You could open any file with .ai extension or Adobe Illustrator file.
Any ai file in your phone storage will be open by this app only by click in that file.
For Android 7.0 and plus some file needs to be open from inside this app to be able to share them.
For search folder preference , it is set to download folder, if you need to change it just go the app settings and search folder.
Please Don't make your root storage your default search folder as it may take a lot of time to finish the search, and if you have a lot of ai files in your phone ,please split them into two folders for the app to work well.
if you are in android 6.0+, give it a storage permission then click any Ai file to view by this app.
Zooming is amazing with this app, you could see every detail in your image by zoom.
Please contact me for any issue to fix it with my contact info in the app settings before give me any bad ratings.
Thanks a lot.