Casper

As you might have imagined already, the ability to save Snaps to your gallery is not really something that Snapchat had in mind, and it’s not a feature supported by the application. This is the reason why you won’t find Casper in the Google Play Store.
This is where Casper comes into play, with its ability not only to save snaps in a stealth way but also to send snaps from the gallery. Furthermore, with this app, it’s possible to forward a snap that you’ve received, and the media editor available by default allows users to tweak the photos with the help of filters.
A feature called Slide Filters allows advanced users to make their media feel a lot more professional. Also, Emoji and stickers are also integrated by default.