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ip.app vs What3Words

Same instrument, two spec sheets — measured, not claimed.

APIip.appHEALTHY100What3WordsHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms76391
P95 · ms2761181
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ip.app vs What3Words: common questions

Which is more reliable, ip.app or What3Words?

Both are neck-and-neck — ip.app and What3Words each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, ip.app or What3Words?

ip.app has the lower median latency in our checks — ip.app responds in 76 ms versus What3Words at 391 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do ip.app and What3Words need an API key?

ip.app needs no key, while What3Words requires a free API key. If you want to start calling without signup, reach for ip.app first.

Can I call ip.app and What3Words from the browser?

Only ip.app is browser-friendly — it returns CORS headers over HTTPS. What3Words needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ip.app and What3Words free for commercial use?

ip.app has unclear commercial terms, and What3Words has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.