Hi. The link to the app is consistent, but if you have a link to a report of the app, then it depends on the report. If you remove the report it won't find the URL.
Check the URL, it contains a "app/[appid]" for you to capture just for the app.
When you are uploading or creating the app it will also show you the link users can save in order to keep it working always:
Yes the can bookmark that url. Just copy the url and add it to bookmarks, but be carfull when viewing a report because the url is for the report and not for the app.
I hope that helps,
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Happy to help!