Possible Clues:

• App with Reels
• App for pix
• 13-Down app for sharing pics
• Social media app with video "Reels," familiarly
• App with 'Stories,' informally
• App with filters, for short
• App with photo dumps, for short
• Place to share stories, for short
• App with stories and reels, briefly
• Lead-in to "gram" in social media