The COROS app is where you’ll review activities, change watch settings, build routes, monitor training and connect other fitness apps.

1. Download the COROS app from the Apple App Store or Google Play.
2. Open the app and create a COROS account or sign in.
3. Turn on your watch by holding the bottom-right Back/Lap button for two to three seconds.
4. Select your preferred language. A QR code will appear on the watch.
5. Open the COROS app and select the Profile tab at the bottom of the screen.
6. Select Add New Device and scan the QR code displayed on your watch.
7. Confirm the pairing code on both your phone and watch.
8. Follow the app’s prompts to select your wearing hand, notification preferences and other settings.

If the QR code doesn’t work, select Pair via Bluetooth underneath the scanner

Set Up Safety Alerts

COROS Safety Alerts allow you to share live tracking information and manually send an SOS notification to selected emergency contacts during outdoor activities.

In the COROS app:

1. Open the Profile page.
2. Scroll down and select Safety Alerts.
3. Turn Safety Alerts on.
4. Add up to three emergency contacts.
5. Turn on Auto Email if you want your contacts to automatically receive a live-tracking link when you begin an outdoor activity.

To manually send an SOS from the watch, press and hold the designated button for seven seconds, then press the dial to confirm. Review the instructions shown in the COROS app so you know which button to use before you need it.

Your watch must remain connected to your phone through Bluetooth, the COROS app must be running in the background and your phone must have cellular service. COROS Safety Alerts notify your selected contacts but do not contact 911 or emergency services for you.

• Download the COROS app.
• Pair your watch.
• Complete any available firmware updates.
• Review your personal information and heart-rate settings.
• Set up your emergency contacts and Safety Alerts.
• Customize your activity screens.
• Connect Strava or other training apps.
• Record and sync your first activity.

Connect Strava and Other Apps

COROS can automatically share completed activities with supported training platforms.

In the COROS app, select:

Profile → Settings → Third-Party Apps → Data Sync

Choose the service you want to connect and follow the sign-in instructions. Available connections may include Strava, TrainingPeaks and other supported platforms.

Complete this connection before your next activity so newly recorded workouts can sync automatically.

Get to Know the Buttons

Digital Dial—Top Right

• Scroll to move through menus and data screens.
• Press to select an option.
• Press during an activity to pause or resume.
• Hold the dial when prompted to finish and save an activity.

Back/Lap Button—Bottom Right

• Hold to turn on the watch.
• Press to return to the previous screen.
• Press during an activity to record a lap.
• Hold to open the Toolbox menu.

Action Button—Bottom Left

• Press during daily use to activate the backlight.
• Customize its function during activities through the watch settings.

Your watch may automatically lock to prevent accidental button presses. Hold the digital dial until the green lock symbol completes to unlock it.

Record Your First Activity

1. Go outside with a clear view of the sky.
2. From the main watch face, press the digital dial.
3. Scroll to Run or another activity and press the dial to select it.
4. Wait for full GPS signal bars and a solid heart icon.
5. Press Start.
6. During the activity, turn the dial to view your different data screens.
7. When finished, press the dial to pause.
8. Scroll to Finish, then press and hold the dial to save.
9. Open the COROS app and swipe down on the home screen to sync your activity.

Waiting for a strong GPS signal before pressing Start will help improve the accuracy of your route, distance and pace.

COROS uses your recent activities and personal information to help you understand your training. Give the watch time to learn about you—the information becomes more useful as you consistently record activities.Some running metrics require enough qualifying activity data before they appear. To initially unlock Running Fitness, Race Predictor, VO Max and threshold estimates, COROS generally requires a continuous outdoor run of at least 25 minutes at a sufficient heart-rate intensity. You can also complete the guided Running Fitness Test to establish or recalibrate these measurements. Not all of these metrics are include in every COROS watch.

Training Load

An estimate of how much stress a workout placed on your body. Longer or more intense activities generally create a higher training load.

Recovery

An estimate of how prepared your body may be for additional training based on your recent activity and recovery patterns.

Running Fitness

An overall estimate of your current running ability, with separate scores for endurance, threshold, speed and sprint. These measurements can help you recognize strengths, follow changes in fitness and determine which types of training may need more attention.

Threshold Pace and Heart Rate

Estimates of the effort you may be able to sustain during challenging running. These numbers can help COROS personalize training zones and workout recommendations.

Overnight HRV

Heart-rate variability measured while you sleep. Wear the watch consistently at night to establish your personal baseline. COROS generally needs about five nights of data before displaying an assessment.

Use these measurements as training tools—not medical diagnoses. Look for trends over time instead of reacting to one unusual reading.

Training Status

Shows how your recent training compares with your longer-term fitness through three measurements:

• Base Fitness: Your accumulated training load over the past 42 days.
• Load Impact: Your accumulated training load over the past seven days.
• Intensity Trend: Compares recent training with your established fitness to indicate whether you may be decreasing, resuming, optimizing, ready to perform or training excessively.

