File transfer between Android, iOS, Linux, macOS, and Windows
Wifi & BLE driven passenger flow metering with cheap ESP32 boards
Command-line calculator for Maidenhead- (QTH-, QRA-) Locators.
Tracks IOS, Android, Windows, and Java Me/J2ME cell phones
Emails AT&T, Sprint, or Verizon Cell Phone Usage stats
File transfers between some old Nokia phones and Linux via BlueTooth