Privacy, clear by section
The general policy covers everything. On top of that, there is a dedicated, plain-language privacy note for every section, app and program — no legal fog.
Sections
Privacy notes per service — from the shop to the survey.
Shop
The shop offers digital products only. To process your order we handle the contract and payment data you provide.
DetailsSurvey (ProblemRadar)
The ProblemRadar survey platform is for market research: you describe everyday or work problems so we can design su...
DetailsWeb tools
Most web tools run entirely in your browser. Your input is not transmitted to the server unless the specific tool e...
DetailsKARC
KARC is an image compression method. The live demo compresses an image you choose to show the result directly.
DetailsBeta testers
Anyone who wants to become a beta tester can apply via a short form. We process the contact and device details you...
DetailsKnowledge
The learning hub offers PDFs and self-hosted learning sites. You can view and download content without an account o...
DetailsNews
The news section offers articles and guides. No sign-up is required to read.
DetailsIT help
For IT help and support requests we process the details you submit to solve your problem.
DetailsWeb design
For project and web design enquiries we process the contact and project data to clarify feasibility, scope and requ...
DetailsEmail list & lead capture
When you enter your email address on one of our pages to receive free content, checklists or guides, we process you...
DetailsUser account
When you create a free account, you unlock all knowledge articles and the premium web tools. For the account we onl...
DetailsApps for iPhone, iPad & Mac
Each app processes data locally or via Apple by default.
DE-Companion
Universal companion with widgets, Watch and CarPlay support.
iPhoneApple WatchWidgetsConvertly+
Unit and measurement converter for iPhone and iPad.
iPhoneiPadCampus dualPor
Campus portal app for everyday student life.
iPhoneKotsch Orders
Overview of shop orders.
iPhoneLernCrew+
Organise study groups and learn together.
iPhoneMedTimer
Reminders for taking medication.
iPhoneMVK TEAMS
Team workspace for organisation and coordination.
iPhoneNote+
Quick notes focused on simplicity.
iPhonePlanPilot
Planning and tasks across iPhone, iPad and Mac.
iPhoneiPadMacOneBar
Compact helper app in the bar.
iPhoneSmoothRide
Support against motion sickness.
MacWindows programs
Run locally on your PC — no telemetry sent to us.
Kotsch.Cleaner
System cleaner that analyses files locally.
DetailsKotsch.Cleaner Optimizer
System optimisation and cleanup, locally.
DetailsKotsch.Code
Lightweight code editor for Windows.
DetailsKotsch.Commander
File explorer and file management.
DetailsDE Companion
Companion app, run locally.
DetailsLumina Stream
Media tool for Windows.
DetailsKotsch.Notes
Notes locally on your PC.
DetailsPrüfmittel Manager
Management of inspection equipment, locally.
DetailsKotsch.TaskManager
Process and performance monitor.
Details