"Car back!"
The phrase every cyclist knows. The warning yelled down the pace line.
The thing you wish you'd heard before that pickup blew past your shoulder.
BikeTalk shouts it for you.
Pair any Bluetooth cycling radar and BikeTalk speaks approaching vehicles
through your headphones. No beeps to decode. No screen to glance at. Just
the words riders have been using since forever:
"Car back, 80 feet."
"2 cars, 60 feet."
"Wicked fast!"
"Clear."
ONE RADAR. EVERY PHONE IN RANGE.
This is the part no other app does.
• Riding solo? Your radar, your phone, your callouts.
• Riding with a partner or in a group? Only one rider needs to own a
radar. Every other phone in Bluetooth range hears the same callouts —
no pairing between phones, no setup. The rider at the front of the
peloton has the radar; everyone behind hears every car.
• Add the intercom and you can talk to each other too.
BikeTalk listens to the radar's open Bluetooth broadcast — read-only,
no configuration, no control. Any phone within range hears it.
GROUP INTERCOM
When you want to talk to your group, tap the mic or use your headphone's
play/pause button. Multiple riders can speak at once — it's a conversation,
not a walkie-talkie. Peer-to-peer over Bluetooth and Wi-Fi (the same
technology as AirDrop). No cell signal. No account. No server.
~60 metres line-of-sight.
Hands-free. Works with AirPods, Shokz, bone conduction, helmet speakers,
or any Bluetooth audio.
DESIGNED FOR YOUR POCKET
**BikeTalk is built to work from your pocket.** Drop your phone in your jersey, put on your headphones, and ride. Everything important comes through the audio — radar callouts, group chat, heart rate, time, weather. You don't need to look at your phone.
If you do mount your phone on your bars, even better — the screen below is the bonus view. But it's not required.
THE COCKPIT
The main screen is everything you'd put on a bike computer, sized for
glance-able reading at road speed:
• Heart rate — pair any standard Bluetooth HR strap
• Power and L/R balance — pair any standard Bluetooth power meter
• Speed, location, weather, route home
• Pass count, ride duration
• Big numbers, dark UI, designed for sunlight and motion
Phone on the bars or in your pocket. Either way, you're set.
SUPPORTED RADARS
Works with standard Bluetooth cycling radar tail lights, including
RTL515, RVR315, RCT715, eRTL615, RearVue 820, and Bryton Gardia.
CHOOSE YOUR VOICE
• Boston Cop (default) — "Wicked fast!"
• Boston Woman
• Neutral default
PRIVACY
No account. No sign-up. No tracking. No analytics. No ads. No
subscriptions. No in-app purchases. Audio between riders is peer-to-peer
and never recorded.
Free. Made by a cyclist in Boston who got tired of beeps.
SAFETY NOTE
This is a backup awareness layer. Always rely on your mirror, head-checks,
and head unit display first.
Privacy Policy: https://biketalk.app/privacy.html
Terms of Use: https://biketalk.app/terms.html
Ratings & Reviews
5.0
out of 5
1 Ratings
- Race Guidance (beta) — opt-in spoken coaching that paces you to a target power and heart-rate band with
simple "push / ease" cues, plus a projected finish time for your race. Turn it on in Settings → Race
Guidance.
- Sensor battery levels — see remaining battery for your heart-rate monitor and power meter.
- In-app ride export — copy or share your ride data from Diagnostics → Ride Log.
Improved
- Headphone buttons are more reliable for mute (and starting/stopping a race), including when you connect
headphones after opening the app.
- Background ride tracking — GPS keeps recording with your phone pocketed and the screen off, so distance
and route no longer freeze mid-ride.
- Settings reorganized — Operating Mode (Demo / Running / Pro) and Race Guidance now have their own menus.
- Power readouts round to the nearest 5 watts; pace and distance follow your Metric/Imperial setting.
Fixed
- "Alert on" can now be set to None.
Version 1.30
The developer, Digital Gemba LLC, 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 Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Digital Gemba, LLC
Size
37.2 MB
Category
Sports
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
Apple Vision Requires visionOS 1.0 or later.
Location
This app may use your location even when it isn’t open, which can decrease device battery life.