Open Snapchat and go to the camera screen
Tap the filter or lens you want to use
Press and hold on the lens preview
Tap Save to Camera Roll if the option appears
Take a photo or record a video with the filter applied
Save the snap to Memories
Open Memories and export the snap to your Camera Roll
Use the Share button to save the filtered snap to your device
For lenses, use the Lens Explorer and tap the bookmark or save icon if available
Check your device gallery or camera roll for the saved snap