Ageon vs Whoop, Oura and Apple Health Age

Whoop and Oura need a wearable and a membership. Apple's Health Age needs an Apple Watch. Ageon starts with an iPhone and three quick tests. Here's where each one is the better pick.

• Ageon vs WhoopWhoop Age needs a band and a Peak membership from $239 a year. Ageon estimates your age from quick tests and Apple Health on your iPhone. An honest comparison.
• Ageon vs OuraOura needs a ring from $349 plus $69.99 a year for its health features. Ageon estimates your age from tests and Apple Health on your iPhone. How they compare.
• Ageon vs Apple Health AgeApple's Health Age needs an Apple Watch and starts in US English. Ageon works on any iPhone, with or without a Watch, and shows its method. How they compare.