I worked on several USA based Mobile Applications.
Pavlok (Habit Breaking and Streaks App):
The Pavlok wristband is a behavioral changing device designed to help users break bad habits and form good ones. The Pavlok device uses a trio of stimuli (beep, vibration, and zap) to incorporate the latest technology (backed by 80+ years of scientific research) based on aversion therapy, to help users associate their bad habit with an unpleasant effect and drop it.
https://play.google.com/store/apps/details?id=com.pavlok.breakingbadhabits&hl=en&gl=US
Protectify (Sending Emergency Alerts):
Protectify sends an alert to your contacts & emergency responders with a single button, making it the most discrete alerting application available. With extensions for the apple watch and using our patented portable button, you can send off an alert without picking up your phone.
https://play.google.com/store/apps/details?id=com.protectify.app
ChangeUp:
ChangeUp is a comprehensive mobile and web-based solution for navigating between beneficial pitching repetitions and dangerous overuse, while at the same time building an evolving athlete profile based on in-depth analytics and historical data of each and every pitching session by that athlete. Designed to provide an easy-to-use tool to accurately and completely track an athlete’s pitch load across an unlimited number of teams and seasons, ChangeUp also provides real-time, in-game analytics regarding safety, durability, effectiveness, and other key performance metrics while also ensuring compliance with pitching restrictions and tracking of availability for upcoming games.