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Kroener Digital

Six applications that each replaced a spreadsheet nobody trusted

Every application here started as a real problem in a real company: a cost list that could not be summed, a scheduled email that never left, a business card that was out of date the day it was printed. You licence the ones you need, and they share one login.

What you can licence

Six applications, licensed one at a time per organisation. Nothing is bundled: an organisation that only wants the licence manager pays for the licence manager.

MCP Server

Your own data in an AI assistant, under permissions you set per application.

About MCP Server

Send Later

Scheduled sending for IMAP and SMTP mailboxes, with the laptop shut.

About Send Later

License manager

Every software subscription, its real monthly cost and the last day you could still cancel it.

About License manager

Visitenkarte

A digital business card with a vCard QR code, on a paired phone, working offline.

About Visitenkarte

AI maturity check

Where your AI adoption stands today, scored across four dimensions and repeatable next quarter.

About AI maturity check

ROI calculator

Hours saved against effort spent, with the payback period and the figures it rests on.

About ROI calculator

Three things that are true of all of them

Your organisation's data stays your organisation's

Every record belongs to exactly one organisation, and three independent controls enforce it — the connection is stamped with your organisation, every query is filtered by it, and a write that would move a row to another one is refused outright.

Nothing is ever really deleted

Deleting hides a record and records who hid it and when. A recycle bin puts it back. Only an operator can remove data permanently, and that is a separate, deliberate act.

A page load fetches nothing from anyone else

No external fonts, no trackers, no content delivery network. There is no third-party request to disclose, because there is no third-party request.

Which of the six is your problem?

There is no signup form. Tell us what is not working and we will say honestly whether one of these fixes it.

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