Pet Master Free Using this app is a lot easier and more efficient than trying to keep track of all your dog's physical paperwork by yourself. I especially like the appointment book and the medication-tracking function, which is invaluable if you have a dog on multiple meds (or multiple dogs on meds).

PetTech PetSaver In a medical emergency, you might not always have immediate access to a vet. PetTech PetSaver provides an impressive amount of basic dog health information, including good on-the-spot information like first aid procedures and a poison directory. I also really like the function that helps you find emergency care options in your area.

Poisonous Dog Food Speaking of health, when you're out on a walk and your dog scarfs something up, or when you leave her in the kitchen and she gets into the trash, the first thing you want to know (other than "Why would you EAT that?") is if she's consumed something toxic. Poisonous Dog Food is a quick, handy guide to a lot of common food--and non-food--items that dogs can get into. Especially if you have a vacuum-cleaner Labrador, it's a must-have.

Dog Diet Calculator Even when there's no poison involved, sometimes people unknowingly feed their dogs unhealthy meals. Dog Diet Calculator gives you an idea, based on breed and size, of how much and what your dog should be eating. It also has a huge database of different food types and brands, to help you navigate the increasingly complicated world of dog cuisine.

Dog Trivia Because if you have a dog and you're not enjoying yourself, you're probably doing it wrong.