A record of
what answered.
Keep a local endpoint watchlist, run TCP connection checks and compare measured results with a saved baseline.
Give support a readable note with timestamps, port states, DNS results and your own context.
A changed TCP response stays tied to its exact IP and port. A different check scope is identified separately.
Save measured JSON, TCP CSV, readable support text and SHA-256 checksums through Android Files.
Only the checks you request
Use up to 32 private, link-local or loopback IPv4 targets and 12 TCP ports. An optional hostname is resolved on Android’s default network. The app retains up to 30 inspections and stops active checks when you leave it.
Understand the result
This is not ICMP ping, whole-LAN device discovery, signal measurement, security scoring or vulnerability testing. A timeout does not prove that a device is offline. IP addresses are not stable device identities. Screens shown here were captured from actual controlled test-network checks.