openScale uses open source components. You can find the source code of their open source projects along with license information below.
I acknowledge and I am grateful to these developers for their contributions to open source.

Project: MPAndroidChart
Copyright 2018 Philipp Jahoda
Apache License, Version 2.0
License: https://www.apache.org/licenses/LICENSE-2.0
Website: https://github.com/PhilJay/MPAndroidChart

Project: SimpleCSV
Copyright 2017 Gray Watson
ISC License
License: https://opensource.org/licenses/ISC
Website: https://github.com/j256/simplecsv

Project: RxAndroidBle
Copyright 2016 Polidea Sp. z o.o
Apache License, Version 2.0
License: https://www.apache.org/licenses/LICENSE-2.0
Website: https://github.com/Polidea/RxAndroidBle

Project: CustomActivityOnCrash
Copyright 2014-2017 Eduard Ereza Martínez
Apache License, Version 2.0
License: https://www.apache.org/licenses/LICENSE-2.0
Website: https://github.com/Ereza/CustomActivityOnCrash

Project: Timber
Copyright 2013 Jake Wharton
Apache License, Version 2.0
License: https://www.apache.org/licenses/LICENSE-2.0
Website: https://github.com/JakeWharton/timber

Project: Low-Power
Copyright 2016 Lim Phang Moh
Creative Commons Attribution-ShareAlike 3.0
License: https://creativecommons.org/licenses/by-sa/3.0
Website: https://github.com/rocketscream/Low-Power

Project:  DS3232RTC
Copyright 2013 Jack Christensen
Attribution-ShareAlike 4.0 International
License: https://creativecommons.org/licenses/by-sa/4.0/
Website: https://github.com/JChristensen/DS3232RTC

Project: I2C_EEPROM & RunningMedian
Copyright 2015 Rob Tillaart
License: Released to the public domain
Website: https://github.com/RobTillaart/Arduino

Project: Arduino Time Library
Copyright 2009-2014 Michael Margolis
GNU Lesser General Public License 2.1 or any later version
License: https://www.gnu.org/licenses/
Website: https://github.com/PaulStoffregen/Time

Used icons are by flaticon.com (http://www.flaticon.com)
Attribution 3.0 Unported (CC BY 3.0)
License: http://creativecommons.org/licenses/by/3.0/
* Icomoon (https://www.flaticon.com/authors/icomoon)
* Google (https://www.flaticon.com/authors/google)
* Robin Kylander (https://www.flaticon.com/authors/robin-kylander) 
* Freepik (http://www.freepik.com)
* Scott de Jonge (https://www.flaticon.com/authors/scott-de-jonge)
* Cursor Creative (https://www.flaticon.com/authors/cursor-creative)
* Madebyoliver (https://www.flaticon.com/authors/madebyoliver)
* Those Icons (https://www.flaticon.com/authors/those-icons)
* Smashicons (https://www.flaticon.com/authors/smashicons)
* Swifticons (https://www.flaticon.com/authors/swifticons)
* Darius Dan (https://www.flaticon.com/authors/darius-dan)
* Pixelmeetup (https://www.flaticon.com/authors/pixelmeetup)

Contributors to openScale are listed on:
https://github.com/oliexdev/openScale/graphs/contributors