Journal

Notes
from the threshold.

What we learn at the border between idea and product: engineering, method, field decisions. Without needless jargon.

Featured·Product·8 min

iPhone Duo: should you adapt your app to the first foldable iPhone?

The iPhone Duo has been on sale since 23 October. What happens to your app if you do nothing, what Apple recommends, and how to decide whether the effort is worth it.

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Measuring how your app is used without spying on your users

Knowing which screens get used and where people drop off, without collecting more than you need. What EU law, the Belgian authority and the stores say, and how to go about it.9 min Product

Launching your app in 7 languages: ASO beyond translation

Translating an app’s listing is not enough to get it found. What the stores really read, why keywords do not translate, and what is special about Belgium.8 min Product

Adding social features to your app: the part nobody budgets for

Comments, profiles, follows: the button takes an afternoon to design. What the stores and EU law require around it, and what that does to the budget.8 min Engineering

Fixing a mobile app without waiting for store review

On the web, a fix ships in ten minutes. On mobile, it has to go through the stores. What their rules let you fix remotely, and the safeguards to put in place.7 min Product

Multilingual app: plan for it from the start, especially in Belgium

“We’ll translate later” is an expensive sentence. What a multilingual app takes beyond the text, and why Belgium leaves you little choice.7 min Guide

E-invoicing: does your business software speak Peppol?

Registered on Peppol, but your invoices still come out of an in-house tool as PDFs? What the 2026 mandate really changes for custom software, and how to integrate it properly.8 min AI

Your app was built by AI, and it no longer holds

The AI-generated prototype worked in the demo, then everything seized up in production. How to diagnose it, what to keep, and when you really need to start over.8 min Design

Digital accessibility: what the law really requires since June 2025

The European Accessibility Act has applied in Belgium since 28 June 2025. Who is concerned, what is required, the real deadlines, and why the 2030 date probably does not protect you.8 min Product

Mobile app price: what really moves the bill

What really drives the price of a mobile app, with realistic ranges and the factors that matter.9 min Guide

How to choose your software development studio

A decision guide for choosing a development studio on concrete criteria, without jargon.9 min Design

Design system: why and when to build one

Not a palette, not designer whim: why a design system matters, when to build one, and what it saves.7 min Product

Building an MVP: framing the right scope

The real risk with an MVP is not doing too little, but doing too much. How to frame the right scope.7 min Engineering

React Native development: which projects in 2026?

One base for iOS and Android: when React Native is the right call, and when native wins.8 min Infrastructure

Self-hosting or cloud, how to choose

Self-hosting or managed cloud: real costs, data, complexity. How to choose without dogma.7 min AI

AI in service of the product, not the reverse

How to tell AI that changes a product from gadget AI: rules or model, data, transparency and cost.8 min Product

Leaving Excel without breaking everything

Your spreadsheet is hitting its limits? Here is how to migrate smoothly without losing your data.7 min Engineering

Real time, what it really costs

Latency, queues, scaling: the real price of a real-time app, and when a refresh is enough.6 min Method

A product, never a demo

What separates a slick demo from a product that holds in production: reliability, tests, deployment, handover.8 min