Independent studio · the Netherlands

Small apps for the problems I kept running into.

Zatech is one developer. I make small iPhone apps for everyday problems, mine, or ones people tell me about. Right now that's Presence, an app that listens to how you rehearse and tells you the one habit worth fixing before the next take.

2020first app shipped
NLbuilt in the Netherlands

The app

Meet Presence.

The one I'm building for right now.

Presence app icon
In the App Store

Presence

Hear how you actually sound.

Records your pitch, mock interview or wedding toast and scores your pace, pauses, fillers and intonation, then names the one habit worth fixing before the next take. Everything is analysed on the phone, so no recording of your voice ever leaves it.

On-deviceNo accountiPhone & iPadiOS 26+
Mock Interview, Round 2
4:12 · Yesterday
82
Strong delivery
Pace82
Pauses74
Fillers61
Intonation38

The workshop

What I'm working on next.

I build one thing at a time, so this list stays short. It changes whenever an idea turns out to be worse on a phone than it was on paper.

A new app, navigationIn progress

How I build

Four rules I don't break.

01

One problem per app

If a feature doesn't serve the single thing the app is for, it doesn't ship. Small apps are the only ones a solo developer can actually finish.

02

Privacy first

Nothing asks who you are, and nothing is collected that the app doesn't need to do its job. What happens on your phone stays there.

03

Feedback reaches me directly

Every suggestion lands in one inbox and is read by the person who writes the code. A good idea can be in the next release.

04

Worth the space on your phone

If an app doesn't earn its place on a home screen it shouldn't be there. No clutter, no upsells, no features nobody asked for.

Who's behind it

Hi, I'm the whole studio.

I'm Maarten, a senior iOS developer in the Netherlands. Zatech is the name on the apps I build in my spare time.

They all come from the same place: an everyday problem I ran into myself, or one somebody told me about. If I can picture using it, I build it.

Feedback is the part I like most, and the appreciation people send back is what keeps me shipping. Something broken? Tell me and I'll look. Got an idea I haven't thought of? I want to hear that too, either way, one inbox, read by the person who writes the code: support@zatech.nl.

Got a problem worth an app?

I'm always collecting them. Tell me what you keep working around.