You may get animated GIFs for free from a number of websites. Here are the most popular Apps to get animated gifs:
Giphy: A huge collection of animated GIFs covering a range of topics.
Tenor: A large library of GIFs that frequently utilized in messaging applications.
Imgur: Provides user-generated content and a selection of GIFs.
Reddit: You can find fresh and trending GIFs by browsing subreddits like r/gifs.