WhenRedTap
A tool to practice agility.
Only for iPhone
Free · In‑App Purchases
iPhone
4.0 is here: Lights Out, the Stopwatch pack, a global Daily Challenge and 20 badges — timed from the exact frame the light appears. Cheetah or sloth? Find out.
Remember racing friends on a digital watch? Red Light Reflex turns that into a set of reaction games: tap the instant the screen turns green and find out how fast your nerves really are.
SEVEN MODES, UNDER A MINUTE EACH
• Green Light — wait on red, tap on green. Average of 5 rounds.
• Stop or Go — tap on green, hold back on red and yellow.
• Bubble Pop — the whole grid lights up. Pop every light.
• Lights Out — five red lights go out. Launch like an F1 driver.
• Stopwatch · Quick Split — start, stop, as fast as you can.
• Stopwatch · Exactly 1.00 — stop at exactly one second. The digits vanish after half a second.
• Stopwatch · Tap Burst — how many taps in 5 seconds?
DAILY CHALLENGE
One mode a day, the same random sequence for everyone in the world, first try only. Keep your streak and see where you rank.
HONEST TIMING
Measured from the frame the light actually appears to the moment your finger touches down, with 120 Hz ProMotion support. Waits are truly random — no rhythm to guess — and anything under 100 ms is a false start.
LEADERBOARDS AND BADGES
• Game Center leaderboards plus a daily board; weekly and monthly boards in the app
• 20 badges to collect
• Challenge friends directly on iOS 26
• React to other players’ scores with an emoji
AND MORE
• Six tiers: Overclocked, Lightning, Cheetah, Sharp, Human, Sloth
• Skins: classic traffic lights or a retro seven-segment LCD
• Light and dark mode
• Share cards for your best results
Green Light, Stop or Go and the Daily Challenge are free forever. Other modes can be bought one by one, or played free for 30 minutes after watching an ad. Pro unlocks every mode and skin — including future ones — with no ads.
Terms of Use: https://redstop.netlify.app/terms
Privacy Policy: https://redstop.netlify.app/privacy
Ratings & Reviews
Red Light Reflex 4.0 is a complete rebuild:
• New modes: Lights Out and the Stopwatch pack (Quick Split, Exactly 1.00, Tap Burst); Whack-a-mole is now Bubble Pop
• Global Daily Challenge with a streak calendar
• 20 Game Center badges, plus friend challenges on iOS 26
• New leaderboards: weekly, monthly and all-time, with emoji reactions
• More precise timing, measured from the frame the light appears, 120 Hz supported
• Retro LCD skin, dark mode and share cards
Everything you bought in 3.x — Remove Ads and the Whack-a-mole unlock — carries over.
The developer, 泽 王, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 泽 王
- Size
- 6.2 MB
- Category
- Entertainment
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $0.99
- Paid Unlock $0.99
- Red Light Pro $2.99
- Lights Out $0.99
- Retro LCD Skin $0.99
- Stopwatch $0.99
- Copyright
- © 2026 wz
