I found an app on Google Play... It is a "card counter" that will connect with a smartwatch. The app has a "stealth" mode but you can still tap the screen for counting. The count shows up on the smartwatch... The smartwatch even vibrates once the count reaches favorable. It also can link to something called a Puck-JS which is a bluetooth enabled button where different presses of that button increase the count, decrease the count, and clear the count (for a new shoe). That Puck-JS is pretty small and could be operated by my toes! :-)
https://play.google.com/store/apps/details?id=com.planetexpresssolutions.cardcount
It's not free though... But pretty cheap when you consider what it could do for you.
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