kou-works' profile on Product Hunt

About

I'm Kou, an indie iOS developer based in Japan, building under the brand kouworks. I focus on small, focused apps that solve real problems for creators and travelers — with a strong emphasis on privacy and on-device processing. Recent apps include RekiMap (a historical map app for travelers in Japan), ListenBack (an audio playback tool), and most recently VlogMask, a real-time face mosaic camera app for vloggers who film in public. I believe the best software comes from solving your own frustrations. Every app I ship is something I personally wanted to exist. Always happy to connect with fellow indie devs, creators, and anyone interested in privacy-first apps. → kou-works.jp → contact@kou-works.jp

Badges

Tastemaker

Gone streaking

Gone streaking 5

Maker History

VoiceKitRemove filler words from video — entirely on your iPhone
Aug 2026
KidsMaskKeep your child visible. Mosaic the rest.
Jul 2026
VlogMaskTap to protect your face. Mosaic everyone else.
Jun 2026

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Joined Product HuntJune 25th, 2026

Forums

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4h ago

VoiceKit - Remove filler words from video — entirely on your iPhone

VoiceKit cuts the "ums" and "uhs" out of your videos and audio, generates subtitles, and summarizes what was said — all on your iPhone. Nothing is uploaded, ever. Detection is automatic; you decide what gets cut. One-time purchase, no subscription.

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24d ago

KidsMask - Keep your child visible. Mosaic the rest.

Sharing videos of your child's birthday, sports game, or school event? Other kids appear in the frame. KidsMask solves this in one tap. Auto-detects faces, keeps YOUR child visible, mosaics the rest. Manual editing catches auto misses. 100% on-device — no cloud, no data collection. One-time $4.99 for Pro.

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2mo ago

VlogMask - Tap to protect your face. Mosaic everyone else.

VlogMask is an iOS camera app that mosaics every bystander's face in real time while you record. Tap your face to protect it — everyone else gets pixelated automatically. No post-editing. On-device processing only. Built for street vloggers, travel creators, and anyone who films in public.