Why MSPs use iPerf3 instead of a generic speed test
Generic speed tests (Speedtest, Fast.com) measure the path from a device to a public server. That's useful for confirming an ISP is delivering its contracted bandwidth, and useless for everything else. When a client says 'my Wi-Fi is slow' or 'the network is fine in the office but terrible upstairs,' the bottleneck is almost always the LAN, not the WAN. iPerf3 measures only the LAN segment you care about: phone to NAS, laptop to switch, AP to AP. That isolates the problem to a single hop instead of dumping a single end-to-end number on you. For an MSP billing by the hour, that distinction is the difference between an hour of guessing and a five-minute diagnosis.
Site verification with the app, step by step
A typical MSP visit ends with the tech walking out and the customer wondering whether anything got better. With a phone-based iPerf3, the verification step takes a few minutes and produces hard numbers. Bring up Server mode on a small device (Mac mini, M-series MacBook, Android tablet) plugged into the client's switch. From a phone, run client-mode tests in each room the customer mentioned. Save each session with a meaningful name: 'Reception desk', 'Conference Room 2', 'Owner office'. Export the CSV at the end. You now have a one-page report you can attach to the ticket or send to the customer. If the customer escalates, the data is there.
Pricing and per-seat economics
The iPerf3 Client & Server app is a one-time purchase per device. There is no per-tech subscription, no MDM-only enterprise tier, no annual renewal. If your shop has six technicians, you buy six copies and you're done. Compared to the recurring license cost of dedicated network testing tools (NetSpot, Ekahau, Hamina), that's a single-digit dollar amount per tech per year amortised over a five-year device lifecycle. For shops that primarily handle SMB customers, where the depth of a full Ekahau survey isn't billable, that pricing model usually fits better than enterprise tooling.
