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asked in Private Books by (29 points)

Is there a way to get free access to some chargeable content in Private Books app for Android?

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answered by (35 points)

If you want to get access to chargeable content of your choice without paying, use promo code.

To get promo code, login to problemko.com, post a worthfull question or answer and send a promo code request mail to private.books@problemko.com.

If the promo codes are available, you will receive a reply mail with Google Play Store link to promo code that you can redeem on your Android device.

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