I build stuff.

Hi, I'm Perttu, a developer and a designer. I've spent the last decade or so designing and building digital products.

From the blog

I write a lot, take a look at some of the most recent articles.

How to add subscriptions to a Bolt app

January 9, 2026•External

Learn how to monetize the app you created with Bolt using RevenueCat SDK and few lines of code.

Check if user has other iOS app installed in SwiftUI

December 13, 2025

Learn how to detect whether another iOS app is installed using SwiftUI and custom URL schemes. Example is from my Wayline app, opening Flighty to export flight data.

Throttling and memoizing App Store scraper calls

December 4, 2025

How to handle rate limits and memoization when scraping the app-store-scraper package.

How to make money with your Android app

December 2, 2025

Building a great Android app takes time, creativity, and persistence. But once your app is live, there's one question every developer eventually faces: how do I actually make money from this?

Work

Company
RevenueCat
Role
Senior Developer Advocate
Date
2025 Present
Company
Fenrir Digital
Role
Founder
Date
2021 2025
Company
Noice
Role
Senior Mobile Developer
Date
2023 2024
Company
Veri
Role
Product Lead
Date
2022 2023
Company
Mavericks
Role
Senior Software Engineer
Date
2021 2022
Company
Qvik
Role
Senior Software Engineer
Date
2019 2021
Company
Nyxo
Role
Co-founder
Date
2019 2021
Company
University of Helsinki
Role
Product Lead
Date
2018 2019
Company
Perfektio
Role
Co-founder
Date
2016 2018
Company
Nordea
Role
Analyst
Date
2015 2018
Company
Aalto University
Role
Research Assistant
Date
2014 2016