Spyglass is an unofficial completely free handy companion app for use with Sea of Thieves.
With Spyglass you can automatically detect any digging islands that you have on the radial menu of missions in a very quick way, making use of the camera of your mobile device.
When detection completes, you can view more details tapping on the detected isle.
Who not became stuck finding some islands sometimes! With Spyglass you can upgrade your pirate to the 21st century technology. You need to prepare some meat, or maybe visit the Ferryman after a snake bite? Check the detailed information of the isles that you have on you, and quick check what animal these islands have!

Disclaimer: Spyglass is an unofficial application, is not partnered with Rare or Sea of Thieves and doesn't have any relation with the respective and named registered trademarks of Microsoft.