wtf is kokoro-ios?

This project lets you add high-quality text-to-speech to iPhone and Mac apps. If you are building an iOS or macOS application and want it to read text out loud in a natural-sounding human voice, this library does the heavy lifting for you. It generates English speech faster than real-time, meaning it creates the audio quicker than it takes to play it back. Under the hood, it runs a machine learning model called Kokoro entirely on the device. The project translates written text into phonetic sounds, feeds those sounds through the model, and produces an audio buffer that your app can play. It relies on Apple's own machine learning framework, which means it is optimized to run efficiently on Apple hardware. According to the README, it can generate audio over three times faster than real-time on an iPhone 13 Pro once it has warmed up. App developers building accessibility features, audiobook readers, navigation tools, or any application that benefits from spoken output would use this. The main benefit is that the processing happens locally on the user's device, rather than sending text to a remote server. This means the speech generation works offline, avoids server costs, and keeps user data private. To actually use it, you need to download the large model file and voice styles separately and include them in your app. The repository points to a separate example project that shows exactly how to do this. The project also recently added the ability to generate timestamps for each spoken token, which is useful if you need to sync the generated audio with on-screen text or animations.