You're the best Xavier!

Great! I will definitely try it out.

nice.

I hear that Google allows App Data sync with their servers. I would look into this as a possibility for data sync.

I will be glad to test it!

Maybe use the user's Google Drive to save the ompl/playlist/read and unread/etc.? Just have the program check the Drive for an updated/newer version of the file. Don't save audio to it though, just the config and metadata. That way, there's no more server work for you, as Google Drive takes the brunt of the bandwidth. Plus, the user will have complete control over their data, and they have it backed up somewhere safe.

This way, no matter what device you're using, if it's online (should be for a podcast app), it'll be able to keep the sync file up to date. If it's not online, then it'll just default to the local copy.

That way, if I have Podcast Addict on my phone, my tablet, and installed in Chrome (it works), then I, as a user, don't have anything to worry about, and there's no central device to worry about.

https://gpodder.net/ will allow you to keep track of your podcasts shows and playbacks, there are several android, iphone, mac, windows and linux applications that do support this service.
There is already a suggestion for this feature
https://podcastaddict.uservoice.com/forums/211997-general/suggestions/4351924-add-support-for-https-gpodder-net

An excellent aplication, with sync feature would be 5* app. Please Xavier do it

I still have a couple releases to deliver will small improvements / new features and bugfix, then I will spend a couple of weeks developing this. Then it will take at least another couple of weeks for intensive beta testing...
I hope to deliver this feature before the end of the year

It has beem several months.. any more progress on this?

@Xavier Guillemane

This feature would be great. I have a Nexus 4 and a Nexus 7 and it would be great to switch from device to device and pickup where I left off on my last podcast with read and playlist synced between each.

Another vote for gpodder!

This would be great, especially if you get a new phone at times.

This would be a great addition to a great app...

Would love to have podcast subscriptions, read/unread status and playlist work across multiple devices (e.g. phone & tablet) and even better, to be able to also have desktop access as well. Would love this feature!!

Even if Podcast Addict implements its own format to fully support all Podcast Addict features it would be great to see gPodder support for cross-platform synchronization; organizing large lists of Podcasts is more comfortable on a PC.

I just want to sync the part of a podcast I'm up to between my tablet and phone, although since I go through phones a lot, having an account that would immediately grant me access to all my feeds without setting up again would be awesome.

This has probably been said before, but this would be awesome as a part of the paid app feature.

Any thoughts on my idea?

Use Google drive for sync. Google chrome uses it and it does a great job.

You could create your own information storage schema. This would allow you to store whatever you want (like pod casts that have already been listened to).

The only down side is that if the user does not have a Google account that it may not work.

A plus side is that if you make the schema like an XML then it would only take like 1kb to store your information. This is usually available on the user's profile.

I personally would do this:
If you are only distributing the app on Google play then Google drive is a good idea. But if you are distributing it elsewhere then look into alternatives.

Or you can just support multiple services like MS one drive, Google Drive, Dropbox or logmein cubby.

Hope this may further your efforts on implementing this feature!