Add domain to Google Appengine w/o using Google Apps for Business

Question

I've tried to add a custom domain for my app, my own domain, instead of default example.appspot.com.

But just figured out that Google don't allow to use Google Apps for free anymore. Only Google Apps for Business.

Actually I don't need anything provided by Google Apps for Business, just need to use my own domain for my GAE project. But seems that now there no way to use custom domain w/o signin for Google Business account? and paying $50 a year.
Is it correct? Is there any other way to add custom domain to GAE?

Answer 1

UPDATE: see comment from @JW.

I just discovered today (as of 2014-04-11) a new custom domain settings page is available from Google Developers Console:

Go to https://console.developers.google.com/project Click on your project On the left click "App Engine" Click "Settings" There you go! You can configure custom domain without the need of Google App account!

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Register for Google Apps for Business and apply for $50 credit.

Starting June 15 and for a limited time, Google will offer a USD $50.00 App Engine credit for Google App Engine developers who have recently purchased a new Google Apps for Business domain account for their App Engine application.

https://docs.google.com/forms/d/1lSDA5Jol0Bosaop3RKZ9YqlSyzVLsCtAv8gYupBheR4/viewform

Answer 2

From https://stackoverflow.com/a/23006209/8137:

I just discovered today (as of 2014-04-11) a new custom domain settings page is available from Google Developers Console:

1. Go to https://console.developers.google.com/project
2. Click on your project
3. On the left click "App Engine"
4. Click "Settings"

There you go! You can configure custom domain without the need of Google App account!