GeoGebra
Interactive mathematics for all levels — geometry, algebra, calculus, statistics. Create dynamic constructions, share interactive visualizations. Free for students and teachers forever. Constructions stay dynamic, so dragging a point updates every dependent value and shows the relationship rather than one case.
Not sure how to add GeoGebra to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
Own GeoGebra? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.
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