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• iOS devices with iOS 11 or later
• Android mobile devices with Bluetooth 4.0 capability and Android 5 or later
(check full phone specification from your phone manufacturer)
There is plenty of variation between how different Android devices handle the
technologies used in our products and services, such as Bluetooth Low Energy
(BLE) and different standards and protocols. Because of this, compatibility varies
between phone manufacturers, and unfortunately Polar cannot guarantee that all
features can be used with all devices.
Water resistance of Polar products
Most Polar products can be worn when swimming. They are not, however, diving
instruments. To maintain water resistance, do not press the buttons of the device
under water. When measuring heart rate in water with a GymLink compatible Polar
device and heart rate sensor, you may experience interference for the following
reasons:
l Pool water with high chlorine content, and seawater are very conductive. The
electrodes of the heart rate sensor may short-circuit, preventing ECG signals
from being detected by the heart rate sensor.
l Jumping into water or strenuous muscle movement during competitive swim-
ming may shift the heart rate sensor to a location on the body where ECG sig-
nals cannot be picked up.
l The ECG signal strength is individual and may vary depending on the indi-
vidual’s tissue composition. Problems occur more frequently when measuring
heart rate in water.
Polar devices with wrist-based heart rate measurement are suitable for swimming
and bathing. They will collect your activity data from your wrist movements also
when swimming. In our tests, however, we found that the wrist-based heart rate
measurement doesn’t work optimally in water, so we cannot recommend wrist-
based heart rate measurement for swimming.
