A free app for Android, by Redberry LLC.
FeedYou is a very simple app that allows you to create your own list of recommended foods for your child's age. All you need is to install the app, enter the child's age, and a list of foods will be generated for you. It is very easy to use, and the app is very comprehensive.
The app also allows you to create notes for foods that you introduce to your child. You can even make use of the app to track the complementary foods given to multiple kids.