Letterbox: Open When Letters app analytics for September 13

Letterbox lets you send cute letter boxes to your friends and/or partner. You can customize letters by choosing their colors and fonts or by attaching an image. Use letterbox to make "Open When" letters for your loved ones. You can also pair with your partner to continue sending each other letters and getting more func couples features 3> Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/