Developer · Author · Notetaker
I ship apps,
then write down how — before I forget.
I’m Craig Grummitt, a freelance iOS and mobile developer. I build utilities, games, and writing tools people actually use — and keep a public notebook of the Swift, Flutter, and platform oddities I bump into along the way.
A few things I’ve shipped
Subtitles Viewer
Real-time subtitles for cinema, TV, and streaming. Objective-C → Swift, plus Android in Java.
370k+ downloads · 4.2 ★ · 2014–
Pretty Dictionary
A dictionary that’s actually nice to look at. Built in SwiftUI with definitions, examples, and pronunciations.
SwiftUI · 2026–
Music Vibes
Play or record a melody and feel it through haptic vibrations — music as bone conduction.
4.4 ★ · AudioKit · Core Haptics · 2019–
Rhymer’s Secret
A rhyming dictionary with the extra bits writers actually want. One of a family of word tools.
68k+ downloads · 4.5 ★ · 2019–
Book and course
iOS Development with Swift
A Manning book for experienced developers getting their head around iOS — Swift, adaptive layout, data, networking, and shipping to the App Store. Prefer watching? There’s a companion video course too.
Latest from the notebook
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SwiftUI vs React Native: Binding vs Props
SwiftUI vs React Native: Binding vs Props Following on from my previous article comparing SwiftUI and React Native, I want to look…
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SwiftUI vs React Native: State
If you’ve spent time developing apps with SwiftUI, one of the first things you’ll notice when moving to React Native is that…
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Why Didn’t Anyone Tell Me About TypeScript?
When I stopped working in ActionScript 3 (AS3) twelve years ago to move into mobile app development, I had no idea how…