iOS usage over android (a tiny measurement)

On my site the 75% of traffic is about music sheet in pdf. I suppose is not biased towards an os. I wondered if iOS usage is indeed much higher than android as Apple and others are claiming. (short answer: Yes, but the trend maybe is changing)

Here is the statistics from my website. At first only mobile oses.
A look at desktop oses with mobile.
Let's return to the mobile (manufacturers)

and the last-one. Browsers.

Made in Linux :)

Hits: 4754

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