Race Predictor

Provides estimated race times and paces for the 5K, 10K, half marathon and marathon based on your recent training. Different workouts may affect each race-distance prediction differently.

VO Max

An estimate of the maximum amount of oxygen your body can use during exercise. It provides another way to follow changes in aerobic fitness over time.

Running Fitness Breakdown

In addition to an overall Running Fitness score, COROS evaluates four areas:

• Endurance
• Threshold
• Speed
• Sprint

This can help identify the types of running where you are strongest and where additional training may be useful.

Efficiency Score

Compares the relationship between your pace and heart rate during a run with your recent training history. Heat, hills, fatigue, sleep and other factors can influence the score, so it is most useful for recognizing trends rather than judging one run.

Training Effect

Evaluates how a workout affected your aerobic and anaerobic fitness. The score can range from a recovery-level effort to an overreaching workout.

Training Focus

Identifies the primary purpose or benefit of a completed run. COROS may classify the activity as:

• Easy
• Base
• Tempo
• Threshold
• VO Max
• Anaerobic

Personalized Training Zones

COROS creates personalized heart-rate and pace zones based on your estimated threshold values. These zones can help you select the appropriate effort for recovery runs, endurance training, tempo efforts, threshold workouts and intervals.

Troubleshooting

My Watch Won’t Pair

• Confirm that Bluetooth is enabled.

• Make sure your phone has an internet connection.

• Confirm the pairing code on both the phone and the watch.

• Restart your phone.

• Turn Bluetooth off for 30 seconds and turn it back on.

• Select Pair via Bluetooth if the QR code doesn’t work.

My Activity Isn’t Syncing

• Keep the watch near your phone.

• Confirm Bluetooth is on.

• Open the COROS app and swipe down on the home screen.

• Make sure the COROS app is allowed to run in the background.

• Check that both the app and watch firmware are current.

Notifications Aren’t Appearing

• Open COROS app → Profile → PACE 4 → Notifications.

• Confirm that notifications are enabled for the desired apps.

• Review your phone’s Bluetooth and notification permissions.

• On Android, make sure battery optimization isn’t preventing the COROS app from running in the background.

GPS Is Taking Longer Than Expected

• Sync the watch with the COROS app before your activity.

• Move outdoors with a clear view of the sky.

• Remain still while the watch locates satellites.

• Wait for full GPS bars before pressing Start.

Need Some Help?

New technology can take a little time to learn. If you purchased your COROS PACE 4 from Run Away Shoes and need help getting started, bring your watch and phone into the store. Our team will help you get connected and find the settings that make sense for your activities and goals.

The COROS Heart Rate Monitor connects through Bluetooth and automatically turns on when it detects that it is being worn.

Pair It With the COROS App

1. Charge the heart-rate monitor before using it.
2. Place it on your arm or cover the optical sensor with your finger. Flashing green lights indicate it is awake and ready to pair.
3. Open the COROS app.
4. Select the Profile tab.
5. Scroll down and select Accessories.
6. Select Add or Add New.
7. Choose the COROS Heart Rate Monitor when it appears and confirm the connection.

Once added to the COROS app, the monitor should automatically appear in the accessory list of your connected COROS watches. 

Confirm the Watch Connection

On your COROS watch, go to:

System → Accessories → Added List → COROS Heart Rate → Connect Now

Before starting an activity, wait for the small heart icon to become solid. This confirms that the watch is receiving heart-rate data.

How to Wear It

Wear the monitor:

• On your upper bicep, between the bicep and shoulder muscle
• Snugly enough that it doesn’t slide
• Directly against your skin
• Away from dense tattoos when possible

It can also be worn on the forearm, but COROS recommends the upper bicep for the best results.

Using It During a Workout

Once paired, simply put the monitor on before starting your activity. Its wear-detection sensor should wake it and automatically reconnect to your watch.

The monitor cannot record an activity by itself. It must remain connected to a compatible watch, bike computer or fitness app because it does not contain GPS or onboard activity storage.

Pairing With a Non-COROS Device

1. Wear the monitor to activate pairing mode.
2. Open the device’s sensor or accessory menu.
3. Search for nearby Bluetooth heart-rate sensors.
4. Select the COROS Heart Rate Monitor.

The monitor uses Bluetooth only and does not support ANT+. Device compatibility should be confirmed before pairing. support.coros.com

Care and Charging

• An orange light means the monitor is charging.
• A green light means it is fully charged.
• Remove the sensor from the band before washing the band.
• Rinse the sensor and band with fresh water after sweaty workouts.
• Allow everything to dry before charging or wearing it again.

If the monitor isn’t detected, make sure its green lights are flashing, toggle Bluetooth off and back on, and confirm that you selected Accessories rather than Add New Device in the COROS app.