Master the international radio alphabet — Alfa, Bravo, Charlie — used so letters can never be misheard. Spell words out loud, test yourself letter by letter, and see the pronunciation table. Runs entirely on your device.

Where you'll hear it: aviation (planes, air traffic control), shipping, emergency services and radio call signs. Say your postcode as “Tango Foxtrot One Two” and nobody mishears it. Note the official spellings Alfa (not Alpha) and Juliett (not Juliet).