What I've Made

Native mobile app

Live on the App Store

SweatShift

A customizable HIIT workout timer — idea to App Store.

SweatShift home with Ready. Shift. Sweat. branding and Quick Start presets for 30 Minute Workout, EMOM, and HIIT. — Home / Quick Start

SweatShift custom timer with Work, Rest, and Total duration controls. — Custom timer

SweatShift HIIT ready screen showing READY?, a 0:20 countdown, 0:20 work and 0:10 rest, and Start. — Ready

SweatShift active workout screen showing GO HARD!, a 0:59 countdown, and rest is next. — Active workout

SweatShift home with Ready. Shift. Sweat. branding and Quick Start presets for 30 Minute Workout, EMOM, and HIIT. — Home / Quick Start

SweatShift custom timer with Work, Rest, and Total duration controls. — Custom timer

SweatShift HIIT ready screen showing READY?, a 0:20 countdown, 0:20 work and 0:10 rest, and Start. — Ready

SweatShift active workout screen showing GO HARD!, a 0:59 countdown, and rest is next. — Active workout

The Idea

A native mobile timer built around interval training — work, rest, repeat — without turning a workout into a spreadsheet.

What I Made

A customizable HIIT workout timer, built as a native app and published on the App Store.

How It Works

Interval workouts with work and rest timers
Presets for getting started quickly
Custom timing when a preset isn't the point
Audio cues so you can keep your eyes off the screen

Technology

React Native and Expo, typed in TypeScript, with EAS and Apple distribution as the path to the App Store.

React Native
Expo
TypeScript
EAS
Apple distribution

How this case study will grow

The case study arc is Problem → Idea → Build → Testing → App Store. Sections will fill in as those stages are ready to tell honestly.

Public links (live site, App Store, GitHub) will appear here when they exist. They are not invented for this first version.

Let's Make Something

Got something you've been wanting to build?

Tell me about it. It doesn't need to be completely figured out yet.

Let's Make Something