Polar Sensor Logger

★★★★★ This app is great for anyone with a polar h10 strap and is curious about their heart rhythm. Not sure it has a practical purpose unless your an amateur or professional cardiologist, but it's really cool.

★★★★★ Awesome ECG, accelerometer and RR intervals logger for the Polar H10 sensor! It works amazingly well, and continues to work even when the screen is turned off (despite my phone being stringent on energy saving and usually closing everything it can, even instant messengers!). All the data is saved in realtime during the acquisition in separate CSV files with timestamps both in the filename and per row, and are stored in a sensorDataLog folder at the root of internal memory, hence even if the acquisition is prematurely stopped or the phone shuts down during the acquisition, the data is not lost. It only needs Bluetooth, so I could activate Plane mode and disable Localization to save on battery, after 1h30 of acquisition of both ECG and accelerometer it only used 1% of battery! There is just one thing that could make this app better: why not make it open source??? It's clearly geared towards research, it would be a very welcome addition to open the source to all researchers!

★★☆☆☆ Terrible app. No way to save or export data or graphs.

★★☆☆☆ Even though my Polar HRM and my phone were the only devices within Bluetooth range of me, the app refused to connect to the HRM, stating it was connected to another device. I had previously connected to my treadmill, but that was turned off at the time. And 40-50 m away... uninstalled.

★★☆☆☆ There is a bug with Save Data. Tried on many ways, but it always shows error message, so the Data could not be saved.

★★☆☆☆ It connected to my polar sensor, it showed my heart rate, no graph, no calorie calculator, what good is it. Not impressed

★★☆☆☆ Would not connect to my polar H₇. No matter how long is leave it to "seek sensor". Worked perfectly on few other apps.