iTunes vs Quandl
Same instrument, two spec sheets — measured, not claimed.
iTunes vs Quandl: common questions
Which is more reliable, iTunes or Quandl?
On our scheduled checks, Quandl leads on measured uptime — iTunes at —% versus Quandl 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 iTunes and Quandl need an API key?
Neither needs a paid key — iTunes is callable with no signup, and Quandl is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call iTunes and Quandl from the browser?
Neither sends browser-friendly CORS headers reliably, so call iTunes and Quandl from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are iTunes and Quandl free for commercial use?
iTunes has unclear commercial terms, and Quandl 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.