Web apps to try
No promises — just try them
I don't just build websites, I also build small custom web applications: internal tools, planning boards, assistants. Here you can try real apps live — no login, no appointment, no obligation.
Live demo
Project Manager
A task board for projects: create tasks, tick them off, move them by drag & drop — with checklists, due dates and an activity log. Your team could get a tool just like this: for inquiries, orders or internal workflows — hosted on your own server, with no per-user subscription fees.
Open the demo — go ahead and touch it →
Free · no account
China Lernen — Chinese trainer
A complete learning app in the browser: vocabulary trainer with spaced repetition (HSK 1–6, over 5,000 words), writing practice with stroke-order animation, tone exercises and grammar — plus a tutor you connect to your own AI account. Your progress stays local in your browser and can be saved as a file.
Also as an app: for Android (APK) and Windows (installer) — the same app, additionally with on-device AI on Windows. Early version — updates coming; the apps notify you themselves when a new version is available.
Open in browser ↗ Android APK ↓ Windows setup ↓ Read the guide →
Free · no account
Lead Scanner — capture trade fair contacts
Photograph a name badge or business card, dictate a short note about the conversation and save the finished contact. The app sorts name, company, priority and next step automatically; afterwards you export your leads as an Excel file or individually as contact files for your address book.
Data-minimal: contacts and photos stay locally on your device. Text recognition runs there as well; only the recognised or typed text is sent to AuxData for structuring.
Open in browser ↗ Android APK ↓ Read the guide →
Free · no account
Find a date — when can everyone make it?
You suggest a few days and a time window and share the link. Everyone marks with their name and a self-chosen PIN when they're available — a colour-coded overview instantly shows where most people overlap. Handy for club meetings, parents' evenings or the next team meeting.
No sign-up: nobody needs an account, no email addresses are collected. After the date has passed, the poll cleans itself up.
Try it now → As a WordPress plugin ↓
Free · no account
Vote on a date — which one fits best?
When the options are already fixed and only the votes are missing: you list the dates, everyone answers yes, if necessary or no per option. The table adds it all up and highlights the date that fits best.
The little brother of the grid above: no time-window painting, just a simple yes-no vote. Also with name and PIN, no account.
Try it now → As a WordPress plugin ↓Your idea here?
You have a workflow that today consists of paper notes, spreadsheets or email chaos? Describe it to me in one sentence — I'll tell you honestly whether it can be turned into a simple web app, and what that costs. More demos will appear here.
Describe your idea →Good to know: only the project manager demo is public — what you change there is visible to other visitors, and it resets every night at 4 a.m. In the China app your progress stays local. In the lead scanner, contacts and photos stay on your device; only the recognised or typed text is sent to AuxData for automatic structuring. In the two scheduling tools you identify yourself only with a name and a self-chosen PIN — no email, no account. Heads-up: the user interface of these tools is currently German — English versions may follow.
A tool like this for your team?
Tell me briefly what eats time in your day-to-day — I'll get back to you with an honest assessment of whether and how a web app would help.