SubnetBuddy vs Socketta

SubnetBuddy is a fast, offline subnet calculator and network planning tool built for IT professionals, network engineers, students, and anyone studying for their CCNA, CompTIA Network+, or just needs to crunch CIDR notation on the fly. No internet required. No ads. No account needed. Just open the app and start calculating. SUBNET CALCULATOR • Enter any IP address and CIDR prefix (e.g. 192.168.1.0/24) • Instantly see network address, broadcast address, first and last usable host • View total hosts, usable hosts, and wildcard mask • Get the next sequential subnet with one tap • Supports all prefix lengths from /0 to /32 MASK CONVERTER • Convert between CIDR notation, dotted decimal, and binary • Enter a prefix length and see all three formats instantly • Quick-reference for common subnet masks • Perfect for exam prep and on-the-job lookups VLAN PLANNER • Plan multiple VLANs with custom names and sizes • Set a base network and SubnetBuddy calculates non-overlapping subnets for each VLAN • See network range, gateway, CIDR, and host count per VLAN • Great for designing office networks, lab environments, and homework assignments IP VISUALIZER • Enter a CIDR block and see a visual map of the IP address space • Color-coded grid shows used vs. available addresses • Instantly understand how big (or small) your subnet really is • Tap any cell to see the full IP address TERMINAL-STYLE DESIGN • Dark theme with VibeCMD's signature hacker-green aesthetic • Monospace fonts and command-line inspired interface • Clean, distraction-free layout built for speed • Easy on the eyes during late-night study sessions WORKS COMPLETELY OFFLINE • Zero network calls — all calculations happen on-device • No account required — open and use immediately • No data collection — your network plans stay on your phone • Lightning fast — results appear as you type BUILT FOR REAL PEOPLE • IT professionals doing quick subnet math on-site • Students studying for CCNA, Network+, or any networking exam • Homelab enthusiasts planning their network segments • DevOps engineers carving up VPC address spaces • Anyone who's tired of Googling "what is /22 in dotted decimal" SubnetBuddy is a utility tool for network address calculations. It does not connect to or scan any networks.

See who's on your Wi‑Fi, check your network's security and keep a speed history — plus a full network bench. Everything is worked out on your device. No ads, no account, no tracking. WHO'S ON YOUR WI‑FI • Finds the devices on your network and names them from what they announce (Bonjour, UPnP, NetBIOS, web pages) and from your router's DNS: name, maker, model and type. A device that announces nothing is shown by its address • Changes since the last scan: devices that appeared and devices no longer seen SECURITY CHECK • A read-only check of your router and devices: reachable remote-login, file-sharing, screen-sharing and camera services, ports forwarded from the internet (UPnP), an admin page without HTTPS, DNS that answers for names that don't exist, and certificate validation • A score and grade, what each finding means, and what was and wasn't checked. It checks network settings — it is not a virus scan, and it never logs in or changes anything MEASURE • Speed test (Cloudflare): download, upload, latency, jitter and loss, kept with your provider's name, looked up on your device • TCP ping to any host and port (not ICMP), batch ping, a path check showing the destination's network operator, quality score and network diagnosis SCAN & DEVELOPER BENCH • LAN scanner (every host that answers a TCP probe), topology map, port scanner, DNS lookup, mDNS and UPnP browsers, scan diff, SSL viewer, WHOIS, HTTP headers, subnet calculator • HTTP/REST client with cURL/Postman import and code generation, WebSocket, MQTT, UDP/TCP, precision send, BLE central & peripheral, macros, profiles, schedules (while Socketta is open), export HONEST NOTES • iOS doesn't let apps read MAC addresses; devices are recognized by name, UPnP identity or address. Devices that answer nothing (phones asleep, firewalled PCs) can be missed • Socketta doesn't have Apple's multicast permission, so the UPnP browser asks each address directly and Wake-on-LAN sends to the device's IP address; some devices can't be found or woken this way • Ping is TCP: a closed port counts as loss. Local-network features need the Local Network permission. The speed test and the certificate check contact Cloudflare, and the DNS check asks your network's own DNS about two made-up names; nothing is sent to us FREE & PRO Free: unlimited device identification, changes since the last scan, 20 remembered devices on one network, the security score with every finding explained, speed test with the last 10 results, and the scanning and network tools; advanced tools have trial uses and a daily send allowance. Pro adds: alerts when a device never seen on that network before joins (while Socketta is open, or from the "Check This Network" Shortcuts action), a trusted list, device names and history, unlimited devices on every network, the device, port and step-by-step fix for each finding, re-check history and a report, the full speed history with a time-of-day chart and CSV export, and the advanced tools without limits. Weekly, monthly or annual subscription (free trial for new subscribers: 7 days on annual, 3 days on monthly and weekly) or a one-time lifetime purchase, charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends; manage them in Settings > Apple ID > Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://revot.jp/apps/netmaster/privacy.html Provider data: IP to ASN Lite by DB-IP.com (CC BY 4.0).