Amazon appears to be tracking every tap on Kindle
One of the selling points for Kindle is that if you switch devices partway through (e.g. switch from reading on your tablet to reading on your phone, or switch from reading the ebook to listening to the audiobook in your car), it remembers what page you&#x27;re on, so you can resume exactly where you left off.<p>Amazon actively touts this &quot;Whispersync&quot; feature in their marketing.  (From the Kindle product page: &quot;<i>With Whispersync, switch from Kindle to the Kindle app without losing your place (requires Wi-Fi).</i>&quot;) One would presume that Amazon achieves this by tracking whenever readers tap the screen to advance to the next page.  (And having a timestamp for that tap matters for resolving merge conflicts.)<p>Also worth noting that in the case of Kindle Unlimited (Amazon&#x27;s &quot;Netflix for ebooks&quot; program), authors get paid per page read.  (If a person reads the first 5 pages of your book and drops it, the author gets paid less than if they read the whole thing.)  One of the things that Amazon has to deal with is fraud prevention, to detect when authors are finding ways to game metrics: <a href="https:&#x2F;&#x2F;techcrunch.com&#x2F;2018&#x2F;06&#x2F;11&#x2F;notorious-kindle-unlimited-abuser-has-been-booted-from-the-bookstore&#x2F;" rel="nofollow">https:&#x2F;&#x2F;techcrunch.com&#x2F;2018&#x2F;06&#x2F;11&#x2F;notorious-kindle-unlimited...</a>