A free program for Android, by VELAN.

Pic Frame is a free photo editing app for Instagram and other social networks. With it, you can easily create a collage from your favorite photos and share it on your Instagram account.

You can add multiple photos and select an aspect ratio to create a square collage for Instagram or other social networks. It also has an image editor and a text editor, so you can change the background, add text, stickers, and more to the collage.

It has a simple and intuitive interface, which makes it very easy to use.