The Donky network supports everything! You can attach any Internet Media Type to an App Chat campaign and equally, your users can send you any type of file. Attachments are added to campaigns at the “Compose Message” stage.
MIME types or Internet Media Types are means by which file types can be identified as they are sent across the internet.
A full list of MIME types can be found here, along with some more information.
How can you use attachments?
Travel companies could send PDFs of airline tickets to customers booking through the app.
Retailers can request users send in images or videos of their favourite outfits for a competition
Financial institutions could attach terms and conditions of newly purchased products to their App Chat messages.
Essentially this means you can include any kind of audio, video, image or document file, as well as many other types.