An internet speed test with nothing in the way. One tap measures download, upload, latency, and jitter — then tells you what the numbers mean.
Coming SoonFree and fully unlocked. No ads, no account, no tracking.
For iPhone and iPad running iOS 17 or later.
Prism Speed Test measures your connection the way an engineer would and explains it the way a friend would. Every run records download and upload throughput, latency at idle and under load, jitter, and a bufferbloat grade — then turns those into plain verdicts for streaming, calls, gaming, uploads, and browsing. Everything it records stays on your device, in an unlimited history you can search, chart, export, or wipe.
Five metrics — download, upload, latency, jitter, and bufferbloat.
Unlimited history — on your device, with notes, stars, and trends.
Data Not Collected — no ads, no account, no analytics.
Download and upload throughput over multiple parallel connections, with a live graph so you can see how steady your line is — not just its peak.
Latency is measured at three moments: idle, during download, and during upload. The gap between them is bufferbloat — the thing that makes video calls stutter the moment someone starts a backup — and Prism grades it, along with jitter.
After every test you get plain-language verdicts for the things you actually do: 4K streaming, HD video calls, cloud gaming, large uploads, and everyday browsing. No guessing whether 38 Mbps is good.
Enter the speed your plan promises and every result shows what percentage of it you actually received. Test on Wi‑Fi, test on cellular, test at 8 pm and again at 8 am — the history is on your side.
Unlimited history stored on your device. Notes that save and stay saved, stars for the results you care about, Wi‑Fi and cellular filters, trend charts, CSV or JSON export, and a one-tap delete-all.
Run a 30, 60, or 120-second latency watch and see every spike on a live ping graph — perfect for finding out whether it's your Wi‑Fi or your provider that drops during calls.
Share any result as a tidy image card — good for sending to your provider's support desk, or to whoever keeps saying the Wi‑Fi is fine.
Ask Siri to "run a speed test", or add one to a Shortcut and get the result back as text. Built on App Intents, so it works wherever Shortcuts do.
No analytics, no advertising SDKs, no third-party code. Your results never leave your device unless you choose to share them. App Store privacy label: Data Not Collected.
Most speed-test apps are ad units with a gauge attached — and many quietly ship analytics and advertising SDKs alongside the test. Prism Speed Test has none of that: no ads, no account, no third-party code, and a history that lives on your phone rather than on someone's server.
It also measures the things that actually decide whether a call stutters — latency under load and jitter — and grades them, so you can tell the difference between a fast line and a good one.
Anyone who wants to know whether they're getting the speed they pay for, why the video call keeps freezing at 8 pm, or whether the new router made any difference. Enter your plan's promised speed, test over a few days, and you have a clean, exportable record to bring to your provider.
Measurements run against Cloudflare's global speed-test edge network, so the nearest test point is picked automatically in more than 330 cities. Like any speed test, the test server sees your IP address in order to send you data — and that is the only thing it sees. Prism Data Group receives nothing.
Your results never leave your device unless you choose to share them. Read the full privacy policy.
Questions, bug reports, or feedback about Prism Speed Test? Send us a note and we'll get back to you.