DR vs OctetLab

DR-NetTools is a focused, no-bloat toolkit for engineers, network admins and power users who need real diagnostics on the go. Run a fast Ping, measure packet loss with MTR, trace a path across the public internet, scan a local subnet for live hosts and dig into DNS — all from a single, polished app. Tools included: • Network diagnostics: Ping, Hosts in range, Network Map, Host Monitor, TCP Ports, Wake on LAN, Speed Test • Addresses & domains: DNS, Reverse DNS, DNS Propagation, GeoIP, Whois, mDNS / Bonjour service discovery • Traceroute: Traceroute, MTR • Remote services: SSH client with built-in terminal, SSL / TLS certificate inspector • Calculators: IPv4 Subnet Calculator, IPv6 Calculator, IPv6 Subnet Divider • Current Status: public IP, interfaces, gateways, DNS resolvers — all in one glance Full IPv6 support — paste any literal address (including bracketed forms with a port) directly into any tool. No reformatting required. Designed for clarity: every screen shows technical-level output without burying it in marketing copy. iPhone and iPad share the same polished glass UI with read-through blur and clean monospaced typography for results. No accounts. No personal data sold or shared. An optional Pro upgrade unlocks unlimited results, removes ads and supports development. Built by DR-Online for engineers who actually use these tools daily. Privacy Policy: https://www.dr-online.pl/privacy_policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

OctetLab is a subnet calculator built for network engineers, sysadmins, and students who need answers in seconds, not spreadsheets. Enter an IPv4 or IPv6 address and instantly see the network address, broadcast address, usable host range, and subnet mask — broken down bit by bit in a visualizer you can tap to reshape the mask boundary by hand. Every calculation runs fully on-device: no accounts, no network calls, no ads. INCLUDED • Instant IPv4 subnet calculator with a tap-to-toggle binary bit visualizer — see and shape the mask boundary directly • Full IPv6 subnet support, including compressed and expanded address forms • Copy any result field or share a full subnet summary in one tap • Save your recent calculations to a running history PRO (ONE-TIME UNLOCK) • VLSM subnet splitter — divide a network into right-sized subnets by host count • Unlimited saved calculation history • Export subnet plans to CSV OctetLab does one job well: turning subnetting math into a clean, tappable interface — no lookup tables, no guesswork. Terms of Use (EULA): https://obelisk.club/subnetmaskcalculator/terms