Technology
Posts about the stack, tools and patterns.
Your app disappeared from Google Play for new users? You haven't been banned — the API 36 deadline has passed
The Google Play deadline passed on 31 August 2026: updates must target Android 16 (API 36), and existing apps must target API 35 to stay available to new users. What exactly happened, how to check your targetSdk and how to request an extension to 1 November.
Will your app survive 2027? A 15-point checklist you can run yourself
A 15-point checklist you can work through yourself in a single afternoon: targetSdk, library versions, vulnerabilities, crash rate, ANR, build time, tests, store account ownership and signing keys. Includes scoring and the order to fix things in.
BLIK and the App Store and Google Play guidelines — when external payments are allowed
When you may settle with BLIK in an app and when the stores require In-App Purchase. The boundary between digital goods and the real world, the borderline cases, and how not to lose a build in review.
BLIK integration in a mobile app — how it works and what to choose
How to integrate BLIK in a mobile app: the payment flow step by step, direct integration versus going through an operator, the BLIK API, one-click and recurring payments, plus the most common implementation mistakes.
Payments in a Polish mobile app: BLIK, Przelewy24, Stripe and Apple Pay — what to choose and what the App Store demands
Digital content or the real world — the rule that decides which payment method you are allowed to use. BLIK, Przelewy24, Stripe, Apple Pay and IAP compared, what the DMA changed, plus a decision matrix and rollout checklist.
AI-written code in production — what we find most often in audits
Vibe coding has reached production. The patterns we find most often in audits of AI-generated code: missing input validation, committed secrets, N+1 queries and dead tests — with how to catch each of them.
Flutter vs React Native vs Kotlin Multiplatform in 2026 — which one when (and when to go native)
An honest comparison of Flutter, React Native, Kotlin Multiplatform and native development in 2026: performance, UI, code sharing, hiring — plus four decision questions that point to the right stack for your project.
KSeF 2.0 integration — how to connect your own system to the e-invoicing API
A practical guide to integrating with Poland's KSeF 2.0 e-invoicing API: authentication, sessions, the FA schema, status polling, UPO handling, idempotency and fallback modes — plus a rollout plan before the penalty-free period ends.
Mobile app for e-commerce — when it pays off and when a PWA is enough
Native app or PWA for your online store? Real differences, the iOS push problem, when each option pays off and how to decide on your own numbers: mobile traffic, purchase frequency and the role of notifications in revenue.
Got an idea?
Quote, consultation or audit — pick the path that fits. We'll take it from there.
Project quote
Tell us about your idea — we deliver scope, timeline and cost in 5 days.
Fill the brief→ 02Technical consultation
30-minute call with our tech lead about stack, architecture and risks.
Book a call→ 03Product audit
We review code, architecture and performance. Report with a clear roadmap.
Start an audit- Response within 24h
- NDA on the first call
- First call with no strings attached