Snapchat may be popular, but the company is struggling to make money through advertisements. It’s been searching for a new source of revenue for months, including additional photo lenses and sponsored photo lenses, but neither of those are big money makers either, and so the search continues. But whereas its previous monetization attempts have involved augmenting its existing service, Snapchat’s next attempt may be overhauling its service entirely. The developers of Snapprefs discovered some code references in the Snapchat APK on Monday that suggest that the company plans to implement audio and video calling features in the future, as well stickers for its chat, similar to what messaging apps like Facebook Messenger and WeChat support.