My Fitness Pal what ^^^^^^they^^^^^said. LOVE the barcode scanner and exercise tracker.
Mapmyrun (which can be used for running, walking, biking - has a GPs that tells you how far and fast you went...LOVE this app).
Cozi just because it has a section for me to enter my weeks' meals and create shopping lists and keep the family's calendar. I feel more organized which translates into staying on target with my eating and exercising.