A complete guide to making and publishing an iOS 10 sticker app

For artists, illustrators, creators, or anyone without app creation experience

1. Create your sticker images. These are the image dimensions that Apple recommends:

Small: 100 x 100 pt @3x scale (300 x 300 pixel image)

Medium: 136 x 136 pt @3x scale (378 x 378 pixel image)

Large: 206 x 206 pt @3x scale (618 x 618 pixel image)

For optimal results, just stick to one of these. Also, keep your file sizes to 500KB or less. Save them as a PNG or JPEG for static stickers, and GIF or APNG for animated stickers.
If you don’t know whether to pick PNG or JPEG, just ask yourself, “does my sticker have any transparent areas?” If the answer is yes, use a PNG.

For example, if your sticker background is not colored in, use a PNG.

2. Compress the size of your sticker files. I suggest:

• PNG compressor
• JPEG compressor
• GIF compressor

This step is optional, but I recommend doing this because users short on storage space on their phones will appreciate this.