I design and build native apps for Mac, Windows and iOS.
A macOS and Windows app for English learners. While you watch a film or a series, one hotkey finds the word you do not know in the subtitle, defines it in context, and saves it to your treasury to review later, or mirrors it into your Anki deck.
An RSVP speed reader for iOS. Pera streams your books one word at a time so reading stops depending on how fast your eyes scan a line.