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Coolblack
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About Coolblack

Software from Ostwestfalen,
experience from decades.

Coolblack is Dirk Nesner's company: over 38 years of IT and Apple practice, three decades of them running an Apple Premium Partner. Today Coolblack builds the AI phone agent for Apple devices — plus software, automation and Apple infrastructure for businesses that like things straightforward.

Dirk Nesner
Dirk Nesner — founder & managing director

Milestones

The road to Coolblack

From 1987 to today. The year 2026 month by month: much of it ran in parallel, a timeline only shows when something was finished.

  1. 1987
  2. 1987

    Dirk Nesner

    Started in IT.

    Working with Apple systems ever since, without a break.

  3. 1994 to 2025
  4. 1994–2025

    MACSYSTEMS GmbH

    Three decades as an Apple Premium Partner.

    Managing director of MACSYSTEMS GmbH: consulting, sales and support for Apple environments in businesses.

  5. 2026
  6. January 2026

    Coolblack GmbH

    Founded on 9 January.

    Founded in Bad Salzuflen (HRB 11865, Lemgo court). The plan: AI automation where it really takes work off your hands. Devices instead of servers, honest technology, personally reachable.

  7. February 2026

    Funding

    The state believes in us.

    Won the Gründungsstipendium.NRW: North Rhine-Westphalia funds the founding and the Coolblack Voice Agent.

  8. March 2026

    Coolblack Voice Agent

    The phone agent takes shape.

    Development starts on the AI phone agent for iPhone, iPad and Mac: answer calls, understand the request, prepare appointments, keep a record of everything.

    Voice Agent →

  9. April 2026

    Tolki

    The offline translator on the App Store.

    19 languages entirely on the iPhone: speech recognition, translation and voice output without internet, without a cloud. Now at version 1.4.

    tolkioffline.com ↗App Store ↗

  10. June 2026

    Coolblack Voice Agent

    On the App Store.

    On the App Store since 9 June 2026: in the “Local” tier, language model, voice and knowledge base run entirely on the device. No server, no subscription.

    Voice Agent →App Store ↗

  11. June and July 2026

    Many small projects

    Boti, BootAIS, Wizard Scorer, Abyss, Eclipse.

    Boti, the AI chat and app workshop on the iPhone. BootAIS, live boats on your map. Wizard Scorer, the score keeper for the card game. Plus the games Abyss and Eclipse.

    Boti ↗BootAIS ↗Wizard Scorer ↗Abyss ↗Eclipse ↗

  12. August 2026

    Erledigo

    The agent that makes calls for you, on the App Store.

    A doctor's appointment, a table at the restaurant, a message to pass on: your agent calls and speaks with a natural voice. Version 1.1 since 8 September.

    erledigo.app ↗App Store ↗

  13. August 2026

    Coolblack Voice Agent

    Version 3.0: conversations that sound real – and an agent that calls for you.

    On the App Store since 25 August: the premium tier holds real conversations, speech to speech in an EU data centre, 21 voices in German and English. And on request the agent makes the call itself, finds the number and delivers what you told it.

    To the app →On the App Store ↗

  14. August 2026

    forge-cmix v2 · data compression

    Making the impossible real: 1,000 MB down to 109.54 MB.

    A 1,000 MB Wikipedia dataset, packed without loss, every byte comes back. 1.13 percent smaller than the fx2-cmix reference from 2024, submitted to the Hutter Prize on 29 August. Data compression is one of our strengths, so MailFundus had to follow.

    Result on GitHub ↗

  15. September 2026

    MailFundus and Fipsta

    Two apps on the App Store.

    MailFundus Archive for the Mac, since 9 September: mailbox empty, everything kept, found instantly – now at version 1.1, free up to 500 messages, full version 29.99 euros. Fipsta for the iPhone, since 13 September: ideas in, video out – now at version 1.2.

    MailFundus ↗On the Mac App Store ↗Fipsta ↗On the App Store ↗

  16. September 2026

    Quantenlabor

    From the number lock to 35 qubits.

    Public and hands-on: a number lock with up to 10 million codes and 24 search qubits, a treasure hunt with 12 search qubits, research you can touch right in the browser. The biggest result, from 20 September: 35 qubits exactly on a single PC, 34 billion amplitudes – where the standard tool Qiskit Aer gives up at 31 on the same machine. Measured, checked against fixed limits and honestly placed: no world record, no quantum advantage, a simulator.

    Quantenlabor ↗35 qubits: evidence and limits ↗Try the number lock ↗The measurements as data ↗

  17. September 2026

    Visitap

    Scan business cards. Keep your promises.

    On the App Store since 28 September: scan a card, check the recognised details, save the contact – plus meeting notes, follow-up tasks and a trade-show mode for events. From trade-show contact to promise kept.

    On the App Store ↗visitap.de ↗

What we believe

Four principles, no buzzwords

Devices instead of servers

What can run on your device should run on your device. That's faster, cheaper and more private.

Ownership instead of rent

Units instead of a subscription, clear quotes instead of lock-in. You should stay because it's good — not because the contract runs.

Honest technology

We only promise what demonstrably works — and we'll tell you when something isn't (yet) sensible.

Personally reachable

You talk to the person who builds the software. No hold queue, no ticket system.

Facts & figures

Company
Coolblack GmbH, Bad Salzuflen
Commercial register
HRB 11865, Lemgo local court
VAT ID
DE459911371
Trade mark
EU word mark EUIPO 019314176
Funding
Gründungsstipendium.NRW
Founder & MD
Dirk Nesner

Press

In the press

“Ein klingelndes Telefon brachte den Salzufler Dirk Nesner auf eine Geschäftsidee”

Lippische Landeszeitung (regional daily), 9 June 2026

The paper tells the story of how a visit to the barber sparked the idea to start over at 57 — and how that became the Coolblack Voice Agent.

Read the article on lz.de

You'll find a fact sheet, print-quality press photos and app material in the press area — free of charge with the credit “Coolblack GmbH”.

To the press area