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From Thorlabs GmbH:
The Thorlabs Powermeter App is designed to remote control the PM160 series handheld optical power meters via Bluetooth connection. This application allows the user to read the optical power from a large needle gauge, supported by a 5 digit display with additional minimum and maximum readings. Further a configurable plot feature is available to collect, display and store data over time. Basic settings like wavelength correction and zeroing can be performed directly from your mobile device.The app requires a Bluetooth paired device.Supported Power Meters:- Thorlabs PM160- Thorlabs PM160T