The layout of Aviary was more similar to the other photo editing apps I have used.
With Aviary, all of the editing tools are in one place at the bottom of the screen, unlike Line Camera, where the 'beauty' and 'design' tools are separated out. In Aviary, under the settings, you can rearrange the editing tools to list the ones you use most frequently first. By default, the "meme" feature is last but if you use memes frequently on your photos and don't want to have to keep scrolling right to find it, you can move it closer to the beginning.
The Line Camera app seems to have more options for enhancing faces on photos. Using the 'beauty' feature, you can do various things like remove blemishes, remove dark circles under eyes, and even alter the eye size or face shape to some degree.
Both applications allow you to add creativity to your photos by changing the style, background, or adding drawings or text. You can even download various sticker sets to put on your photos. Some of the stickers are free, some are available for a small fee.
Next, I tried the Color Splurge app. Color Splurge lets you alter the coloring on your photos. A color photo you take or upload is converted to a black and white version. You then color over certain areas to bring the color back. So you could have the background in black and white and the person in color for example. The challenge was trying to only select certain areas to be colored. When I tried it, I ended up coloring areas I did not intend to. You can also alter the color of certain areas so that the color of someone's shirt is changed from red to blue, for example. Once again, it was difficult to select just the area I wanted without coloring something else.
The CamMe app looked promising but it is for Apple devices only so I wasn't able to try it out. From what I read about it, you stand several feet away from the phone and by waving, you tell the app that you are ready to pose for a picture. I looked for similar apps that would work with Android phones. The closest thing I've found so far was Selfie Camera app. There is no waving with this one. The only difference between this app and a standard cell phone camera is that it defaults to front camera rather than back camera so it's immediately ready to take a picture of yourself. You still have the awkwardness of holding the phone back from your face and pushing the button. As a result, I don't think you would get as good of a picture as you would with CamMe.