The answer to this question is Instagram. Instagram was released in October of 2010 and was available solely on iOS devices at the time. Snapchat, on the other hand, wasn't released until September of 2011. Snapchat's original purpose was to send self-deleting photos, while Instagram was created primarily as a photo-sharing platform. Since then, both platforms have evolved and now offer many of the same features, such as stories, private messaging and custom filters.