STOP THE TIMER · MOBILE GAME · 2025
A viral timer duel, shipped in seven days
Tl;dr
I turned a TikTok and Instagram timer trend into a pocket-sized duel in seven days - designing and building the core loop, home hub, quick match, missions, avatars, and store story around one familiar moment: stop blind, miss by a hair, try again.
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In 7 days
Days from first sketch to store build
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6.00s
Stop blind on an exact second
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One tap
Hidden clock · instant rematch
Solution
Here are some of the key flows
Stop on the second. Don’t look at the clock.
A target time is set - 3 seconds, 6 seconds, whatever the round demands - but the running timer stays hidden. You tap stop when your gut says you’re there.
Home hub & quick match
Sessions needed to be short. Home puts quick match one tap away, with missions and rewards wrapped around the same loop so players have a reason to come back.
Illustration & avatars
The game is competitive, not serious. Illustrated avatars give players something to collect and show off - social energy even when the loop is just you versus the clock.
Overview
From viral mechanic to playable app
Stop the Timer is a mobile game I designed and built solo - born from the clips where friends huddle around a kitchen timer and try to stop on an exact second without looking.
I saw the trend, mapped the core loop, and shipped to the App Store in seven days - product design, UI, illustration direction, and development, end to end.
Problem
The trend was everywhere - the app wasn’t
As a designer, I recognized a simple gap - the trend was everywhere, but there was no pocket version.
The format depended on a physical setup: a timer, a table, friends in the same room. Comments kept asking for an app. Without one, the moment stayed locked to the video.
Initial findings
Across every clip, the same asks kept repeating
I treated comment sections like research. The pattern was consistent: people already understood the mechanic - they just couldn’t play it alone.
From the comments
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Stop at exactly six seconds without looking - that’s the whole video.
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We don’t have a timer at home but we still want to play this.
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Someone needs to make an app for this.
THE VIRAL MOMENT
Blind timing + loud reactions = content people already know how to share.
THE MISSING APP
Millions watched the trend - but couldn’t play it on the bus, in a queue, or against a stranger online.
THE REMATCH INSTINCT
The emotional hook is the near miss - one hundredth of a second creates the next round.
Goals
Make the viral mechanic playable in one tap
User goal
Ship before the trend cooled down
Business goal
Keep rounds short, tense, and repeatable
User goal
Wrap retention around one core loop
Business goal
Make the brand feel like the videos
User goal
Launch on App Store & Play with a clear store story
Business goal
Design process
Capturing the core loop
The product had to do one thing perfectly: recreate the feeling of stopping blind. Target time set, running timer hidden, tap when instinct says you’re there.
Closest to the target wins. Quick match against strangers, rematch with friends, repeat until someone nails it - just like the videos, but in your pocket.
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A physical timer, a table, and friends in the same room.
A hidden clock, target second, and one-tap stop on phone.
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A clip ends when the room reacts.
Quick match, missions, rewards, and avatars give the same moment a reason to repeat.
Store story
Store screens spell out the hook in seconds - blind timing, head-to-head play, bold STOP typography - so downloads know exactly what they’re getting.
Outcome
Impact after launch
Stop the Timer went from a trending clip format to a shipped iOS game in seven days - design, build, and store launch, solo.
It validated a simple thesis: when a social mechanic is already viral, the product doesn’t need to over-explain - it needs to feel identical to the moment people already love.
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In 7 days
Days to App Store, end to end
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Online match
Online quick match — play the trend against strangers anywhere
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System
Match · progression · avatars
Key lessons
My takeaways
Stay true to the feeling
Trends that already teach the mechanic are a gift - the product job is fidelity, not explanation. Match the feeling from the videos first; wrap features around it second.
Scope is speed
Shipping in a week meant ruthless scope: one loop, one tap, one reason to rematch. Everything else served that instinct.
Brand the verb
The brand had to feel like the videos: bold type, high contrast, zero ambiguity. STOP tells you exactly what you’re about to do.
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