A false rejection and an edit-mode bug hiding in the background

Apple rejected the app under 2.5.4 — ‘unable to play audio in the background’ — but the code was right all along; the reviewer just never pressed Play. Plus a sneaky sequel to yesterday’s edit-mode fix: the invariant broke the moment you backgrounded the app.

June 12, 2026 · 4 min · Karl-Ernst Kiel

App Store rejection, IAP debugging, and a pile of small iOS fixes

The app came back rejected for an unresponsive IAP button. Tracking it down led through four separate bugs in the purchase flow, plus a handful of smaller fixes: edit mode not exiting on play, background audio sync, and a haptics regression on iPhone 15 Pro.

June 11, 2026 · 4 min · Karl-Ernst Kiel

Raising the free tier, fixing a BPM glitch, and setting up a new machine

A small but meaningful update: the free tier now allows 50 songs and 5 playlists. Plus a Compose LaunchedEffect fix for a BPM sync issue when adding the first song to a new playlist. And some notes on getting back up to speed on a new Mac.

June 4, 2026 · 4 min · Karl-Ernst Kiel

First batch of beta feedback fixes

Eight items from the first round of beta feedback, in one focused day. A subtle Compose race condition that broke Feel-the-Beat, a rename of “Special Entry” to “Break”, per-playlist rename via a 3-dot overflow menu, an in-library New Song affordance, a system-nav clipping fix, a restructured top-bar menu, and the first version of an Edit Sound screen with live frequency and tone control plumbed all the way down to the Oboe callback.

April 27, 2026 · 9 min · Karl-Ernst Kiel