How To Use 4D+ App? STEP 1STEP 2STEP 3STEP 4STEP 5 Order the 4D+ Cards through our website, and we will ship it to you! Download 4D+ App from the App Store or Google Play for free. Open the 4D+ App. Place the card facing to the camera and it will automatically scan the image. VOILA! Enjoy the most engaging multimedia from Octagon 4D+.