I didn't want to upload my own material to a third party cloud service, use mobile data for voice synthesis and kept running out of podcast queue on flights, so I spent a while trying to get Kokoro running on my iPhone.LoudReader is what came out of it - an iOS app that reads essays, articles, and books aloud, fully on-device. No account, no network after install.The model running once reading a sentence was the easy part. Making it not feel like a demo was the rest: streaming synthesis so playback starts before the sentence finishes, porting misaki to swift because I could only find python releases, thermal monitoring and strategy was a tough one as well. Runs well on iPhone 14 Pro(what I have) and newer. Tested on my mom's iPhone 12 Pro and it chokes sometimes, so I ported KittenTTS as a lighter fallback for older devices. The whole project took around 2-3 months on the weekends with claude code and codex.Smooth TTS was the hard part but the app around it grew larger than I expected ...