Apps like Signaller - Uptime monitoring

Here are some great alternatives to Signaller - Uptime monitoring by AR Generation :
IPLOGGER URL Shortener
IPLOGGER URL Shortener
★3.8
Site Monitor
Site Monitor
★3.6
Web Alert (Website Monitor)
Web Alert (Website Monitor)
★4.3
Trackify - Last Seen Tracker
Trackify - Last Seen Tracker
★3.6
Website Booster
Website Booster
★4.6
LinkWall: Anti-Phishing app
LinkWall: Anti-Phishing app
★4.6
Online tracker last seen
Online tracker last seen
★4.2
AT&T ETP Mobile
AT&T ETP Mobile
★4.2
Plink
Plink
★4.2
Getcaller
Getcaller
★3.7
Neighbors by Ring
Neighbors by Ring
★4.7
sysAdmin ToolBox
sysAdmin ToolBox
★4.2
zmNinja
zmNinja
★3.3
zmNinja-pro
zmNinja-pro
★4.4
Find Starlink Satellites
Find Starlink Satellites
★4.3
UptimeRobot: Monitor anything!
UptimeRobot: Monitor anything!
★4.0