All your climbing on your wrist.
Leave your phone in your bag.
Log routes and boulders, track your heart rate, and manage rest intervals directly from your watch. Fully integrated with Garmin Connect IQ and coming soon to Wear OS by Google.
* Note: Apple Watch devices are currently not supported.
Key Advantages
Built by and for indoor climbers
Distraction-Free Logging
No more chalk-covered screens. Choose your grade or sector, tap to log an attempt, and stay completely focused on your next send.
Heart Rate & Rest Timers
Monitor your heart rate and effort zones between boulders. Built-in automatic rest timer ensures you take the optimal break before your next attempt.
Automatic Cloud Sync
Once you finish your session on your watch, your sends are uploaded directly to your C4 Indoor profile and marked on your gym’s route map.
Platforms
Choose your watch & get connected
Tailored applications according to your smartwatch operating system.
Garmin Connect IQ
C4 Garmin Watch
Our native wearApp for the Garmin Connect IQ platform. Compatible with over 40 Garmin models (Fénix, Forerunner, Epix, Venu, Instinct, and more). Log sends, track cardio, and upload sessions to C4 Indoor instantly.
- Real-time heart rate tracking
- Log boulders and routes without touching your phone
- Direct Bluetooth sync with your account
Google Play
C4 Wear OS
The C4 experience arrives on Google's Wear OS platform. Compatible with Samsung Galaxy Watch (series 4, 5, 6, 7 & Ultra), Google Pixel Watch, Xiaomi Watch, and other smartwatches powered by Wear OS 3, 4, and 5.
- Optimized for circular screens on Wear OS 3+
- Seamless integration with the Android app on Google Play
- Instant pairing with 4-letter unique code
Step by Step
Pair your watch in 3 easy steps
No complicated setup. Everything is synced in seconds.
Install the App
Download C4 Indoor from your watch's app store (Garmin Connect IQ or Google Play Store).
Get Your Code
Open the app on your wrist. You’ll see a unique 4-character code (e.g., ABCD).
Pair on C4
Go to your C4 Indoor profile, click "Do you have a smartwatch?", type the code, and you're set.
FAQ
Frequently Asked Questions about Smartwatches
Which watch models are supported?
Garmin devices are supported through Connect IQ (Fénix, Forerunner, Epix, Venu, Instinct, and more). The Wear OS edition (Samsung Galaxy Watch, Google Pixel Watch, etc.) is in its final development stages. Apple Watch devices are currently not supported.
Do I need to carry my phone while climbing?
No. You can record all your attempts, rest times, and heart rate directly from your watch. Once you finish your session and return to your phone, your data automatically syncs with your C4 Indoor account.
Is there any fee to use the smartwatch app?
No, the smartwatch application is completely free for any registered C4 Indoor climber.
Take your climbing to the next level
Start logging sessions from your wrist and unlock real indoor climbing analytics.
Access C4 Indoor →