There are many apps that are good for making collages, including Canva, Layout from Instagram, Adobe Spark, and Unfold. These apps offer a variety of layouts, templates, and effects to create stunning collages.
The number of images you can use in a collage on Instagram depends on the method you choose. The Instagram app allows you to use up to 10 images in a post. Depending on the provider, you can use different numbers of images when using apps or templates.
After you share your collage on Instagram, you cannot edit it directly. However, you can edit the original image or images and recreate the collage to share an updated version.