Run and edit programs on iOS devices. Input and execute commands like let, if-then-else, for-loops, and goto. Display simple line graphics. Use as a programmable calculator. Supports minimal language with dim, data, read, and restore commands.
Learn flag signals and their meanings with interactive quizzes and explanations. Practice Morse code and flag alphabets in multiple languages. Send and receive semaphore signals with visual guides for both sending and receiving.
Study for the U.S. citizenship exam with practice questions and answers. Review flashcards with star feature for later revision. Listen to audio versions of all questions and answers. Track progress with quiz mode and answer feedback.
