SURVIVAL APPSMobile / Android
Native apps, from concept to deploy. Android · Capacitor · PWA.
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Item90: home supplies, room by room
Do you know what's in your pantry, how long it lasts and what's about to expire? Item90 is the Android app for planning home supplies, in '90s pixel style.
Offline maps: download them before the network is gone
Google Maps, Organic Maps or OsmAnd? What really works without internet, what doesn't, and how to prepare your phone in ten minutes, before you need it.
Your phone already knows how to call for help: turn these features on
Emergency SOS and emergency contacts are already built into Android and iPhone. Here's how to switch them on.
Three apps, three pillars of survival
BioRadar, EcoSurvivor and HotSummer share a common thread I only found afterwards: know nature, don't waste resources, face the extremes.
Ownership vs. Subscription
Why "publisher, not seller" doesn't mean "I don't sell": a reflection on one-time purchases, subscriptions, and what's still yours after you buy an app.
How to verify an APK before you install it
SHA-256 hash, VirusTotal reports and the signs to check before installing an APK from outside the Play Store — the routine I run on every release.
HotSummer, from concept to code
The extreme-heat app concept (Transmission 017) became HotSummer, on sale for 7.99 €: risk index, Pip-Boy alert, zero backend.
An App to Survive Extreme Heat
An app idea for extreme heat waves: not yet another weather app, but a tool that turns the alert into concrete, personalized actions.
BioRadar: a flora and fauna scanner built on the iNaturalist API (Expo + Capacitor)
How BioRadar is built: the Android app that turns the wildlife and plants around you into targets on a cyberpunk radar, with live data from iNaturalist.
€co-Survivor: Managing Your Finances Like a Survivor (React Native + Expo)
How €co-Survivor is built: an offline React Native + Expo budget app with a post-apocalyptic theme — reserves, rations, a survival index.
What the Digital Markets Act Means for Solo App Developers
The Digital Markets Act forced Apple and Google to allow alternative stores, sideloading and their own payments. What it means if you publish apps solo.
PWA, Capacitor or Native? A Conceptual Map Before You Choose (No Code)
Three ways to get an app onto a phone — PWA, Capacitor, native — a decision map of what each choice really costs you, without a single line of code.
Why publishing on Google Play has become so complicated for solo developers
Mandatory testers, identity checks, API requirements that keep changing: what to expect today when publishing your first app on Google Play on your own.