Version 2.5

* update ical4j: now allows UTC properties to have non-UTC values for compatibility
* use AndroidX Room for database access
* AccountActivity reworked
  - use tabs for CalDAV/CardDAV/Webcal
  - use RecyclerView, PagedList adapter and Room observeable queries for best performance even with huge lists
  - progress bars now also show pending syncs
* DavService: don't delete all homesets/collections on refresh, but update only changed rows
* vCard: use "groupX" instead of "davdroidX" for property grouping
* use Conscrypt to bring modern TLS versions/ciphers to all supported Android versions
* many small improvements and bug fixes

Version 2.5-beta2

Changes since 2.4.0.1:

* update ical4j: now allows UTC properties to have non-UTC values for compatibility
* use AndroidX Room for database access
* AccountActivity reworked
  - use tabs for CalDAV/CardDAV/Webcal
  - use RecyclerView, PagedList adapter and Room observeable queries for best performance even with huge lists
  - progress bars now also show pending syncs
* DavService: don't delete all homesets/collections on refresh, but update only changed rows
* vCard: use "groupX" instead of "davdroidX" for property grouping
* use Conscrypt to bring modern TLS versions/ciphers to all supported Android versions
* many small improvements and bug fixes

Version 2.5-beta1

Changes since 2.4.0.1:

* update ical4j: now allows UTC properties to have non-UTC values for compatibility
* use AndroidX Room for database access
* AccountActivity reworked
  - use tabs for CalDAV/CardDAV/Webcal
  - use RecyclerView, PagedList adapter and Room observeable queries for best performance even with huge lists
  - progress bars now also show pending syncs
* DavService: don't delete all homesets/collections on refresh, but update only changed rows
* vCard: use "groupX" instead of "davdroidX" for property grouping
* use Conscrypt to bring modern TLS versions/ciphers to all supported Android versions
* many small improvements and bug fixes

Version 2.4.0.1

[Hotfix] AccountActivity: avoid endless loop of asking for permissions

Version 2.4

* completely rewrite UI architecture (use ViewModel instead of Loaders)
* improve robustness and responsiveness, especially when there are a lot of collections
* improve UI to make it more Material (for instance, use progress bars instead of deprecated progress dialogs)
* improve read-only contact behavior (contacts from read-only address books are now marked as read-only; in most Contact apps, you can still edit those contacts, but the changes will not persist)
* notify on invalid events, too (since 2.3, invalid tasks/vCards cause notifications)
* library and translation updates
* other improvements and bug fixes

Version 2.3

* notify on invalid iCalendar/vCard objects
* add app setting: Notification settings (only when notification channels are available)
* use default time-zone to store floating DATE-TIMEs
* exceptions of recurring events: use main event's DTSTART time zone for RECURRENCE-ID
* library updates
* minor improvements and bug fixes

Version 2.2.3.1

* fix crash in debug info on some older devices when OpenTasks is not installed

Version 2.2.3

* fix permissions/notification problem with OpenTasks
* maybe fix increased battery usage problem
* minor improvements and bug fixes

Version 2.2.2

* login: show error message when account name is already taken
* use dav4jvm instead of dav4android (internal rename)
* fix crash on single-core devices

Version 2.2.1

* hotfix for Android 4.4: fix app crash when logging is enabled
* ical4j update (using built-in EMAIL parameter and COLOR property)
* updated translations (including Farsi, thanks Taraneh Saei!)

Version 2.2

* greatly improved logging
* ask for contacts/calendar permissions as soon there is a known CalDAV/CardDAV service (fixes recurring permission notification)
* make sure the account is seen by OpenTasks
* retain sync intervals and isSyncable when renaming an account
* minor improvements and bug fixes

Version 2.1

* rename DAVdroid to DAVx⁵ for legal reasons
* remove "Accounts may be gone after rebooting" startup dialog
* replace AmbilWarna by ColorPicker
* refactor Settings provider
* library updates
* minor improvements and bug fixes
* add F-Droid metadata

Version 2.0.7

* settings: added some icons, re-arranged entries
* ignore HTTP 403 when the resource upload fails because of missing permissions (server will win)
* debug info: show details about DAVdroid, contact/calendar providers and contact/calendar/task apps
* minor improvements and bug fixes

Version 2.0.6:

* ignore non-successful multiget responses
* library updates (including okhttp 3.12)
* switch to AndroidX (from Android support library)
* minor improvements

Version 2.0.5

* explicitly compatible with Android 9
* minor bug fixes/improvements

Version 2.0.4

* resource detection: separate CalDAV/CardDAV detection
* resource detection: better handling of SocketTimeoutException