Portfolio
Digital products, built to last
Each with its own name and its own hand — software at the core, music and moving image alongside. Everything shown here can be opened today, without signing up.
EveryLingua
The whole grammar of a language — explained in your own, level by level.
34 language pairs, each explained in the learner's own language: 4,306 grammar topics, 547,228 words and 17 practice modes. Free, no account, no cookies.
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Bootsschein-Trainer
All 1,516 official theory questions for six certificates — explained, not just ticked.
The official question catalogues for the German boating licences, the SKS and the radio certificates, verbatim — with the reason behind every right answer.
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Einbürgerungstest online üben
Practise every question of the German citizenship test — and see exactly when you are ready.
The official question catalogue for the German citizenship test and the “Leben in Deutschland” test, word for word — with a simulation scored by the regulation.
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ImmoZahl
What a property actually carries — worked out before anyone signs.
60 calculators for private landlords, buyers and owner-occupiers: yield, purchase costs, tax and tenancy law — each with its working and its source.
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StrikeAndYield
Financial products explained — from the first sentence to the pricing formula.
An atlas of financial products: 129 instruments across eleven asset classes, each explained at five depths, with 142 calculators and a 303-term glossary.
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Indigo Atoll
The islands of the Indian Ocean, sorted by what you are actually looking for.
A travel portal for the Maldives, Seychelles, Mauritius and La Réunion — 71 destination profiles, a map and an advisor that answers questions in plain language.
Learn moreThe next product grows here
It follows the same way of building: bilingual, fast, frugal with data. It will be announced when you can use it.
Discuss an ideaNo product is currently listed in this field.
Straight in
33 ways into the middle of a product
Every one of these is a page that really exists — checked inside the projects themselves. If you already know what you are after, you should not have to land on a home page first.
Side by side
Which one is yours?
Four cards answer what each one is. They do not answer which one fits you — for that they stand here in a row.
| EveryLingua | Bootsschein-Trainer | Einbürgerungstest online üben | ImmoZahl | StrikeAndYield | Indigo Atoll | |
|---|---|---|---|---|---|---|
| Field | Languages & learning | Watersports | Citizenship & integration | Property & finance | Financial knowledge | Travel & advice |
| Who it is for | Learners who want to work through a language completely — explained in their own, from the first sentence to the fine detail | Anyone taking a German boating licence, the SKS or a radio certificate who wants to understand what they are ticking | Anyone applying for German citizenship or taking the “Leben in Deutschland” test | Private landlords, buyers and owner-occupiers in Germany | Anyone who wants to understand financial products properly — from entry level to pricing | Travellers planning an upmarket long-haul trip themselves |
| On the web | everylingua.com | www.bootsschein-trainer.de | www.einbuergerungstest-online-ueben.de | immozahl.com | strikeandyield.com | indigoatoll.com |
| In figures | 34 language pairs 4,306 grammar topics 547,228 words in lists | 1,516 exam questions 878 explanations written here 153 reference boards | 300 general questions 16 federal states with their own questions 33 questions in the simulation | 60 calculators 23 side-by-side comparisons 10,635 municipalities with local data | 129 financial products 11 asset classes 5 levels of explanation each | 71 destination profiles 4 island groups 2 languages, no cookie banner |
Beyond software
Music and moving image, in the same hand
Under the same roof, a label is working on its own music and its own video formats. The rule is the same as for every product: what is released is finished.
Music
Original productions, from sketch to release. The standard is the same as for the software: better one piece that holds than ten that fill space.
Video & YouTube
Original formats for the moving image — told rather than cut together, with a clear visual line. Channels and first episodes are currently in the works.
Principles
Four sentences we can be held to
We build what we want to keep
Every product is meant for the long run. What we start, we want to be looking after in ten years — and that decides today how we build it.
Care before speed
Better one product that holds than three that need explaining. We work independently — which is why we are allowed to wait until something is good.
Frugal with data
Our sites work without cookies, without consent banners and without third-party servers. What we want to know we count ourselves — in totals no one can be read out of. Not because it is required, but because it feels cleaner.
Honest in figures and words
There is no number on this site we cannot back up, and no product you cannot use. Anyone who checks should find what is written here.
Verifiable
You do not have to take our word for it
What this page says about data frugality and care can be checked in two minutes — on this site and on every other one we run. Here is how:
No third-party servers
Open the developer tools, go to the Network tab and reload. Only addresses on this domain appear — no font service, no map provider, no third-party analytics. The one request that is not page content goes to /api/zaehler on this server: our own count, described line by line in the privacy policy.
No cookies
The Application tab lists no cookies. That is why there is no consent banner: there is nothing to consent to.
Rules, not just intentions
The server's first response carries a Content Security Policy that technically prevents content of foreign origin. Visible in the headers of that same request.
An open route for reports
Anyone finding a security issue does not have to hunt for a contact: /.well-known/security.txt states it, following RFC 9116.
Questions
What we are asked most often
Which products are there?
The portfolio holds EveryLingua, Bootsschein-Trainer, Einbürgerungstest online üben, ImmoZahl, StrikeAndYield and Indigo Atoll — each with its own page, its own status and its own figures. Further ones join once you can use them; announced products do not appear here.
Who is behind this?
A house that builds rather than administers. The paths are short and the answer comes from the people who made the product — not from a distribution list.
What about music and film?
Beside the software, a label works on original music and original video formats. What gets finished there, we show here — announcements we do not.
How are you funded?
Without outside investors, from our own business. There is nobody who needs an exit, and nobody who overrules the care a product deserves.
What happens to my data?
As little as possible. Our sites set no cookies and load nothing from third-party servers. How often a page is opened we count ourselves — on our own server, without IP addresses and without recognising anyone. Whatever a product needs beyond that is stated in its own privacy policy.
Can we work together?
Gladly. It fits best if you have an idea that could become an independent product, or an existing product you would like to see in good hands. Just tell us what it is about.
How quickly do you reply?
On working days, usually the same or the next day. A person reads it, not a distribution list.
An idea, a venture, a product?
Whether your own product, a joint venture, a project looking for a good home, or music and moving image — tell us about it.
Start a conversation