Skype have updated the Windows Phone version for the Skype app to version 18.104.22.168. This version has faster message syncing, you can remove individual chat messages and photos or clear the whole chat history from your device. There is a new high contrast, dark mode. There is also improvements to groups and general bug fixes.
You should be able to find the updated app in the Windows Phone Store.
– Messages now sync faster than before.
– Tap the new recent icon or press the back button while in a chat to return to the recent list.
– Remove individual chat messages and photos or clear the whole chat history from your device.
– Improvements to groups – set group pictures and save groups as favorites.
– You can now turn on ‘high-contrast (dark)’ mode from Skype’s settings.
– General improvements and fixes.