Hey Product Hunt 👋 I built IRO because every coloring app I tried felt like it was made for kids — bright primaries, cartoon clutter, badges and streaks nagging me to come back. I wanted the opposite: somewhere to put my phone on Do Not Disturb and just... color. No pressure, no noise. So IRO leans grown-up. The line art is things adults actually love — tattoo flash, natural wine bars, champagne cellars, candlelit lounges — and every collection ships with hand-curated, muted palettes so you never stall on "what color goes here." Tap a region to fill it, or grab an Apple Pencil and paint freehand. When you're done, export in full resolution, watermark-free. It's the calm, slightly ASMR ritual I wanted at the end of a long day. Would genuinely love your feedback — what collections should I add next? 🎨

IRO – coloring app for adults

Calming coloring for stress relief 🎨

Calming coloring for stress relief 🎨