Collage Maker is a free application which can be really helpful when you want to create neat collages by mixing multiple pictures into a single big one. In fact, you are allowed to add up to 18 photos and to pick from a variety of framers and grids. As soon as the app is launched, you can choose one of the available templates and start from there.
Moreover, you will also find a feature that can be used to create fun memes. Just like other photo-editing apps out there, this one lets you apply various filters over your photos to make them look a bit different than the original form. Moreover, when creating collages, you are allowed to set a custom photo grid size, change the background, insert stickers, and so on.
After you're done editing, you can save the project on your device's storage and even share it with others through Instagram, Facebook, etc.