Downdetector
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Opensignal - 5G, 4G Speed Test
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Network Analyzer
Jiri Techet
Speedtest di Ookla
GlassWire Data Usage Monitor
Domotz Inc
IMSO: server status monitoring
Maxence
Traffic Monitor & 4G/5G Speed
Treconite Apps
UptimeRobot: Monitor anything!
UptimeRobot
FIREPROBE Speed Test
V-SPEED.eu
Data Usage Manager & Monitor
FlavrApps