Connected!
DOUBLE
BUMP
Meet. Bump. Remember.

Connect with people in the real world — just bump phones twice. No QR codes. No usernames. Just a physical moment.

Download on the App Store
How it works

Three steps.
One real connection.

1
Both open DoubleBump
You and your friend each tap into the Bump screen. That's it.
2
Tap phones together — twice
The double tap is both the gesture and the proof. BLE makes sure you're within 30 cm.
3
You're connected!
Screens glow yellow. Your connection is saved — forever on your map.
⚠   Both phones must be moving. One-sided won't work.
Features

Your real-world social map.

Every bump builds a permanent memory. See your connections, where you met, and every moment you've shared.

⚡
Bump to Connect
Double-tap phones together to create a real-world connection. No usernames, no follows — just a physical moment.
🗺️
Memory Map
Every bump pins a location on your personal map. Relive exactly where you met each person.
📖
Encounter Memory
Add a photo and a 100-character note to each bump. Private between you two — no public feed.
🔥
Relationship Levels
Stranger → Acquaintance → Friend → Close Friend → Best Friend → Soul Mate. Levels unlock as you keep bumping.
📡
Live Nearby Radar
See who around you has DoubleBump open before you bump. Bluetooth scans up to 2 m — you see a name, then you act.
🎮
8-bit Identity
Pixel-art animations. Retro font. Every interaction is tactile and playful — by design.
Security Model
Three layers. No spoofing.

A connection can only happen if all three layers pass simultaneously.

BLE
Proximity proof — Bluetooth RSSI must exceed −40 dBm (~30 cm). Remote spoofing is physically impossible.
BUMP
Intent proof — The double-tap gesture is required. A single accidental nudge will never create a connection.
MOTION
Shared event proof — Motion signatures from both phones are compared. Both devices must have experienced the same physical collision within ±400 ms.
Ready to bump?

Available on iPhone. Free to download.

Download on the App Store