Did you know if you buy 3 extra credits through your audible app it costs you £ 23.00, but if you buy them through your browser it only cost £ 18.00.
I asked on Twitter why this was and got this answer.
Hi there. Prices differ depending on the surface that you're on. When you make purchases in the app, your billing relationship is not with Audible, but rather with Google or Apple depending on your device.
So you are basically paying £5.00 to either Google or Apple as well as for the credits.
You can buy 1 credit on the app as well but that's 9.95, when if you just buy the book it's only 7.99!
Buying 5 credits on the app is 32.99, 28.99 on the browser.
Make sure you go to your browser, open audible and sign in then buy your credits