In a bid to avoid paying transaction fees to Google and Apple, Amazon has removed in-app purchases on the ComiXology iOS app and updated payment options on Android.

Amazon acquired ComiXology recently, and in a move that has irked fans of the digital comics service, the online retail giant has stopped allowing in-app purchases of comics from within the iOS app.

The move is intended to prevent Apple from collecting 30 percent of each purchase, something it has done with in-app purchases since 2011. Instead of buying within the app, customers will now have to make purchases via the ComiXology website. Purchases will then sync with the app once the user opens it, much like e-books on Amazon's Kindle for iOS app.

Additionally, the change removes the ability for users to be notified about sales via the app itself. To learn about those, iOS comic fans will now have to sign up for ComiXology's newsletter.

As for Android app users, they'll still be able to make in-app purchases within the Comics app. However, they'll no longer be able pay using Google Wallet. Shoppers will have to register a credit card or a Paypal account with ComiXology directly.

To sweeten what's sure to be an irritating process for some, ComiXology is offering a promotion for those who upgrade to the latest iterations of the iOS and Android Comics apps.

"Last, but not least, to thank our loyal customers and ease this transition, we are offering a $5 eGift Card credit to all those who have purchased through the comiXology platform in the past," the company said in a blog post. "This credit will be automatically applied throughout the day to those accounts who are eligible and all of those eligible have 30 days to purchase books with that credit. Enjoy."

The news is not sitting well with some ComiXology faithful.

Massively unimpressed with the @comiXology decision to stop in-app downloads. Causes more hassles. I won't be using them.

— Tony Lee (@mrtonylee) April 27, 2014

Removing in app comic purchase is a huge mistake @comiXology - 100 percent for pro-$ and anti-customer.

— Hoon Lee (@MisterHoonLee) April 27, 2014

Hey @comiXology, Seriously WHY and WTF?!?

— Mike Monteiro (@monteiro) April 26, 2014

Others saw a silver lining.

Griping about @comiXology closing iOS store? Don't. This should be good for creator-owned comics - Apple no longer gets cut of their sales.

— Elliot Blake (@elliotblake) April 27, 2014

For more, check out Everything You Need to Know About Digital Comics, as well as PCMag Live in the video below, which discusses Amazon's decision.