Essential Android Apps for Network Engineers and Sysadmins

Your phone is the one device that's always with you, even on-call at 2am or in a data centre with no laptop. The right set of Android apps turns it into a capable network diagnostic toolkit. Here are the free apps that cover the most common sysadmin and network engineering workflows.

Remote Terminal Access: ShellPad

ShellPad is the foundation. SSH into any Linux server, router, or network device with a proper terminal emulator — not the fake text-box that other Android SSH apps pass off as a terminal. ShellPad runs vim, tmux, htop, and anything else you'd expect in a real terminal. Tabbed sessions let you keep multiple server connections open simultaneously.

Key features: private key authentication, TOFU host key verification with change detection, AES-256-GCM encrypted credential storage, and Telnet for legacy hardware.

Port Scanning and Network Discovery: ProbeKit

ProbeKit covers the network discovery side: port scanning, ping, whois, and local network information. When you're troubleshooting firewall rules or checking which services are running on a new host, being able to scan from your phone saves walking back to a laptop. The scan history feature means you can compare results over time.

DNS Diagnostics: DNSLens

DNSLens queries all DNS record types (A, AAAA, CNAME, MX, TXT, NS, SOA) across multiple resolvers simultaneously. This is invaluable after a DNS change: instead of waiting and wondering whether the new records have propagated, you can query multiple resolvers and see exactly what each one is returning. Propagation checks that used to require a desktop browser now take 30 seconds.

Uptime Monitoring: UptimeOwl

UptimeOwl runs background HTTP checks on your sites and APIs, sending push alerts when something goes down. Response time graphs help you spot degradation before it becomes an outage. Useful for monitoring services that aren't covered by your organisation's monitoring platform — internal tools, client sites, side projects.

Network Path Tracing: HopTrace

HopTrace runs visual traceroute and displays results hop by hop with RTT graphs. When traffic is slow or dropping, HopTrace tells you where in the path the problem is — your ISP, a transit provider, or the destination network.

Network Traffic Monitor: PacketPulse

PacketPulse shows active connections, per-app bandwidth usage, and traffic graphs. Useful for understanding what your phone is doing on a network, diagnosing connectivity issues at the application level, and spotting unexpected data usage.

REST API Testing: APIBench

APIBench is a mobile REST client with request collections, history, and a JSON response viewer. Handy for quickly testing API endpoints from the field without needing a laptop.

All of these apps are free, run offline for core functionality, and don't require accounts. They cover the toolkit for most common network and server management tasks from an Android device.