Is DoubleBump safe from remote spoofing?

Yes. DoubleBump requires three simultaneous verifications: Bluetooth proximity within 30 cm (physically impossible to fake remotely), a double-tap gesture confirming intent, and matching motion signatures from both phones within ±400 ms confirming a shared physical event.

What are the relationship levels in DoubleBump?

DoubleBump has six relationship levels that unlock as you keep bumping: Stranger, Acquaintance, Friend, Close Friend, Best Friend, and Soul Mate.

Yes. DoubleBump is free to download on the App Store for iPhone and on Google Play for Android.

What is the Live Nearby Radar feature?

Live Nearby Radar uses Bluetooth to detect other DoubleBump users within approximately 2 meters. You can see their name before initiating a bump — useful in crowded or busy environments.

Does DoubleBump need an internet connection to bump?

The bump itself happens over Bluetooth — no internet is required at the moment of connection. An internet connection is used to sync your Memory Map and connection history.

What are Encounter Memories in DoubleBump?

Encounter Memories let you attach a photo and a 100-character note to each bump. These memories are private between you and the other person — there is no public feed.

Connected!

DOUBLE
BUMP

Q: Does DoubleBump work between iPhone and Android?

Yes. DoubleBump uses Bluetooth Low Energy Manufacturer Data for cross-platform detection, allowing iPhone and Android users to bump with each other.

Meet. Bump. Remember.

Connect with people you actually meet — just bump phones twice. No QR codes. No usernames. Just a physical moment.

App Store Google Play

How it works

Three steps.
One real connection.

Both open DoubleBump

You and your friend each tap into the Bump screen. That's it.

Tap phones together — twice

The double tap is both the gesture and the proof. BLE makes sure you're within 30 cm.

You're connected!

Screens glow yellow. Your connection is saved — forever on your map.

⚠ Both phones must be moving. One-sided won't work.

Showcase

See DoubleBump in action.

Meet in real life — connect with people you actually meet, face to face.

Bump twice — double bump your phones and become friends instantly.

Save every memory — remember where and when you first met on your Memory Map.

Grow your friendship — meet again, bump again, and level up from Stranger to Soul Mate.

Features

Your real-world social map.

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

👋

Meet in Real Life

Connect with people you actually meet — face to face. No usernames, no follows, no algorithm.

⚡

Bump Twice

Double bump your phones and become friends instantly. The double tap is the gesture and the proof in one.

🗺️

Save Every Memory

Remember where and when you first met. Every bump pins the place, date, and time on your Memory Map.

📖

Encounter Memory

Add a photo and a 100-character note to each bump. Private between you two — no public feed.

🔥

Grow Your Friendship

Meet again, bump again, and level up together — from Stranger all the way to Soul Mate.

📡

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.

The App

A closer look inside.

Bump Screen

See who's nearby and bump twice to connect — no QR, no search.

Live Feed

Every bump and new connection, pinned to where it happened.

Connection Profile

Bump stats, friendship progress, and each person's shared links.

DoubleBump friendship level ladder from Stranger to Best Friend.

Friendship Levels

Climb from Stranger to Best Friend as your bumps add up.

Your Profile

Your bump stats, personal Bump Map, and the links you share.

Bump Map

A timeline map of every meeting — dates, places, and notes.

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.

FAQ

Frequently asked questions

How does DoubleBump work?

Both users open DoubleBump and tap their phones together twice. Bluetooth Low Energy confirms you're within 30 cm. Motion sensors verify both devices felt the same physical impact within 400 ms. The double-tap confirms mutual intent. All three checks must pass simultaneously — accidental bumps and remote spoofing are both impossible.

Does DoubleBump work between iPhone and Android?

Yes. The cross-platform BLE protocol is live — iPhone and Android users can bump with each other. DoubleBump uses Bluetooth Manufacturer Data to detect cross-platform devices reliably.

What happens after I bump someone?

Both screens glow yellow and you feel a haptic response. The connection is permanently saved on your Memory Map with the location where you met. You can add a photo and a 100-character note (Encounter Memory) to capture the moment. No feed, no algorithm — just your private map.

What are relationship levels?

Six levels unlock as you keep bumping the same person: Stranger → Acquaintance → Friend → Close Friend → Best Friend → Soul Mate. Levels persist forever and keep building with every bump.

Can someone fake a DoubleBump connection remotely?

No. Remote spoofing is physically impossible. BLE proximity requires being within 30 cm. The motion signature must match within 400 ms of a real physical collision. Without actually being there and physically tapping phones, none of the three layers can pass.

Is DoubleBump free?

Yes. DoubleBump is free on iOS and Android. Locked profile details of non-connected users can be unlocked by watching a short rewarded ad.

Ready to bump?

Free on iOS and Android.