SeaTempMap01 / 04 ↗
Web · iOS · Android
The ocean,
at a glance.
Live sea temperatures. Anywhere on Earth.
15 languages1 km resolutionExplore ↗
Based in Slovakiafen0m✳
[
I design and ship apps for everyday life. From the first idea to the last detail. Web, iOS & Android. Built independently.
]Ideas → interfaces → everyday life↓
Selected work
Independent by design. / 01—04The ocean,
Calc²02 / 04 ↗
iOS · watchOS · Android
Less friction.
More precision.
Big square keys. No missed taps.
30 languagesOne shared engineExplore ↗
Bell Hours03 / 04 ↗
Web · Market calendars
Every market.
Every bell.
Know when the world is trading.
5 marketsYour time zoneExplore ↗
Phone Drops04 / 04 ↗
Web · Release calendar
Good timing.
Better phones.
Your next upgrade, in perspective.
16 languagesConfirmed datesExplore ↗
Four projects. One maker.01 / 04Scroll to explore ↓
[ Behind the work ]01 / About
ONE MAKER.
A LOT OF
CURIOSITY.
I'm fen0m. I turn things I wish existed into products you can actually use.
Design, code, data, native apps and all the details in between. From Slovakia, for anywhere.
More about my work +
fen0m is the label under which I publish my apps and websites. I work alone and take each product from the first sketch to the store listing: product design, front end, native mobile ports, the back-end data pipelines, localisation, search optimisation and the release process on the App Store and Google Play.
My main project is SeaTempMap, a live sea-surface-temperature map that turns satellite and ocean-model data into a number a traveller can read in a second. It runs as a website with 175+ curated destination pages in 15 languages, plus native iOS and Android apps with home-screen widgets, a free embeddable widget and a WordPress plugin.
The second one is Calc², a calculator built around one idea: large square keys with no gaps, so a calculation that matters never fails on a missed tap. It ships on iPhone, iPad, Apple Watch and Android with a shared, bit-exact calculation engine.
Two more are close behind. Bell Hours answers in one glance whether the US markets are trading, counts down to the next bell and keeps verified holiday calendars through 2028, with iOS and Apple Watch apps in development. Phone Drops tracks flagship phone launches: a calendar of confirmed release dates and a cycle tracker showing which phones are fresh and which are about to be replaced.
04Independent products
175+SeaTempMap destinations
30Languages in Calc²
1 kmSatellite resolution
[ From idea to release ]02 / Approach
ALL THE
WAY THROUGH.
Web
Next.js and React in TypeScript, deployed on Vercel. Static-first pages, edge caching, structured data and localisation designed in from the start, not bolted on.
iOS
Swift and SwiftUI, with WidgetKit home-screen widgets and a watchOS companion where it makes sense. Native controls, native feel, no cross-platform wrapper.
Android
Kotlin and Jetpack Compose with Glance widgets, mirroring the iOS app one-to-one so both platforms ship the same feature on the same day.
Maps and data
MapLibre GL for the interactive map; Python pipelines that bake NASA MUR satellite sea temperature, Copernicus Marine forecasts and ERA5 climatology into fast static tiles.
Localisation
Every product ships multilingual: 15 locales on SeaTempMap, 30 on Calc² including Arabic and Hebrew, with native names, declension and store listings per market.
Release and growth
App Store and Google Play publishing, review notes, screenshots, in-app purchases where needed, plus technical SEO, sitemaps, schema.org and an llms.txt for AI search.
[ Got something in mind? ]03 / Contact
LET'S TALK.
Start a conversation ↗
Good things start
with a simple hello.
App collaborations, SeaTempMap data partnerships, widgets for travel websites, or a new idea. I reply in English or Slovak.