I am developing an app for Android and I am trying to find a fast and reliable charting library. After some searching, I found 4 libraries: AChartEngine, WilliamChart, HelloCharts and AndroidPlot. I need some up to date feedback about the performance and the stability of these libraries because all the information I could find was outdated.
You can use MPAndroidChart.
It's native, easy to use, fast and reliable.