If you go for the first option, you can use different drawing tools to create your stickers. Simply adjust the size of the brush, choose the color you want, and then let your imagination go wild. Once you're done, the sticker gets stored in your custom pack.
The second and third options let you easily choose the part of the image or photo you want to use for your sticker. You can also draw on the image or add text. You can even correct the colors by adjusting the brightness and saturation, etc.
LINE Creators Studio is a very interesting app for regular LINE users, thanks to which you can create your own sticker packs in a matter of seconds. And obviously once they're created, you can also share them with your friends.
Requires Android 4.1 or higher