The motorsport reaction time trainer that helps you practice, improve, and compete — right from your pocket.
Download on the App StoreFeatures
From casual practice to structured training programs, Lights Out! adapts to your skill level and goals.
Five lights illuminate one by one, then extinguish at a random moment — just like a real motorsport standing start.
Five rapid-fire rounds with automatic advancement. Measure your average reaction time and consistency under pressure.
Progressive difficulty that gets harder with each successful reaction. How many levels can you clear?
Race against your personal best with a live elapsed timer. Real-time pressure to beat yourself every round.
Challenge another player in real-time via Game Center. Same light sequence, same delay — fastest reaction wins.
A unique challenge every day with a fixed seed. Everyone gets the same delay — compare on a level playing field.
Structured multi-day programs designed to systematically improve your speed, consistency, and focus.
Track trends, distribution charts, time-of-day performance, fatigue analysis, and percentile rankings.
Choose from multiple light colors — Classic Red, Neon Blue, Green, or Amber — to personalize your experience.
How It Works
Get practicing in seconds with an intuitive flow that mirrors real motorsport starts.
Tap anywhere on the screen to begin the light sequence.
Five red lights illuminate one at a time, roughly one second apart.
After a random delay, all five lights go out simultaneously.
Tap as fast as you can. Your reaction time is measured in milliseconds.
Pricing
Start for free. Go Pro to unlock all modes, competitive ranks, and detailed analytics.
Free forever
Just $0.83/mo — save 58% vs. monthly
Full Pro access, cancel anytime
Pay once, Pro forever
Compete
Pro subscribers earn a competitive tier based on their rolling 20-round average. How high can you climb?
Starting tier. Average above 330 ms. Everyone begins here — master the basics.
Average under 330 ms. You're getting fast — sharper than most casual players.
Average under 270 ms. Serious reflexes. You'd hold your own on the grid.
Average under 220 ms. Elite reaction speed. Only the dedicated reach this tier.
Average under 180 ms. Legendary. You react faster than most professional drivers.
Train Smarter
Proven techniques drivers use to sharpen their reflexes.
Tension slows you down. Keep your finger loose and hovering close to the screen — don't tense up.
Instead of staring at one light, let your eyes softly focus on the entire cluster. You'll detect the change faster.
The random delay is designed to defeat prediction. React to the visual change — never time the rhythm.
10–15 rounds per session is optimal. Fatigue degrades performance after that — track it with the Pro fatigue chart.
Your first 2–3 reactions are usually slower. Use Sprint Mode as a warm-up before going for a PB.
A steady 250ms beats alternating between 180ms and 400ms. Aim for tight spread — that's what wins races.
FAQ
For most people, 200–300 ms is good. Competitive racers aim for 150–200 ms. Under 150 ms is exceptional. Pro subscribers see their global percentile ranking.
Your rank is calculated from the rolling average of your most recent 20 reactions. Bronze starts at 330+ ms; Diamond requires under 180 ms. The rank updates automatically and appears on the main screen for Pro subscribers.
No. Existing Premium and Ultra Premium purchases are automatically grandfathered into Pro. You keep full access forever without needing to subscribe.
All three unlock identical Pro features. Monthly ($1.99/mo) bills monthly. Yearly ($9.99/yr) bills annually and saves 58%. Lifetime ($14.99) is a single one-time purchase that never renews.
Every Monday at midnight UTC. Submissions throughout the week appear on the global Pro leaderboard via Game Center.
Yes. All single-player modes work fully offline. Only 1v1 Multiplayer requires an internet connection.
You're anticipating rather than reacting. Try to relax and wait for the lights to actually go out. The random delay is specifically designed to prevent prediction.
The complete user guide with all modes, settings, and strategies is available at userguide.html.
Legal
Effective date: May 21, 2026
This Privacy Policy describes how Lights Out! Reaction Trainer ("the App", "we", "us", or "our") handles your information. We are committed to protecting your privacy and being transparent about our data practices.
We do not collect, store, or transmit any personal data to external servers.
All data generated by the App — including reaction times, statistics, settings, and training progress — is stored locally on your device using Apple's standard on-device storage mechanisms (UserDefaults). This data never leaves your device except in the following cases:
The free version of the App displays advertisements provided by Google AdMob. Pro subscribers (Monthly, Yearly, or Lifetime) do not see ads and are not subject to any ad-related tracking.
ATT Prompt on First Launch. In accordance with Apple's App Tracking Transparency framework, the App will display a system prompt the first time you launch it, asking for your permission to use your device's advertising identifier (IDFA) for ad personalization. You will see two options:
Your choice has no effect on app functionality or features, and it can be changed at any time in Settings > Privacy & Security > Tracking. The App never tracks you for purposes unrelated to advertising, and all ad-related data sharing is disabled entirely for Pro subscribers regardless of your ATT choice.
For details on how Google AdMob handles data, see Google's Privacy & Terms.
To improve the App, we use the following privacy-respecting services:
These services are operated by Google. Data collected is used solely to operate and improve the App; it is not sold or shared with advertisers. For details, see Firebase's Privacy Information.
If you have opted in to sharing analytics with Apple at the OS level, Apple may also collect anonymized usage data as described in their privacy policy.
All app data is stored locally on your device. Your data is protected by your device's built-in security features (passcode, Face ID, Touch ID). We do not have access to your data at any time. If you delete the App, all locally stored data is permanently removed.
The App does not knowingly collect any personal information from children. Since no personal data is collected from any user, the App is safe for use by individuals of all ages.
The App integrates with the following services:
Apple services are operated by Apple Inc. and governed by Apple's Privacy Policy.
Since all your data is stored locally on your device, you have full control over it at all times. You can:
We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated effective date. Continued use of the App after changes constitutes acceptance of the revised policy.
If you have any questions or concerns about this Privacy Policy or the App's data practices, please contact us at:
Support
Having trouble with the app, in-app purchases, or have a feature request? We're happy to help.
Email us at bushels-70.mail@icloud.com
Common solutions:
• Subscription not active? Try "Restore Purchases" from the paywall or Settings.
• Multiplayer not working? Make sure you're signed in to Game Center in Settings.
• App not responding? Force-close and reopen the app.