Nicolas Kaczmarski · Independent maker

Products to use. Stories to watch.

I turn ideas into apps, tools and videos. From monitoring websites with AlertsDown to explaining technology with It Few and exploring surprising facts with RedfleXion — this is what I create.

Discover AlertsDown Watch my videos
5 products to explore ↘ 3 video brands to discover ↘ Scroll
01

Made to
be used.

Tools that solve everyday problems, and a game made for a little fun. I design, build and run each one. Find something useful, then give it a try.

Featured product

AlertsDown

Know when your websites and APIs go down, and when an SSL certificate needs attention. Get alerts in Chrome, by email, or on your phone through WhatsApp, SMS, Signal and Telegram — with an iPhone app coming soon.

  • MonitorWebsites, APIs and SSL certificates
  • Start freeEmail and Chrome alerts, no credit card required
  • For agentsHosted MCP to set up and manage monitors
Uptime monitoringChrome extensionWhatsAppSMS
Start monitoringAdd to Chrome
AlertsDown website, captured from the live homepage
Website preview · October 2026 Visit site ↗
AlertsDown Chrome extension with monitor status and a desktop downtime notification

On your desktop

One click from your toolbar.

Check monitor status and get downtime, recovery and SSL notifications. Chrome alerts are included on every plan.

Get the Chrome extension ↗

In your pocket

AlertsDown for iPhone.

Coming soon

Your monitoring, with you. An iPhone app is on the way.

Where you already are

An alert you’ll actually see.

WhatsApp ↗SMS ↗Signal ↗Telegram ↗More integrations ↗

Email & Chrome on every plan. SMS, Signal & Telegram on paid plans. WhatsApp on Saas & Founding Builders.

Live

Buy European

Find European-made products and check where a product comes from. Scan a barcode in the mobile app or web scanner, and discover local manufacturers.

  • PlatformsiOS, Android and web
  • ScannerCheck a product’s country of origin
  • DiscoverEuropean products and manufacturers
Barcode scannerEuropean productsMobile & web
Explore European products
Buy European website, captured from the live homepage
Website preview · October 2026 Visit site ↗
Live

Fastsend

Messaging for AI agents. Connect your agent to a hosted MCP server and send SMS, email, WhatsApp, Telegram and Signal messages, with pay-per-send pricing and delivery tracking.

  • ChannelsSMS, email, WhatsApp, Telegram, Signal (beta)
  • SetupA setup prompt for your coding agent
  • PricingPay per send, with x402 payments
MCPAI agentsMessaging
Connect your AI agent
Fastsend website, captured from the live homepage
Website preview · October 2026 Visit site ↗
Live

Klairia

See whether AI assistants recommend your brand or your competitors. Weekly scans use progressively more specific prompts to track first mentions and visibility gaps across models and languages.

  • MeasureFirst-mention level and competitor gaps
  • CadenceWeekly scans across five active topics
  • For agentsMCP and API access on paid plans
AI visibilityWeekly scansCompetitor tracking
Explore your AI visibility
Klairia website, captured from the live homepage
Website preview · October 2026 Visit site ↗
Live on the App Store 2026

ViroPop

A pixel-art arcade game for iOS. Match each growing virus to its antidote before it bursts. Play Endless mode offline, or take on the Daily Challenge and compete in the daily ranking.

  • Play anywhereOffline Endless mode for a quick game
  • Beat your bestBuild combos and chase a higher score
  • Come back dailyA fresh Daily Challenge with online rankings
Pixel-art arcadeiPhoneDaily Challenge
Get ViroPop for iPhone
ViroPop home screen with the pixel wordmark, best score and Play button
ViroPop gameplay: pixel viruses spreading with antidote syringes in the bottom bar ViroPop end-of-run screen with the score breakdown
ViroPop · In game
02

Stories worth
sharing.

I turn complex ideas and surprising facts into visual stories. Watch a few, then follow the series that catches your curiosity.

Technology, explained

It Few

How does a computer actually work? My visual explainers take you from a single bit to the machine on your desk.

Watch It Few on YouTube ↗

Un fait par jour

RedfleXion

History, science and the wonderfully unexpected. My French series “Un fait par jour” brings one surprising fact to life in each episode.

Follow RedfleXion ↗

Pick a story and press play. Explore the channels for more episodes.

Find me on your feed

Snapshot ·
TikTok

RedfleXion

Curiosity, in short.

4,400,506Video views
155,749Likes
79Videos
TikTok

CryptoActu

Crypto & Web3 stories.

125,988Video views
525Likes
59Videos
TikTok

It Few

Technology, explained.

1,263Video views
62Likes
7Videos
Instagram

RedfleXion

A different perspective.

2,538Video views
26Likes
21Videos
Instagram

It Few

How computers work.

2,153Video views
39Likes
6Videos

Views and likes across the published videos in this dated snapshot. Views are not unique viewers. YouTube, Facebook and X are not included.

03

Behind
the work.

I’m Nicolas. I make the products I want to use and the videos I’d want to watch.

My work moves between software and storytelling. I take products from the first sketch to a working release, then keep improving them. That includes web tools, mobile apps, a Chrome extension and a game.

On the creative side, I make technology easier to understand with It Few, tell stories behind surprising facts with RedfleXion, and explore crypto and Web3 with CryptoActu. Different formats, the same curiosity.

5Products shipped
3Video brands
1Independent maker

From idea to audience

  • Product design and development
  • Web apps, mobile apps and browser extensions
  • AI tools and automation
  • Video storytelling and visual explanations
  • Publishing, distribution and audience growth
04

Say
hello

Interested in a product, a video collaboration or building something together? Tell me what you have in mind.

hello@nkprod.fr
X / Twitter · @niccolaski GitHub Buy European Fastsend AlertsDown