What are some alternatives?
When comparing flpbk.io and Automatic GIF Creator, you can also consider the following products
GifBook - Make animated GIFs into paper flip books
Tall Tweets for Google Slides - Tweet your Google Slides as animated GIF images
Print A Gif - Turn any gif into a printable flip book
Gifs - Search through a library of hundreds of GIFs that you can send in your messages or that you can share to social media pages.
simplebooklet - Code free web brochures. Publish, post, pin, tweet, embed, email, print and share everywhere.
Instagfy - Make a GIF with your most popular photos on Instagram