KOTSCH.TECH — Apps, tools, web design & IT by Arthur Kotsch

Apps · tools · web design · IT

Software, web tools and IT support — all under one name.

iOS & Mac apps, Windows programs, 735 free web tools, a web design studio and on-site IT help — self-built, self-supported.

View apps → 735 web tools
35 iOS & Mac apps live iPhone · iPad · Mac 735 Web tools, free No login · much of it runs locally 9 Programs for Windows Cleaner · Commander · Notes 20 Industry demos, web design Trades · practices · hospitality

Apps — recently updated

All 35 apps →

DHSN-Glauchau

v2.2.2 · 30 minutes ago

iPhone & iPad app

PyCraft

v1.0 · 1 week ago

iPhone & iPad app

FloorStudio - Floor Plan App

v1.0.1 · 2 weeks ago

iPhone & iPad app

Expiry - Expiration Tracker

v1.0.1 · 2 weeks ago

iPhone & iPad app

All sections

One name, 9 worlds

01 Apps

iOS & Mac

Apps for iPhone, iPad & Mac

 02 Apps

Windows

Programs for Windows

 03 Apps

Android

Android apps

 04 Tools

Web tools

Free online tools

 05 Mehr

Shop

Hardware & digital products

 06 Mehr

News

Articles & guides

 07 Services

IT Help

IT support & help

 08 Services

Web design

Web design studio & templates

 09 Apps

SplitMate

Gruppenkasse ohne Konto — App & Web

Web tools

735 tools. No login. Most run right in the browser.

PDF, images, text, calculators, developer tools — free to use, no account, no upload where it can run locally.

Browse tools
Developer Finanzen Gesundheit Mathematik Alltag Haushalt Business Energie

Services & support

Web design · IT help

Web design · project
We're a roofing company with no website at all. Is it even worth it?
Yes — most people search online first. Let me show you a demo for your trade.
That looks better than our competitor's. What does something like that cost?
Fixed price, agreed in writing beforehand. Text, images, imprint and privacy included.
And can we change things ourselves later?
Yes. You get an account and a short walkthrough.

< 24h

FIRST REPLY

94%

SOLVED REMOTELY

0€

IF UNSOLVED

Web design studio

Websites for trades, practices, hospitality and services — 20 industry demos as a starting point.

  • → Studio & Vorlagen
  • → 20 Branchen-Demos
  • → Modernes Web design
View demos →

IT help

PC, phone, printer, Wi-Fi — on-site locally or remote, explained in plain language.

  • → Vor-Ort & Remote
  • → Keine Lösung = kein Preis
  • → PC · Handy · WLAN
Request help →

Projects & lab

6 entries

Not every project is a finished product. This is where the systems we use live, alongside the things currently in the works.

PRJ-01 KARC Bildkompression, die JPEG schlägt aktiv PRJ-02 Convertly+ Jede Einheit. Sofort. Schön. live PRJ-03 Tester Become a beta tester offen PRJ-04 Wissen Lernen nach Themen — PDFs & Lernsites laufend PRJ-05 Bachelorarbeit Die Arbeit erklärt — Kapitel, Daten, Grafiken Forschung PRJ-06 Umfrage Probleme melden, Lösungen gestalten offen
karc.json 
{
    "projekt": "KARC",
    "code": "PRJ-01",
    "status": "aktiv",
    "beschreibung": "Bildkompression, die JPEG schlägt",
    "link": "karc.kotsch.tech/en"
}
ANSEHEN→

Guides & news

Tech explained in plain language — what actually helps, no jargon.

ALL TOPICS →
Software 7 Min. Lesezeit

Splitwise-Alternative: offline & ohne Anmeldung

Du suchst eine Splitwise-Alternative ohne Konto und ohne Abo? SplitMate teilt Kosten komplett offline, ohne Cloud, ohne Tracking – mit einmaligem Pro-Kauf.

13.07.2026 Read → Software 7 Min. Lesezeit

SplitMate Anleitung: Ausgaben in 5 Schritten aufteilen

SplitMate Anleitung: In 5 einfachen Schritten Gruppe anlegen, Mitglieder hinzufügen, Ausgabe eintragen, Aufteilungsart wählen und fair abrechnen – offline, ohne Account.

13.07.2026 Read → Software 7 Min. Lesezeit

WG-Kosten aufteilen, Urlaub & Restaurant teilen: SplitMate

WG-Einkauf, Urlaub, Restaurantrechnung oder Projektkosten teilen: 4 echte Szenarien zeigen, wie du mit SplitMate offline und ohne Konto fair abrechnest.

13.07.2026 Read →
Software Sicherheit Windows Multimedia Internet AI & Tools Ratgeber Everyday