Add features comparison of weather providers

README.md

@@ -18,6 +18,22 @@ Clone this project and build it by AndroidStudio.
 You can select a specific build variants in AndroidStudio.
 There are 3 build variants now. Specifically, the `fdroid` variant dose not contain any closed source 3rd-party SDK, such as Baidu Location Service and Bugly. The `gplay` variant integrated the Google Play Service to improve accuracy of location. And finally, the `public` variant contains all closed source 3rd-party SDK which is not exist in `fdroid` version except the Google Play Service.
 
+### Features comparison of weather providers
+
+AccuWeather is the most complete provider, however you may sometimes find other providers to be more accurate for your location.
+
+| Providers | AccuWeather | OpenWeatherMap | Météo-France |
+| --- | --- | --- | --- |
+| Status | Maintained | Not maintained anymore (version 3.0 requires credit card information) | Maintained |
+| API key | Optional | Required (must be compatible with version 2.5) | Optional |
+| Country supported | Worldwide, some features not available everywhere | Worldwide, some features not available everywhere | Mostly France, including DROM-COM. AQI restricted to Auvergne-Rhône-Alpes |
+| Current | Weather, Temperature, Precipitation, Wind, UV, Air Quality, Humidity, Pressure, Visibility, Dew point, Cloud Cover, Ceiling | Weather, Temperature, Precipitation, Wind, UV, Air Quality, Humidity, Pressure, Visibility, Dew point, Cloud Cover | Weather, Temperature, Wind, UV, Air Quality |
+| Yesterday | Temperature | Not available | May be available in the future |
+| Daily | Weather, Temperature, Precipitation (Rain, Snow, Ice), Precipitation Probability (Thunderstorm, Rain, Snow, Ice), Precipitation Duration (Rain, Snow, Ice), Wind, Cloud Clover, Sunrise/Sunset, Moonrise/Moonset, Moon phase, Air Quality, Pollen, UV, Hours of sun | Weather, Temperature, Precipitation (Rain, Snow), Precipitation Probability, Wind, Cloud Clover, Sunrise/Sunset, Air Quality, UV | Weather, Temperature, Precipitation (Rain, Snow), Precipitation Probability (Rain, Snow, Ice), Wind, Cloud Clover, Sunrise/Sunset, Moonrise/Moonset (may be available in the future), Moon phase, Air Quality, UV, Hours of sun |
+| Hourly | Weather, Temperature, Precipitation (Rain, Snow, Ice), Precipitation Probability (Thunderstorm, Rain, Snow, Ice), Wind, UV | Weather, Temperature, Precipitation (Rain, Snow), Precipitation Probability, Wind, UV | Weather, Temperature, Precipitation (Rain, Snow), Precipitation Probability (Rain, Snow, Ice), Wind |
+| Realtime | Weather, Rain, Cloud Cover | Not available | Rain (intensity estimated, not available everywhere) |
+| Alerts | Yes (duplicate alerts issue) | Yes | Yes (incorrect phenomen time to be fixed) |
+
 ### Weather icon extensions
 If you want to build your own weather icon-pack, please read this document:
 * [IconProvider-For-GeometricWeather](https://github.com/WangDaYeeeeee/IconProvider-For-GeometricWeather)