Simply go to the GIF Maker site while on mobile and add in a sequence of images from your camera roll, taken using your phone's lens or pasting in a URL. After that, you can caption your newly-created GIF, add stickers and glitter, and draw on them. While you won't find the creative image-altering effects on desktop, the biggest boon of the tool's mobile browser version is likely creating GIFs without needing to download and finagle an app.