When comparing 500px vs Ball O'Clock, the Slant community recommends Ball O'Clock for most people. In the question“What are the best custom Android Wear watch faces?” Ball O'Clock is ranked 48th while 500px is ranked 60th. The most important reason people chose Ball O'Clock is:
Colors can be customized as well as the battery indicator
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Pros
Pro Beautiful interface
Pro Has a free tier that allows selling photos
500px has a free tier that allows uploading 20 photos a week and earn money from them.
Pro Opportunity for exposure
Pro Commerce options
Pro Portfolio can be built without knowing code
Has a visual editor for non-coders and complete CSS, JavaScript and HTML access for coders.
Pro Customizable
Colors can be customized as well as the battery indicator
Pro Animations
The animations of balls dropping and rolling and the slides rotating makes it fun to watch
Pro New concept of telling time
The concept of telling time through ball stacking is a new concept for watchfaces that makes it unique