Kateryna Ovsiienko

Learn Calligraphy with Augmented Reality — AR experience that help to learn Calligraphy!

Subtly — Learn English with smart subtitles on movies and TV shows

Daily — A personal URL for all your video calls

The Four — The hidden DNA of Amazon, Apple, Facebook, and Google

Fidget Spinner — The most relaxing spinner is here!

Product Leadership: How Top Product Managers Launch Awesome Products and Build Successful Teams — "If you build products, you need this book."

TypeTail — Interactive storytelling with your friends

Optimity: Live.Work.Play — Get rewarded for your healthy habits