Fresh Comics tells you about the latest issues every week and where to get them. It includes a full database of the week's upcoming releases and a comic shop locator that helps you find the best stores in your local area to purchase them. In addition to a full Android app, Fresh Comics also provides a home screen desktop widget that helps you keep up with your favorite issues every week.
Best of all, this app is completely free with absolutely no ads!
Note for new users: On this app's first run, it will download the last two week's worth of new comic book releases. This data consists of approx. 300 text records, 300 cover preview thumbnails, and 300 full quality cover images (about 25 MB total). If your wireless bandwidth is a concern, download and run this app first when you have a WiFi connection. After the first download, the app will update its record database weekly with approx. 150 new issues each weekend. These subsequent content fetches will be half the size of the initial download (12-15 MB per week).