▶ play Solo founder · builder · maker of too many things

SORA KALDEN

I build apps and businesses, write worlds, run games, and learn hard things in 30-day sprints — and I'm looking for talented, curious people to make the next ones with.

Builder / writer / maker of too many things

Here are a few of mine. Tune through the channels, and let's build the next one together.

CH01 The Maker · current work

Building

~160 ideas and counting — and the ones that ship. Find the right thing to build, then build the honest version.

● live tape 01 · lead

Flua

The fastest honest path to a new language: one expertly-ordered deck, real native audio, and spaced repetition that does the thinking for you. He taught himself Japanese to A1 in ~20 focused hours with the method, then spent a year building the app that strips out every ounce of the friction that makes people quit.

See Flua → tryflua.com

Flua's expertly-ordered language deck, a clean study sheet view

A Flua flashcard with native audio and spaced repetition

tape 02

Weave

A minimalist weight-and-habit tracker built so the graph does the nagging. His mom lost 17 lbs with it.

tape 03

Super Zen

A focus / calm tool — the small, well-made kind of app he likes to ship.

tape 04 · b-roll

Small tools

A metronome that actually feels good; a tool to find the episode where a show finally gets good. Small, sharp, shipped.

tape 05 · the idea engine

The idea engine

~160 catalogued app, game, business, book and product ideas — each ranked, named and MVP-scoped, roughly 28 of them games — and a habit of turning the best ones into real, shipped things. The invitation is open: grab one off the shelf and build it with me.

More apps → kalden.me

CH02 The breadth · eight sub-channels

The Eight Sides

Eight bands on one tape. The domains change; the method underneath doesn't. Tune a sub-channel.

01 The Maker

The Maker

Apps, ~160 ideas, and the one move underneath all of them: find the right thing to build, then build the honest version. The domains change; the method doesn't.

It's the same engine he points at everything else on this tape — a language app, a body, a syllabus, a song. Build the shortest honest path; let the work argue for itself.

The domains change. The method doesn't.— from the notes

02 Worlds & Stories

Worlds & Stories

He's built worlds since he was 11 — a fantasy novel he faked his way into finishing and published at 14, a 150k-word dark epic in progress (The Swords of Darkness), a homebrew D&D world with its own playbook, and a manga he still wants to make.

Because I had to fake progress, I accidentally built a real habit. It makes me wonder how many things we could actually finish if we just tricked ourselves into starting.— on the teen novel

03 Learning & Teaching

Learning & Teaching

How he learns anything fast, and why he's building the courses he wishes someone had taught him — math, statistical and computational thinking, built for real understanding instead of the exam.

The 30-day sprint: pick a skill, go all-in for 30 days. Japanese to A1 in ~20 focused hours. Tone-deaf to singing from memory in a month. Badminton, YouTube, shipping. The trick isn't grinding harder — it's refusing to start until he's found where the common advice is wrong, then building the shortest honest path and letting sleep do the heavy lifting.

Being called smart my whole childhood made it part of my identity — and I was more afraid to lose that title than I was to fail a class.— About Me

04 Games & the Table

Games & the Table

Take a system apart, find the fun, build it back better — a Balatro-inspired dice roguelike in design, a board game in progress, and D&D run as systems.

Any time the best strategy isn't the most fun strategy is, I believe, a failure of the game's design.— from my consumables essay

b-roll · hand-built maps

A homebrew D&D world with its own playbook — and maps drawn by hand.

05 The Modern Bard

The Modern Bard

Singing, standup, improv, voice acting, speaking — the half of himself he rebuilt on purpose, charisma treated as a built skill.

I could not sing. I could not dress well. I was not particularly fit or especially charismatic. I was a very well-compensated specialist with a B-minus in everything else.— how I became superhuman in 2 years

06 Photography & the eye

Photography & the eye

One camera, a single 23mm prime, golden hour. He shoots portraits, fits, and the cities he lives in — and it's the visual half of the same brain that obsesses over color grading and type.

The whole reel behind this broadcast is his.

You can't study the color wheel for two hours and understand it. You have to train your eye over a long time.— on color

07 The Athlete

The Athlete

The same engine he points at apps, pointed at his own body — and the sports (soccer, badminton, volleyball) that are how he makes friends in a new city.

Prioritize control and intention over speed.— his own soccer training notes

08 The Mind

The Mind

A reading life run like a syllabus — philosophy, history, business — all read through one lens: read to build, not to collect.

Everything is interconnected. Singing makes you a better speaker; games train you to perform under pressure. Each skill feeds the next. If you want to be truly unstoppable, learn everything.— from the notes

CH03 Things I haven't built yet

Static / Unrecorded

Five frames that never fully lock — on purpose. The tape hasn't been recorded yet.

UNREC 01

Write a TV show — he's watched thousands of hours of film and anime, only the best, mostly to take apart why they work.

UNREC 02

Finish the manga — the "next Death Note or Game of Thrones": a complex plot that's somehow easy to follow.

UNREC 03

Make Westworld real, as a game you can actually live inside.

UNREC 04

Open a café that's a third place for serious makers — writers, artists, builders, one room.

UNREC 05

Find the talented, curious people he'd do all of the above with.

— dead air · the quiet line — And some things I do purely for myself — painting like no one will ever see it, building and painting Gundam kits, singing in the mornings, the occasional cosplay. No goal. Just the doing.

CH04 The reel

Gallery

Portraits, fits, and the cities I've lived in — Osaka, Tokyo, Kōyasan, Budapest, Lisbon, Nagpur. One camera, a single prime, natural light, graded by hand.

CH05 Distinct from the work — ideas, not portfolio

Transmissions

Five essays, recorded off the main reel.

TX-1

How I Learn Anything in 30 Days

Not willpower — a method: find where the common advice is wrong, build a feedback loop, and let sleep do the heavy lifting.

TX-2

The year I walked away from $250k

At my financial peak I was lonelier than I'd ever been — so I quit, lost almost everything, and spent a year figuring out what a life is for.

TX-3

What Actually Makes D&D Peak

After 100+ hours behind the screen, the magic isn't the dice or the lore — it's a handful of frameworks for a world that's already moving when players walk in.

TX-4

Why the best schools taught me to forget

I optimized for the grade at every school I attended, and it worked — which is exactly the problem.

TX-5

I Used My CS Degree to Debug My Weight Loss

I'd done everything right for six months and the scale wouldn't move — until I stopped treating it like willpower and started treating it like a bug.

TX Let's build something

I'm looking for people who are excellent at something and curious about everything.

Collaborators, co-conspirators, friends. If any of these worlds is also yours — or you just want to scheme — say hi. The best things in my life started as a five-hour first conversation with a stranger.

✉ Say hi See Flua → My apps →