Falstad Circuit Simulator on new websites

1. Falstad Circuit Simulator did not appear on any new site in the last 30 days.^[1]

The line is the 7-day average share of new sites that use Falstad Circuit Simulator, over the last 86 days. It starts at our first detection. The shaded area was measured against a different set of sites, so the line can step there without Falstad Circuit Simulator itself changing.^[2]

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Moodle	<0.1%	32.9%
2	–	Scratch	<0.1%	4.1%
3	▲1	CTFd	<0.1%	3.3%
4	▲12	Udemy	<0.1%	3.1%
5	▼1	GeoGebra	<0.1%	2.9%
…
64		Falstad Circuit Simulator	<0.1%	0.3%

All-time shares across the new sites we track: of all of them, and of the sites using any Education tool. All 287 in Education

3 of the 4 sites using Falstad Circuit Simulator are product launches we list individually. The other 1 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts.

Site	Found	Also detected
学谱 AI | 数学与物理学习助手 xuepuai.com · Education	Aug 31
HardwareAI Circuit Lab hardware-ai.org · Taiwan	Aug 31
Archloop — Close the loop from idea to architecture archloop.io	Aug 29

The StackScope API serves all 4 sites using Falstad Circuit Simulator, filterable and exportable, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.