Dave

Indie dev
Building mobile apps • shipping after work • learning in public

[Dave @davidcafor]

Hue9 started as:

“What if Sudoku worked with colors instead of numbers?”

Now the app is suddenly going crazy.

The last 28 days have been the biggest growth spike since launch 🚀

Indie reminder:
boring markets are often hiding massive opportunities.

[Dave @davidcafor]

@NSSpain @krzyzanowskim I need to be there this year...

[Dave @davidcafor]

My brain won’t stop lately.

Hue9’s next big update will bring color-blind mode, offline pause, Theme Lab, custom palettes, alternate icons, and cleaner settings.

And I’m already thinking about what’s next:

VS Mode via Game Center.

Same board. Challenge a friend. Watch their progress. Fastest color-sudoku solver wins.

Would you play it?

[Dave @davidcafor]

@egorkabantsov You got it!

[Dave @davidcafor]

Didn’t even realize I passed 4k on X.

Thanks to every single person following the indie dev journey.

5k next

[Dave @davidcafor]

@framara Aunque seas la competencia, si necesitas ayuda aquí me tienes 😉

[Dave @davidcafor]

@xtianp87

[Dave @davidcafor]

@xtianp87 me falta por ahí un sudoku para los momentos de relax 🙈

[Dave @davidcafor]

I’ve spent the last 4 days adapting Hue9, a color-based Sudoku, to be genuinely playable for colorblind users.

The easy fix would have been “add a colorblind palette”. But that still relies on color as the main API.

So I reworked the system around non-color cues: each value can be represented by a distinct symbol, pencil marks scale responsively, selected cells / related cells / hints have their own visual states, and the board keeps a clear hierarchy without depending on hue.

It was not a small UI tweak. It was a full pass on how the game communicates information.

Hard work, but absolutely worth it.

[Dave @davidcafor]

@JorgeCastilloPr Facts. The only problem is that's playing on hard mode.

[Dave @davidcafor]

@seraleev Massive milestone, Viktor! Congrats!
Your journey is such an inspiration. I’m sitting around $2K after 3 months with one app, and seeing this makes me want to push even harder. Hopefully I'll hit those kinds of numbers one day!

[Dave @davidcafor]

@seanallen_dev @BitrigApp Congrats on the new role! Our loss is Bitrig’s gain.
The community will definitely miss your courses, but I know you’re going to do amazing things over there. Crush it!

[Dave @davidcafor]

@frboulais @drylendar What a milestone, François. Congratulations.

[Dave @davidcafor]

@framara Nada… con un 3% solucionamos esa inspiración jajaja.
Ya avisarás cuando lances, seguro que lo petas!

[Dave @davidcafor]

I’ve spent the last 4 days adapting Hue9, a color-based Sudoku, to be genuinely playable for colorblind users.

The easy fix would have been “add a colorblind palette”. But that still relies on color as the main API.

So I reworked the system around non-color cues: each value can be represented by a distinct symbol, pencil marks scale responsively, selected cells / related cells / hints have their own visual states, and the board keeps a clear hierarchy without depending on hue.

It was not a small UI tweak. It was a full pass on how the game communicates information.

Hard work, but absolutely worth it.

[Dave @davidcafor]

@ChenteGallagher @RCDeportivo Que ansia por el sablazo

[Dave @davidcafor]

@ChenteGallagher @RCDeportivo esto no es mas en julio-agosto???

[Dave @davidcafor]

@indyfromoz LOL

[Dave @davidcafor]

If you told me a year ago that making a Sudoku game based on colors would be funding my tech cravings, I would’ve laughed.

Month 1 of Hue9: Paid for my Apple Dev Program renewal.
Month 3: Just paid for the upcoming iPhone 18 Pro Max.

Next goal: Studio Display.

Never underestimate a simple idea executed with passion. Thank you all!

[Dave @davidcafor]

@emin_builds Couldn’t agree more.

[Dave @davidcafor]

@AdamRichic 给你链接：https://t.co/3rqQcYr4fl
坐等你的体验心得！我觉得你绝对是中国第一个玩到这款游戏的人。要是觉得好玩，记得安利给身边的朋友们哦！

[Dave @davidcafor]

@AdamRichic 当然可以！Hue9不仅支持德语、英语、西班牙语、法语和日语，现在也已经完全支持简体中文了。