Security
Read (boring): https://developer.android.com/about/versions/14/behavior-changes-14#runtime-receivers-exported
Used in Unit Converter to update currency rates. Requests are made only when you select a currency unit. See: CurrencyApiService.kt and UnitsRepository.kt
Used in Unit Converter as a callback. Retries to update currency rates if there was an error (no network, for example) and the Internet connection is back. See: NetworkUtils.kt and ConverterScreen.kt
Not used explicitly. Added automatically by Widget feature.
Not used explicitly. Added automatically by Widget feature.
Not used explicitly. Added automatically by Widget feature.
Non-free doesn't mean that you need to pay, put your credit card away. In this context it means that you can't host it on your machine (why the fuck would anyone want to host a currency API service?).
The app uses Free Currency Rates API by fawazahmed0.
Requests are send to cdn.jsdelivr.net.