I am a long time user of SciChart. The API is excellent, some very small flaws here and there like any other software application but even fine grained customization is offered and it just works most of the time. Performance is stellar. I think the only other product I tested with similar performance is Arction's Lightingcharts, however, and this is a biggy, Arction's documentation is horrible in comparison to SciCharts excellent sample suite and developer forum. Also, while Arction provides functionality similar to Scichart, the Arction product visualizations look crude, unappealing, color palettes are poorly done, and the overall finished product looks very awkward and like modern UI elements. Overall I can't recommend Scichart enough, caveat, I only use the WPF version, so I am unfamiliar with the iOS or Android versions. Matt Wolf