Click here to download a PDF version of this application. This app can be used for Achilles tendinitis. AT is tendinitis of the Achilles tendon, generally precipitated by overuse of the affected limb and is more common among athletes training under less than ideal conditions. Simply move the app over the area where you feel the most pain. These directions may be different than the video; feel free to experiment. If you’re still not getting relief we recommend you contact one of our Rock Docs for medical consultation.