Coolblack Voice Agent app
Your AI phone agent.
No server. No subscription.
For English speakers running a small business in Germany — trades, salons, workshops, restaurants and service providers: Coolblack answers calls, replies to questions and records every request — as an app for Apple devices: iPhone, iPad and Mac. Available on the German App Store.
Free download · Test free for up to 60 minutes · No account required
What your agent handles
An employee for the phone — without hiring
Answer calls
Your agent picks up when you can't — friendly, patient and even after hours, as long as your device has a connection.
Answer questions
Opening hours, services, prices: the agent answers from your knowledge base, not out of thin air.
Prepare or book appointments
Appointment requests are captured in a structured way and booked directly if you want.
Note callbacks
Name, number, request — cleanly logged instead of lost on sticky notes.
Forward important calls
What really needs you reaches you. You can take over at any time.
Document everything
Call logs, contacts and tasks live locally in the app after the call.
Seen in 43 seconds
See your agent at work
A craftsman, a ringing iPhone, an agent that takes over — the Coolblack film shows what it feels like in everyday business.
Setup
Enter your website, start your agent
No IT project, no training. Three steps and your agent is reachable.
- 1
Understand the business
You name your website — Coolblack prepares services, hours, prices and FAQs as starting knowledge.
- 2
Customise the agent
Voice, language, greeting, behaviour and allowed actions — you set them per agent.
- 3
Become reachable
Connect your own SIP number — or just test on the device first.
For iPhone, iPad and Mac
Several agents, one overview
Reception, support or emergency line: each agent has its own voice, language, knowledge base and availability — on iPad and Mac (e.g. MacBook Air) with a full overview of behaviour, knowledge, capabilities and logs.
Local or online
You decide where your agent thinks
The tier sets quality and the per-minute price — per agent, switchable any time.
All tiers: GDPR-compliant – view the data processing agreement
Local
1 unit/minAI and voice run entirely on your device. Great for simple calls, even offline.
Standard
2 units/minA very good voice at a lower price, with the same smart cloud AI as Premium. Requires internet.
Premium
3 units/minThe most natural voice and best call quality for demanding customer conversations. Requires internet.
For businesses with their own AI
Bring your own in-house LLM
Does your company run its own language model? You can set it as the AI source in the app. Your agent then thinks with your model, in your infrastructure — full data sovereignty, entirely without external AI providers.
- Set your own LLM as the AI source
- Answers from your own infrastructure
- Ideal for sensitive sectors and internal rules
Control & privacy
The agent belongs on your device
Coolblack is deliberately built differently: no ad SDKs, no analytics trackers, no sharing of data for advertising, no account.
GDPR-compliant – view the data processing agreement
Local mode
AI model and voice run on your iPhone, iPad or Mac.
Protected online mode
Premium quality over a GDPR-compliant connection covered by a data processing agreement, when you want it.
Local logs
Agent profiles, knowledge bases and call logs live in the app.
Made in Germany
Developed and operated by Coolblack GmbH in Bad Salzuflen.
Units instead of a subscription
Pay fairly, only for what you use
To start, you can test free for up to 60 minutes (60 units; Standard and Premium use them faster). After that you top up — credit doesn't expire.
60
units
free
starting credit in the app
120
units
4,99 €
one-time in-app purchase
450
units
14,99 €
one-time in-app purchase
1,000
units
29,99 €
one-time in-app purchase
All prices incl. VAT, purchased via the App Store. See the full pricing overview
Questions about the app
Good to know
Does my credit expire?
No. Units remain until you use them. There's no monthly charge and no contract term.
Can I create several agents?
Yes. Each agent gets its own voice, language, knowledge base and, if you like, its own phone number — for example reception, support and an emergency line separately.
How does the agent know what to say?
You provide your website — Coolblack prepares services, hours, prices and FAQs as starting knowledge. You then extend or correct the knowledge base right in the app.
Does the agent work without internet?
Yes, in the “Local” tier: after a one-time download, AI model and voice run entirely on your device — 1 unit per minute.
Can the agent work with our in-house LLM?
Yes. You can set your own language model as the AI source in the app — the agent then uses your infrastructure instead of external providers.
Can I try the app risk-free?
Yes. The download is free, 60 units of starting credit are included — up to 60 minutes, fewer in the higher tiers — and you can test your agent right on the device — with no real calls or phone number.
Your agent is already waiting.
Download free, test for up to 60 minutes — no subscription, no server.