Indie apps & digital design

Hi! I am Jarl

Yes, just scroll down

I do creativeprojects

Sometimes I do itfor money

I'm a full stack digital designer and developer based in Denmark, with 15+ years behind me across design strategy, UX/UI, interaction design and creative coding. I build the things I want to exist: native iOS and macOS apps, web apps, and small open-source tools.

My day job is large, complex digital projects for organisations like Carlsberg, Danske Bank, Native Instruments, DSB and Roskilde Festival: strategy, research, design systems, the slow and difficult parts. The rest of the time I build my own products, which is where I take something from idea to App Store without a single handoff. The two feed each other.

What I do

Core disciplines covering strategy, design, code, and creative experimentation

Digital Strategy

I figure out what users actually need (not what they say they need), what the market wants, and how to make stakeholders happy. Then I make a plan that doesn't suck.

Creative coding

I write code to create art. Generative designs, interactive experiences, weird experiments. Sometimes it's useful, sometimes it's just cool. Both are valid.

Concept development

I take wild ideas and turn them into something real. I explore, break things, refine, and push boundaries until it's actually good. Sometimes it works, sometimes it doesn't. That's the fun part.

AI-native building

I build with AI, not just around it. Prototypes in hours instead of weeks, models running locally when the data shouldn't leave the machine, and interfaces that make AI behaviour feel like a product instead of a chatbot in a box. The tools change every month. Knowing when to reach for them doesn't.

Digital design

I design digital experiences. UX flows, UI components, micro-interactions, motion design - I make interfaces that feel good to use. Design systems, component libraries, and that perfect easing curve for a hover state.

Weapons of choice

And always seeking new ones

Design & creative

Native apps

Web & ship

AI-native

Things I've shipped

My own products, built alongside the day job. All of them live.

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Running From Horses

An independent record label website showcasing releases, artists, and the vibrant world of independent music.

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BeerTuner

Ever wondered how many beers it takes before a song becomes a masterpiece? Rate songs based on how many beers (or drinks) you think they need to sound their best.

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Made by Human

A positive movement celebrating human creativity and the meaningful choices we make in our creative work, with free badges for projects.

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It's mono, yo!

An elegant macOS app to convert WAV files to mono while preserving sample rates. Perfect for hardware samplers.

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TrimrPix

Modern image optimization for macOS. Optimize JPEG, PNG, GIF, WebP, and AVIF with intelligent compression and batch processing.

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Nostromo UI

A comprehensive UI library built with React, TypeScript and Tailwind CSS. Features powerful theming, dark mode, accessibility, and a collection of ready-to-use components.

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WODrounds

A minimal EMOM and interval timer for CrossFit, HIIT, and Tabata. Runs natively on iPhone, iPad, Apple Watch, Mac, and Apple TV. No accounts or subscriptions.

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Wean Nicotine

A free iOS app that helps you gradually reduce snus and nicotine pouch consumption through daily tracking, a declining allowance system, and supportive tools.

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Get to the Movie!

An Arnold Schwarzenegger movie recommendation quiz that suggests the perfect film based on your mood and preferences.

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Emotionwave

Visualizes global sentiment in real-time by analyzing live news data and displaying it through dynamic visuals and ambient soundscapes.

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Anvil Workout

An iPhone app for strength training. Plan workouts, track sets and reps in real time, and monitor progress with charts and personal records. One-time purchase, fully offline, no accounts or ads.

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Little Rocket

A tiny browser game built with Three.js. Fly a rocket through procedurally placed planets while a slow, melancholy story unfolds. No score, no fail state. Just the long dark.

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TrimrPix for iOS

Compress photos on iPhone without duplicates. Shrink JPEGs and HEICs in place, keep your library tidy, and reclaim storage without flooding Photos with copies.

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Walkful

A calm, private step and walking tracker for iPhone. Turns your daily walks into something meaningful. No accounts, no cloud, entirely on your phone.

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BotLens

A free, open-source Chrome extension that shows how LLMs, crawlers, and bots see any page. Checks robots.txt, structured data, semantics, and JS-hidden content, with an actionable AI readability score.

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PageLens

A Chrome extension that estimates the carbon footprint of any web page. Turns digital emissions into an A-F Eco Score with concrete ways to make the page lighter. Powered by CO2.js and The Green Web Foundation.

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It's 404, yo!

A tiny native macOS app that batch-converts sample packs into the exact format the Roland SP-404 MkII accepts, killing the cryptic "Unsupported File" error. No DAW, no Terminal, samples never leave your Mac.

Apps on the App Store

I also make native apps

Everything I've shipped for iPhone, iPad, Mac, Apple Watch and Apple TV, gathered in one place.

View my apps on theApp Store

Previous clients

Companies and organizations I've worked with on digital design and development over the years

Carlsberg
Danske Bank
Københavns Universitet
Native Instruments
Psykiatrifonden
Roskilde Festival
TDC
YouSee
Rockwool
DSB
Skattestyrelsen
3
MobilePay
ATP
Forsvaret
Output
BMS
SUS
Xellia Pharmaceuticals
Novozymes
LEO Pharma
Tryg
Metroselskabet
Roche
Your logo
here?

Who you gonna call

Here is how you can reach me

I'm always up for solving new digital challenges and I take my coffee with a little bit of milk.