An iOS language tutor that teaches through real conversation, not word tiles. Start a lesson on any topic. Connect ChatGPT, Claude, or Gemini with pay-as-you-go API billing. Pennies per lesson instead of a $14 monthly subscription.
I wanted to see how close I could get Claude to ~one-shot a typical startup while allowing for high-signal user input. I ended up with two Claude skills that handle the heavy lifting. Optimized for token efficiency, time (parallelization), surviving context flushes / session restarts.