Best apps compatible with Apple's Health app (pictures) 1 of 8. Track a variety of activities with Argus. ... 2 of 8. A quick, intense daily workout. ... 3 of 8. A humorous approach to fitness. ... 4 of 8. The ultimate calorie counter. ... 5 of 8. A surprisingly accurate heart rate tool. ... 6 of 8 Sarah Tew/CNET. ... 7 of 8. ... 8 of 8. Oct 13, 2014