
@@ -153,7 +153,7 @@ Open split them by tick; the P columns count the priority tags on those items
 | #47 Account security not accessible | [01](docs/parity/01-auth-accounts.md) capability map bug (P1) |
 | #46 email preview shows css | [03](docs/parity/03-email-viewer.md) HTML-only body detection (P1) |
 | #45 error when re-registering to relay | [08](docs/parity/08-settings-push-i18n-ui.md) push section |
-| #34 Native contacts/calendar sync adapters | feature request, out of parity scope; noted in [06](docs/parity/06-contacts.md) |
+| #34 Native contacts/calendar sync adapters | done on Android: Settings → Contacts / Calendar → "Sync to this device" syncs both ways with the device's Contacts and Calendar apps ([design](docs/device-sync.md)); iOS has no API for it |
 | #5 Sort ascending/descending | in progress in the working tree; ordering presets in [02](docs/parity/02-mail-list-folders.md) |
 | #3 TLS client auth | Android-only today; gaps in [01](docs/parity/01-auth-accounts.md) and [09](docs/parity/09-jmap-core-sync-security.md) |
 | #1 Shared settings between webmail and native | [08](docs/parity/08-settings-push-i18n-ui.md) — webmail sync is server-side/cookie-bound; a JMAP-blob design is sketched there |
diff --git a/README.md b/README.md
index 87861346..6ca38d01 100644
--- a/README.md
+++ b/README.md
@@ -22,11 +22,12 @@ React Native (Expo SDK 54) client for [Bulwark Webmail](https://github.com/bulwa
 - Calendar (basic)
 - Contacts (basic)
 - Push notifications via the Bulwark relay - FCM by default, or [UnifiedPush](https://unifiedpush.org) (e.g. ntfy) for devices without Google Play services
+- Android: contacts and calendars sync both ways with the phone's Contacts and Calendar apps (Settings → Contacts / Calendar → Sync to this device)
 - In-app sideload updates from GitHub Releases
 
 ## What's missing or rough
 
-- iOS builds, but push notifications and client certificates are Android-only so far
+- iOS builds, but push notifications, client certificates and syncing with the phone's contacts and calendars are Android-only so far
 - S/MIME, plugins, themes - UI stubs only (filters & rules, the vacation responder and file storage are real implementations)
 - Calendar editing is partial; contacts editing is basic
 - No Play Store distribution yet (sideload APK from Releases); iOS ships via TestFlight
diff --git a/docs/audit-2026-09.md b/docs/audit-2026-09.md
index 0cfcdc48..2c0ccc98 100644
--- a/docs/audit-2026-09.md
+++ b/docs/audit-2026-09.md
@@ -1020,7 +1020,8 @@ ones moved to the N/A lists, and the wrong text corrected.
 | #46 email preview shows CSS | Not reproduced: HTML-only mail with `<style>` shows clean previews, and the viewer routes by type (`06742ef`). Ask for a sample, then close. |
 | #44, #48 push without FCM / UnifiedPush | Uncommitted work in this tree; not in any release. Committed in `ee04e95`; not released yet. |
 | #3 TLS client auth | Partial: Android has a certificate picker (Settings → Security); iOS doesn't. |
-| #58 encryption, #52 widgets, #51 IMAP/SMTP, #34 sync adapters, #1 settings sync | Feature requests; see open questions. |
+| #34 sync adapters | Done on Android: contacts and calendars sync both ways with the device's apps ([design](device-sync.md)). |
+| #58 encryption, #52 widgets, #51 IMAP/SMTP, #1 settings sync | Feature requests; see open questions. |
 
 No open webmail issue is about the native app. The six mobile-titled ones (#813, #838, #915,
 #969, #999, #1020) concern the web and PWA.
@@ -1042,8 +1043,7 @@ No open webmail issue is about the native app. The six mobile-titled ones (#813,
   for the page to be visible for some time, or apply only to the message that was actually
   opened? Decided in `5f3f584`: only the page on screen auto-sends, once per message per session.
 - **Settings sync (#1):** needs a server-side store, which neither client has today.
-- **Scope of the feature requests:** encryption (#58), widgets (#52), IMAP/SMTP (#51) and native
-  sync adapters (#34).
+- **Scope of the feature requests:** encryption (#58), widgets (#52) and IMAP/SMTP (#51).
 
 ## Reproducing
 
diff --git a/docs/parity/06-contacts.md b/docs/parity/06-contacts.md
index 558267f6..21a57355 100644
--- a/docs/parity/06-contacts.md
+++ b/docs/parity/06-contacts.md
@@ -315,4 +315,4 @@ RN covers the visible surface reasonably well (list with alphabetical index, det
 - Print contact (`components/contacts/contact-print.ts`).
 - Plugin contact APIs and the `contact-cryptokeys` plugin slot.
 - `mailto:`/`tel:` handoff differences (RN uses `Linking`).
-- Native issue #34 (device contacts / calendar sync adapters) is a feature request, not a parity item; note that a device sync would want the UID (#644) and PartialDate (#224) fixes above first.
+- Native issue #34 (device contacts / calendar sync adapters) is not a parity item; it is done on Android (Settings → Contacts → "Sync to this device", [design](../device-sync.md)) and builds on the UID (#644) and PartialDate (#224) fixes above.