Real Net Speed vs OctetLab

The measurement has no set end: it runs until you stop it. This is not a few-second test, it is a monitor. BOTH DIRECTIONS AT ONCE Download and upload have independent controls. With both directions on at the same time, download drops. That is the network in real use, not its capacity — to measure capacity, run one direction at a time. SEVERAL SERVERS, IN PARALLEL It measures against several servers at once. Your device picks which, by each one's latency before starting — and the number of servers grows while that keeps improving the rate. The screen shows how much each one is delivering. THE NUMBER SAYS WHERE IT CAME FROM The number comes from the shortest valid window, and the screen says which: 10 s, 1 min or 5 min. On a slow link the window has to be longer for the number to mean anything. YOU CHOOSE WHERE TO MEASURE Automatic or a specific country, with favourite servers that always take part. A MEASURED ZERO IS A MEASUREMENT A measured zero is a measurement, not an error. If the connection drops mid-run, the chart shows the zero and measuring continues: the drop is part of what is being measured. WHAT IT COSTS IS IN PLAIN SIGHT On mobile data this eats your allowance fast, because it does not stop on its own. The app asks before measuring off Wi-Fi, and the counter on each card shows what was measured. After each measurement a technical record is sent to improve the meter — with no account, no device identifier and no IP address of yours. Details in the privacy policy. No sign-up and no ads.

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