Flash is a free iPhone app developed by Flash App LLC that adds a new dimension to phone calls by allowing you to share pictures and videos with your friends through calls. With Flash, you can easily send pictures and videos to your friends whenever you call them, so they can see what you're up to in a flash. The app also lets you use your pictures as a caller ID, so your friends can see your latest picture as soon as you call.

One of the most interesting features of Flash is the ability to send "Hidden Flash" pictures and videos that are password-protected and delete themselves after a set period of time. This ensures that your private pictures and videos remain safe and secure. The app also comes with a built-in photo editor that lets you add captions, stickers, and unique effects to your pictures before sending them.

In addition to sending pictures and videos through calls, Flash also comes with a messenger app that allows you to send picture and video messages to your friends, add reactions to their Flashes, and keep the conversation going with group messaging and live chat. Overall, Flash is a great app for anyone looking to add a fun and exciting new dimension to their phone calls. Download Flash now and start sharing great pics and videos in a flash with every call!