Amazon Prime Download Limit
You can stream and download Amazon Prime titles by purchasing and renting videos, as well as subscribing Prime Video. If you want to download Prime videos, you need to first download Prime Video app for iOS, Android and Windows 10.
If you choose to purchase a video, there is no time limit. If you rent a video on Amazon or subscribe Prime Video, you must watch it within 48 hours after renting and downloading. Depending on your location, you can download a maximum of 15-25 video titles across all devices associated with one Amazon account., and free videos cannot be downloaded on Prime Video Mobile Edition.