Juan Pablo Castro's profile on Product Hunt

About

I'm a software developer from Spain who likes building small, focused tools that respect your privacy and run on your own machine. Right now I'm working on ChacharApp: a free, open-source voice dictation app for macOS. Hold a key, speak, and your words are pasted into any app — all processed locally on the Apple Neural Engine, so nothing leaves your Mac. It started as my own itch after I hit the paywall on a paid dictation tool, and became something I want anyone to use for free. I care about local-first, private-by-default software, low latency, and speech tech that works for non-native English speakers and people who mix languages while they talk. Happy to chat about macOS development, on-device AI / Whisper, or indie building — feel free to reach out.

Badges

Tastemaker

Gone streaking

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Maker History

ChacharAppLike Wispr Flow, but free, private and 100% on-device
Jul 2026

🎉

Joined Product HuntJuly 3rd, 2026

Forums

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1mo ago

ChacharApp - Like Wispr Flow, but free, private and 100% on-device

ChacharApp is a free, open-source voice dictation app for macOS — a private, on-device alternative to Wispr Flow. Hold a key, speak, and your words appear in any app. Everything runs locally on the Apple Neural Engine (in every Mac since the M1, 2020), so your voice and conversations never leave your device: no cloud, no tracking, no accounts, no weekly limits. With no network round-trip it stays fast, and you can enrich it with your own custom vocabulary — jargon, names, technical terms.

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2mo ago

How do you promote your product without sounding too salesy?

I've always struggled with promoting my own work. It always felt a little awkward because I grew up in an environment where drawing attention to yourself wasn't really encouraged.

That's not exactly ideal when you're trying to build a business, and even less so when marketing is literally how you make a living. :D