It really depends on your personal needs and preferences. I recently discovered that iCardio ( https://play.google.com/store/apps/d...mp.icardio.app
) works on the gear and allows me to link data from my fitbit and my scosche rhythm pulse monitor. That may be way more advanced that what you're looking for though lol
What about runtastic? With the app on your phone and your gear, you really can't go wrong!
Galaxy Note 3 SM-N900W8 (Rogers Canada)
X-Note 11.0 Leonardo Edition