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ip.app vs IsItWater

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

APIip.appNEW—IsItWaterNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ip.app vs IsItWater: common questions

Which is more reliable, ip.app or IsItWater?

On our scheduled checks, IsItWater leads on measured uptime — ip.app at —% versus IsItWater at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do ip.app and IsItWater need an API key?

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

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

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

Are ip.app and IsItWater free for commercial use?

ip.app has unclear commercial terms, and IsItWater 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.