FX Photo Studio (iPhone | iPad) lets you edit images on your iPhone, add multiple effects, then add stylized text for a unique look. The app includes all the basic image-editing controls such as brightness, contrast, and color balance, along with cropping and rotation tools.
But where FX Photo Studio shines is in the amount you can do with your photos by selecting from an enormous number of effects. As of this writing, FX Photo Studio includes 190 high-quality effects you can add to your images. You can also combine effects for virtually limitless combinations. But while the app features a ton of effects, it doesn't have a live preview like many other photo-editing apps. Instead you can look at the different effects, pick one, then the app will show you your photo with the effect. To help this somewhat slow process, you can cycle through effects when you're looking at your image using the arrows at the top. Still, it's not an ideal workflow.