Welcome! 
Glad to have you here. This site belongs to a passionate developer.
In Short: This WebApp is a simple inventory tool designed to help you get started as an entrepreneur. You can store Articles, offer Services and Create Invoices with PDFs.
This project is still in its early BETA.
Some features are not yet available.
Features 
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Simple item registration:
With the item template, you can easily enter and save any item. Import/export inventory (Soon):
Import inventory data from other programs, for example as CSV files.-
Create PDFs:
Generate PDFs of the contents of your shelves. -
Create Invoices
Whether it's a service or a sold item, your invoice can be exported with one click or sent automatically if needed. Free invoice creator is available. Automatic invoices for articles will follow soon.
Using it 
At mister-unternehmer.de, you can register and get started right away. You’ll have access to “shelves” that you can create and edit. These shelves have categories and properties that play an important role in inventory management. Every shelve can have articles of a specific type in it. Creating Invoices to specific articles / serviceofferings is possible too (soon).
More Features are coming soon.
Media
Info
Keep in mind that mister-unternehmer.de is still under development. It is recommended to use it with test data when asked for personal information (when creating Invoices for example or filling out your own Profile info).