SimpleTimer: Stopwatch & countdown timer app

It started with a hair product’s packaging and ended as SimpleTimer, a minimal stopwatch and timer app stripped back to nothing but circles and simplicity, from early concept sketches through to its own landing page.

Trio of smartphone mockups displaying three distinct operational states: active countdown, default timer reset, and custom 15-minute selection.

Inspiration can come from anywhere or a physical object

SimpleTimer is a minimal stopwatch and timer app, no account required, nothing to configure, just rotate a dial and go. This one started with a search that went nowhere. Every timer app I found online was either overly complex or wanted me to create an account just to set a countdown. After striking out, I noticed the lid of a hair product sitting nearby and thought I could use that shape as inspiration and a starting point.

Top-down view of a red Dominate Rok Waxx hair container on a wooden surface, highlighting the circular notch layout that inspired the app UI design.

10-minute sketches, then refine the strongest one

I challenged myself to come up with as many different concepts and variations within 10 minutes. From there I refined a few and chose the design I thought had the most potential to push further.

Paper wireframe sheet showing three hand-drawn UI concepts—circular dial, rotary slider, and stacked pyramid—with design notes and annotations.

A simple idea I’d been thinking about doing for a while

When I first had the idea to use elements from the hair product design I had no idea how it would turn out. By timeboxing yourself to 30 minutes to test an idea, you can explore different directions without wasting too much time.

Side-by-side product comparison showing the circular Dominate Rok Waxx tub alongside the SimpleTimer mobile interface inspired by its tactile design.

Design with the absolute minimum

I was looking through the App Store for a simple timer, though couldn’t find anything that did exactly what I wanted, so I decided to design one myself. On this screen you rotate the hour and minute sliders to where you want them and press start. Simple.

Default mobile timer interface featuring '00:00' digital display with 'H' and 'M' sliding indicator handles along a circular track for duration setting.
Clean mobile screen displaying a pre-set timer of '00:15' minutes with highlighted pink 'H' and 'M' sliders ready to press 'START'.

Jenga Design: Removing all unnecessary UI elements

When the timer is running, the hour and minute sliders disappear as they are no longer needed and to prevent accidental interaction. Minimal design is challenging, you have to keep asking yourself “Is this element really needed?”

Active countdown screen displaying a digital readout of '00:07:30' inside a circular progress dial with 'PAUSE' and 'RESET' control buttons.
Mobile app notification screen showing a pop-up alert box with 'Timer complete' and an 'OK' button over the dimmed dark UI background.

Continuing the simple theme with a minimal website

I created a single webpage to help promote the app and hopefully increase downloads. No logo, no navigation, no footer. Just the app.

Promotional landing page showing the tagline 'A simple timer which let's you quickly and easily set a reminder...' alongside App Store download buttons and phone mockup.

What staying simple actually took

Staying this simple took more discipline than it looks like from the outside. Every screen ships with a small pull toward adding one more setting, one more option, in case someone somewhere wants it. This one just didn’t get that treatment.

Close-up of a person tapping an Apple Watch wearing a white sports band, displaying a '15:00' countdown dial during a workout.
Hand holding an iPhone at a desk displaying the SimpleTimer UI set to '00:15' minutes to show real-world ergonomic usability.

The sliders disappearing the moment the timer starts is probably the clearest example. Nothing left on screen that isn’t doing something right now. The Jenga metaphor holds up well here too, pull a piece, see if it still stands, and if it does, that piece probably didn’t need to be there in the first place.

That same instinct shaped PaperCraft too, a minimal design challenge followed all the way through without ever really needing to be, just because it was worth seeing where it landed.