Inside the service
"animeflix download", "downloader", "how to download anime from animeflix" and "download naruto shippuden in english animeflix" are searched every month. The download lives on the service you open with Watch now: whole cours come down to a phone or tablet in HD, with the Japanese, English or Hindi track you chose, and stay for weeks. Press Watch now, open the service, use its download button. A program calling itself an AnimeFlix downloader is somebody else's software.
How much space
A twelve-episode cour is about six gigabytes in HD and two at 480p; an arc of fifty episodes of Naruto Shippūden is about twenty-five in HD, so download an arc at a time over Wi-Fi. The quality page has the numbers.
My List offline
The installed app opens without a connection and shows the list and the episode marks.