■ Speed Test
[1] cloudflare
https://speed.cloudflare.com/
　
[2] measurement lab
https://speed.measurementlab.net/
Googleで speed test で検索して出てくるやつのオリジナル
https://www.google.com/search?q=speed%20test
　
[3] Netflix
https://fast.com/ja/
　
[4] nperf
https://www.nperf.com/en/
　
みんな大好きOpenSignalのSpeed Testはアプリで
https://play.google.com/store/apps/details?id=meteor.test.and.grade.internet.connection.speed
https://play.google.com/store/apps/details?id=com.staircase3.opensignal
　
https://apps.apple.com/jp/app/meteor-speedtest-%E3%82%A4%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%8D%E3%83%83%E3%83%88%E9%80%9F%E5%BA%A6%E3%83%86%E3%82%B9%E3%83%88/id1292709222
https://apps.apple.com/jp/app/opensignal%E3%82%A4%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%8D%E3%83%83%E3%83%88%E9%80%9F%E5%BA%A6%E3%83%86%E3%82%B9%E3%83%88/id598298030