1987
Dirk Nesner
Started in IT.
Working with Apple systems ever since, without a break.
About Coolblack
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.

Milestones
From 1987 to today. The year 2026 month by month: much of it ran in parallel, a timeline only shows when something was finished.
1987
Dirk Nesner
Working with Apple systems ever since, without a break.
1994–2025
MACSYSTEMS GmbH
Managing director of MACSYSTEMS GmbH: consulting, sales and support for Apple environments in businesses.
January 2026
Coolblack GmbH
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.
February 2026
Funding
Won the Gründungsstipendium.NRW: North Rhine-Westphalia funds the founding and the Coolblack Voice Agent.
March 2026
Coolblack Voice Agent
Development starts on the AI phone agent for iPhone, iPad and Mac: answer calls, understand the request, prepare appointments, keep a record of everything.
April 2026
Tolki
19 languages entirely on the iPhone: speech recognition, translation and voice output without internet, without a cloud. Now at version 1.4.
May 2026
Coolblack
Since 24 May 2026 “Coolblack” has been protected as an EU word mark (EUIPO 019314176).
June 2026
Coolblack Voice Agent
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.
June and July 2026
Many small projects
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.
August 2026
Erledigo
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.
August 2026
Coolblack Voice Agent
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.
August 2026
forge-cmix v2 · data compression
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.
September 2026
MailFundus and Fipsta
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 ↗
September 2026
Quantenlabor
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 ↗
September 2026
Visitap
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.
What we believe
What can run on your device should run on your device. That's faster, cheaper and more private.
Units instead of a subscription, clear quotes instead of lock-in. You should stay because it's good — not because the contract runs.
We only promise what demonstrably works — and we'll tell you when something isn't (yet) sensible.
You talk to the person who builds the software. No hold queue, no ticket system.
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.deYou'll find a fact sheet, print-quality press photos and app material in the press area — free of charge with the credit “Coolblack GmbH”.