Need an app?
I'll build it to measure.

For founders, the self-employed and small and mid-sized businesses. I build iOS and Android apps that fit your exact use case, from the first idea to everyday operation. Your own app is no longer a major undertaking.

Start a project How we work together
01 — Who it's for

Your own app, for your business too

Many people picture corporate budgets when they think of their own app, and stick with a web app or a cobbled-together tool. Yet today a real iOS and Android app is within reach for the self-employed and small businesses too, tailored to exactly what you need.

You're founding a company.

You have an idea, or already a prototype built with Lovable, Bubble or Figma, and want a product real users can rely on.

You're self-employed.

An app for your clients or for your own working day: appointments, orders, documentation, the way you work.

You run a business.

Instead of paper, spreadsheets and patchwork tools: an app your team is glad to use in the field, in the workshop or at the customer's site.

02 — How we work

From idea to app

Three steps. I meet you where you are.

  1. 1

    Clarify & plan

    What your app needs to do, and what it doesn't.

    You get

    • A clear scope and next step
    • A realistic view of effort and cost
    • No money spent in the wrong direction

    Typical starting point

    • Idea, prototype, spreadsheet or existing software

    FreeIntro call & initial review

  2. 2

    Build the app

    A first version that works in everyday use.

    You get

    • An app, not a demo
    • A foundation that holds
    • Visible progress up to launch

    Typical starting point

    • The scope is agreed

    from €15,000plus VAT, at a fixed price

  3. 3

    Support & evolve

    Your app stays current and grows with you.

    You get

    • Updates for new iOS and Android versions
    • New features when you need them
    • One contact who knows your app

    Typical starting point

    • The app is in use

    Billed by time spent

03 — Projects

My own products

Built myself, from the first idea to real users. This is where I try out what I recommend to my clients.

NutriSpy app icon

since 2025 · iOS & Android · 4.7 · 1,000+ downloads (Google Play, as of October 2026)

NutriSpy

Food and symptom diary

I have worn wearables for years and kept a food diary for just as long. No app ever convinced me: some were so cumbersome that they got dropped after a few days of everyday life. Others left food out entirely and tracked a single dimension, such as sleep or activity. Yet to me, nutrition is the biggest lever for your long-term health – even ahead of exercise.

So I built NutriSpy. Meals, digestion, symptoms and sleep land on one timeline – via a short message and wearable sync – and the app shows what is likely behind them.

What it taught me: everything that turns an app into a product

  • Tech that holds up: app, backend and AI analysis, built to scale
  • Winning users: Google, Apple and Meta ads, run myself
  • Doing the math: lifetime value vs. acquisition cost

What this means for you: I don't just think in code, I think in product. I know from experience what lies between the first version and paying users.

  • Expo / React Native
  • Python / FastAPI
  • PostgreSQL
  • LLMs
NutriSpy – the food & symptom diary app that finds triggers
FieldFix app icon

since 2026 · mobile app & web

FieldFix

AI knowledge platform for field technicians

When experienced technicians retire, their knowledge leaves with them. FieldFix keeps it: technicians capture problems and solutions right on site, and the whole team finds them again on the next job.

  • Capture by voice, text, photo, video
  • AI turns it into searchable team knowledge
  • Web dashboard for managers

What this means for you: I know how technical businesses work, and that an app only catches on there if it's faster in everyday work than pen and paper.

  • React Native
  • React / Vite
  • FastAPI
  • pgvector
  • LLMs
FieldFix – the AI memory for field technicians
04 — About

Who you'd be working with

Hi, I'm Aaron.

As technical co-founder, I took a Munich FinTech startup from zero to over €1 million in annual revenue over seven years: from the first product to a growing company, working closely with founders, product and investors.

With WeavingCode, I now bring that experience to founders, the self-employed and businesses who need a custom-built app.

I know what has to be good enough at the start and what only matters later. My background in physics, biology and bioinformatics helps most when your app involves complex or data-intensive problems.

  1. since 2026 FieldFix – own product
  2. since 2025 NutriSpy – own product
  3. 2018 – 2025 CTO & technical co-founder, FinTech startup, Munich From zero to over €1M in annual revenue
  4. Education PhD bioinformatics · Diplom biology · BSc physics
  • Mobile apps (iOS & Android)
  • React Native / Expo
  • Backend architecture
  • Python
  • Data pipelines & APIs
  • AI & LLM integration
  • Cloud-native
  • Databases & performance

LinkedIn ↗ GitHub ↗ Google Scholar ↗

Aaron Taudt
05 — FAQ

Frequently asked questions

What does an app cost?

A first version of your app starts at €15,000 plus VAT: for iOS and Android, with its own backend, published in both app stores. The intro call and initial review are free. After that you get a fixed-price offer for the agreed scope. Further development and support are billed by time spent. The price is possible because I build iOS and Android from one codebase, on building blocks that already run in my own apps.

Why a real app and not a web app?

An app opens with one tap on the phone, can work offline, uses the camera, location and push notifications, and can be found in the app stores. Where a web app is enough, I'll tell you.

I already have a prototype or a tool of my own. What happens to it?

In the initial review we look at what can be carried over and where a clean rebuild is cheaper in the long run, whether it's Lovable, Bubble, Figma, Excel or an existing web app.

Who owns the code?

You do. It lives in your repository and your cloud accounts.

How many projects do you work on at once?

Two or three, so your app gets the attention it needs.

Do you work remotely?

Yes, from Bad Abbach near Regensburg, for clients across Germany. On-site meetings by arrangement.

06 — Contact

Let's talk about it.

Tell me what app you have in mind, send a link to your prototype, or describe the process that's causing friction today. I deliberately work with only two or three projects at a time, so your app gets the attention it deserves.

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Bad Abbach near Regensburg, Germany