On January 23rd, 2017 most iOS users were able to update their Snapchat app to see the Bitmojis of all their friends. Unfortunately, there are some older model iPhone users that are not able to update and see this new Snapchat. If you are using an iPhone 4, 4s or 5 there is a good chance you cannot update to the latest version of Snapchat. Also, if you are using an older iPod or iPad you may not be able to update.
Please comment below with the model iPhone, iPod or iPad you are using and the operating system so we can verify which devices can update and which cannot.