Eter — Internet Radio
A native app for streaming internet radio stations on Apple platforms.
macOS
iOS
tvOS
watchOS
Swift • SwiftUI
Krystian Kozerawski
Indie Swift developer
I’m an indie developer building my own apps and also shipping products with the team at Apparent Software.
Team @ Apparent Software
Apps I’ve created, co-created and develop with the team at Apparent Software
Calm My Dog — Separation Anxiety Training
A daily training companion to help overcome separation anxiety in dogs.
iOS
Cashculator: Personal Finance
I also contributed to implementing some features of this great app for budgeting, income, and expense tracking with forecasting.
macOS
Socialite: Frame Your Photos
An app to add stickers, frames and effects to photos. No longer developed.
iOS
Independent releases
Apps I publish independently
My Prompt Tester
A simple free app for macOS 26 and iOS 26 to test prompts and instructions for Apple Intelligence (Foundation Models), copy them, and save with iCloud/CloudKit sync.
macOSiOS
Pass & ID Photo
An iOS app for quickly creating passport and ID photos to the EU standard (35 × 45 mm).
iOS
Focus Pebble
Timers for macOS and iOS. Create custom timers and keep an archive of completed sessions with iCloud (CloudKit) sync.
macOSiOS
Negative
A very simple PDF reader for macOS with a color-inverting filter.
macOS
Get in touch
I’m always happy to chat about Swift, SwiftUI, and app ideas. The fastest way to reach me is by email.