How I Built a Private, On-Device Speech-to-Text App with Whisper

Most transcription apps upload your audio to a server to process it. If you are recording anything sensitive, a doctor’s visit, an interview, a private voice note, a business call, that is a hard no. So I built Private Transcribe: speech-to-text powered by Whisper, running entirely on your device. Your audio never leaves your phone. “Your voice, your privacy.” Here is how it came together, and why the privacy promise shaped every technical decision. ...

Building Capybara Crossing: What Shipping a Casual Arcade Game Taught Me

After a run of utility apps, I wanted to build something that was pure fun, something my niece could pick up in two seconds without a tutorial. The “hop across endless lanes of traffic” formula is a classic for a reason, so I put a capybara in it and made Capybara Crossing: hop across roads, train tracks, and rivers, collect coins, and try not to die. “Hop to survive.” Here is what building it taught me, because a casual game is a very different discipline from a tool. ...

How I Built an AI Chat App That Runs Entirely On Your Phone

Every mainstream AI chat app sends your conversations to someone’s server. I wanted the opposite: an app where the model runs on your phone, your messages never leave the device, and there is no login and no subscription. That became Personal LLM, and getting a language model to run well on a phone turned out to be the most interesting engineering problem I have taken on as a solo builder. ...

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