Remove ads purchased within a mobile app (In-app purchase) will only remove ads within each app.
On the other hand, the subscription-based Send Anywhere PLUS plan will remove all ads across Send Anywhere service - any platform you use.
Also, Send Anywhere PLUS is a file transfer faster than Send Anywhere. You can experience best file transfer not only Ad-free on all platform but also powerful premium features such as creating my links with no expiration date, downloads tracking, Max 50GB file upload size, and so on! The new features of SendAnywhere PLUS are constantly updated.