Comparison Polar OH1 vs Polar H10

— Wrist. Worn on the wrist like a traditional watch, many models of these devices closely resemble electronic watches. This method of attachment is highly convenient, especially for heart rate monitors, as the device sits directly on the skin, allowing for easy integration of pulse sensors. However, for pedometers, wrist mounting has drawbacks due to various vibrations affecting accuracy. To compensate, devices require intricate accelerometer calibration or the use of a GPS module, both influencing the device's cost.

— Forearm. Placing the sensor on the forearm (parts of the arm from the elbow and above) is both easier and less inconvenient. However, the distance of the sensor from the heart can affect the accuracy of the measurement. Therefore, most of the cardio sensors are made exactly on the chest (see paragraph above).

— Chest. Secured on the chest with a specialized belt, this method positions the device close to the heart, ensuring highly accurate heart rate tracking. However, devices with this setup typically lack displays as checking them would be inconvenient. This configuration is exclusively employed in cardiac sensors (see "Type").

— Neck. Traditionally, these devices are attached to a cord or ribbon for wearing around the neck. While this is the standard method, many models offer versatility,...allowing them to be placed in a pocket. Some devices in this category are not designed for cord attachment at all and are somewhat loosely classified. Pedometers are commonly found in the "neck" device category.

— Shoes. Positioned on the upper part of shoes, typically where lacing is found in classic sneakers, this method is convenient for pedometers, ensuring accurate step tracking. However, it may not be compatible with all shoes, and using certain functions can be challenging, requiring bending over or removing the device to interact with the display. As a result, this option hasn't gained widespread popularity.

— Fastening with a clip. Featuring a universal clip or "clothespin" in its design, this allows the device to be easily attached to the edge of clothing, such as a belt, collar, or pocket. Common in classic pedometers (see "Type"), these devices don't require direct contact with the skin during operation. The clip attachment method is more versatile than mounting on shoes and, for some users, is even more convenient than wearing the device around the neck or on the wrist/shoulder.

There are models that have several purposes — usually, these are devices on wrist, supplemented with alternative options (for example, a clip).

Mobile operating systems that the device is compatible with.

Many modern heart rate monitors, pedometers and heart sensors(see "Type") can be connected to a smartphone or tablet to process the collected data in a special application. Such applications provide a wide variety of possibilities that would be difficult or impossible to provide in the device itself. However, for the gadget to work properly with a smartphone or tablet, it must be compatible with the corresponding mobile OS.

Today, the market is dominated by two "OSes":

— Android. Developed by Google, this system is embraced by a range of manufacturers, from industry giants like Samsung and Asus to lesser-known Chinese brands. The diversity of devices running on this OS is vast, as is the array of system versions, proprietary interfaces, and firmware. Therefore, when selecting a device to pair with an Android smartphone or tablet, it's advisable to ensure compatibility between the specific devices in question.

— iOS. Exclusive to Apple's portable devices — iPhone smartphones, iPad tablets, and iPod touch media players — the proprietary operating system is consistent in its lineup. Regular and widespread OS updates ensure seamless compatibility between fitness gadgets and iOS devices. Compatibility concerns arise mainly with outdated or hacked ("jailbreak") system version...s or older Apple devices (3 years or more).

Data transfer standards supported by the device.

— Wi-Fi. Originally designed for computer networks and internet access, Wi-Fi is now commonly used for direct communication between devices, notably in fitness devices. While internet connectivity is possible, it's typically for specific tasks like firmware updates or saving data to network storage. The prevalent Wi-Fi version, 802.11n, theoretically offers a communication range of up to 100m indoors and 200m in open areas (though real-world figures are more modest). Newer generations boast even greater ranges. Wi-Fi modules are essential in various portable electronics like smartphones and tablets, but it tends to be less power-efficient compared to Bluetooth and ANT+.

— Bluetooth. Developed as a universal standard for direct device-to-device connectivity, Bluetooth technology comes in several compatible versions. The latest version, Bluetooth 4.0, offers a connection range of up to 100m and incorporates a low-energy communication standard, making it more energy-efficient than Wi-Fi. This efficiency is especially beneficial for compact electronics like heart rate monitors and pedometers with limited space for a sizable battery. However, Bluetooth modules are somewhat less common than Wi-Fi, with certain tablets and laptops lacking support. This is a consideration when selecting a model with this data transfer method.

— ANT+. Designed specific...ally for sports equipment and remote control applications, ANT+ is a low-power wireless transmission technology. It facilitates connections between heart rate monitors or pedometers and various devices, including exercise machines, smartphones, and tablets. For devices with USB On-The-Go support, communication is possible through a special adapter. Higher-priced models may have built-in ANT+ support, eliminating the need for additional equipment.

The device has the capability to connect to a PC, typically through a wired USB interface. This connection serves an auxiliary role, occurring outside of workout sessions, such as between workouts. It is utilized for various purposes, including saving collected data on a computer, adjusting settings, updating firmware, etc. The specific functionalities depend on the model of the heart rate monitor or pedometer.