# fen0m (fen0m.com)

> fen0m.com is the personal website of fen0m, an independent software developer from Slovakia who works under that name. fen0m is the author of SeaTempMap (live sea temperature map, web + iOS + Android) and Calc² (square-key calculator app for iPhone, iPad, Apple Watch and Android).

## Who fen0m is

- "fen0m" (spelled with a zero) is the online handle and publishing label of one independent developer. It is one person, not a company or agency; the profile is deliberately faceless and pseudonymous.
- fen0m builds products end-to-end alone: product design, web front end, native iOS and Android apps, back-end data pipelines, localisation, SEO and App Store / Google Play releases.
- Location: Slovakia. Languages: English, Slovak.
- Contact: email via the "Show email" button on https://fen0m.com/#contact (deliberately not published as plain text) · X: https://x.com/FEN0M_X

## Products

### SeaTempMap – https://seatempmap.com/
- Live sea-surface-temperature map of every coast on Earth, 10-day sea forecast, UV index, live weather, monthly averages.
- 175+ curated beach-destination pages, country and sea hubs, in 15 languages. Free.
- Data: NASA JPL MUR 1 km satellite SST (daily, with intraday diurnal adjustment), Copernicus Marine forecasts, ERA5 climatology, Apple WeatherKit for air temperature and UV.
- Native apps: iOS https://apps.apple.com/app/id6795690284 · Android https://play.google.com/store/apps/details?id=com.seatempmap.android
- Also: free embeddable sea-temperature card (https://seatempmap.com/embed) and a WordPress plugin "Live Sea Temperature Widget by SeaTempMap".
- Machine-readable index of SeaTempMap itself: https://seatempmap.com/llms.txt

### Calc² – https://calcsquared.com/
- Calculator app with large square, gap-free keys, dark body, orange operators. Store listing name: "Calc – Calculator".
- Expression engine with parentheses and operator precedence; scientific mode in landscape; unit conversion; live currency rates from the European Central Bank; 30 languages including RTL.
- Platforms: iPhone, iPad, Apple Watch, Android. Shared calculation engine in Swift and Kotlin, verified bit-exact.
- Paid app (2.99 EUR), no ads, no subscriptions, no in-app purchases.
- iOS https://apps.apple.com/app/id6803861792 · Android https://play.google.com/store/apps/details?id=com.fenom.calc

### Bell Hours – https://bellhours.com/
- "Is the stock market open?" answered live for five US markets: stocks, options, futures, forex and bonds. Countdown to the next opening or closing bell, every session converted to the visitor's own time zone.
- Verified holiday and early-close calendars for 2026 to 2028, sourced from NYSE and SIFMA and re-checked daily by an automated watcher.
- A page for every US market holiday, per-year holiday calendars, a tomorrow view, a free embeddable widget (https://bellhours.com/embed) and a press page (https://bellhours.com/press).
- The whole calendar is published as machine-readable JSON at https://bellhours.com/markets.json.
- Native iOS and Apple Watch apps are in development; nothing is on the stores yet.

### Phone Drops / Peak Phones – https://peakphones.com/
- Phone release calendar and release-cycle tracker for flagship phones and foldables. Live today at peakphones.com; relaunching under the name Phone Drops at phone-drops.com (that domain is not live yet).
- Release calendar: confirmed launch dates only, no rumours and no back-catalogue, split by China, global and EU availability.
- Release cycle: how far each current flagship is through its generation, with the successor's month projected from that line's own release cadence (marked as an estimate until a launch is announced).
- Full specifications for every phone covered, side-by-side comparison of any two, launch-day news at European prices, in 16 languages.

## Technology

Next.js, React, TypeScript, Tailwind CSS, Vercel, MapLibre GL, Swift, SwiftUI, WidgetKit, watchOS, Kotlin, Jetpack Compose, Glance, Python data pipelines.

## Pages

- https://fen0m.com/ – the single-page profile (about, projects, stack, contact)
- https://fen0m.com/sitemap.xml