This app offers an easy to read Solunar fishing calendar, tide times and sun/moon information to plan your fishing trips. Note: This app wont catch the fish for you.
But if you know what you're doing, it will help you to find good times and days to increase your chances of catching fish. If there are no fish or you can't find the fish, then the bite times wont help you to catch anything either. Fishing is about location, timing, lure or bait presentation and a little luck. If you cannot catch fish during the predicted times, try a different location or different lures/bait. Use a fish finder to locate fish, etc.
To be successful at fishing you need to learn and apply many different skills. Knowing the best time to go fishing is only one of those many skills.