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When I start reading a PDF or TXT on my Mac and continue reading it on my iPhone, I have to waste time looking for exact place where I stopped reading on my Mac before continuing to read on my iPhone.

Is there a web-based app or a Mac/iOS app that would remember where I left off, the way Whispersync does in the Kindle app?

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up vote 2 down vote accepted

Here are a few options you could check out:

  1. Instapaper
    • Acts a lot like Whispersync for any article you find on the web.
    • You can read via a nice iOS app or the web app.
    • You can also forward txt into your Instapaper account via email.
    • It's supported by a ton of additional iOS apps.
    • You can use actually link it right into your Kindle natively through Instapaper or using Ephemera.
    • It does NOT do PDF that I am aware of.
  2. Simplenote
    • A slick app to sync text files across devices including your Mac and iOS devices.
    • It has lots of third party support.
    • It does not do PDF or any of the Whispersync-like reading progress syncing.
  3. Good Reader + Dropbox
    • You can sync PDFs and other eBook formats easily between your Mac and iOS devices using Dropbox.
    • This solution will NOT do the Whispersync-like reading progress syncing.

As far as I have seen I think Instapaper is going to be your best option for getting a very similar experience to what you're looking for.

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This is very thorough. Also, now Kindle's app let's you Whispersync non-Amazon files. – Andrew Warner Jan 1 '12 at 16:14

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