Is it possible to use KIK points in your own app and is it possible to trade them with others?
There is no public API for Kik Points. All partnership possibilities should be sent to partners#kik.com
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Is there a way to see in the Google Play console how many users at which time of the day were actively using my app?
Not at the moment. If you want analytics like this then you probably want to add a solution like Firebase Analytics to your app.
Is it possible for my GAE to be balanced accross regions? Like US and Europe.
https://cloud.google.com/about/locations/
Reading the link above it says that it scales automatically within or accross multi-regional locations.
What does that mean? Do I have to enable automatic scaling across regions? If so, how do I do that?
And secondly, if it does handle automatic scaling across regions, the choice one makes for App engine location when creating a new project, is that irrelevant for a Google App Engine instance?
See this from Google Groups: https://groups.google.com/forum/m/#!topic/google-appengine/svMhwuFC5zk
The short answer today is no it cannot be accomplished in App Engine as is.
But, if you feel like hacking, it seems the above thread is suggesting setting up a load balancer to serve Compute Engine and then have these instances route to your "different" projects with App Engine deployed in your various regions (i.e. one deployment in a region per project). Seems like a mess, but possible.
There may be light at the end of the tunnel (eventually): https://issuetracker.google.com/issues/65039982
You cannot change the region. Your app will be served from the region you chose when creating the app. Anyone can use the app, but users closer to the selected region will have lower latency.
While the App Engine service itself operates in multiple regions, an App Engine app is served from a single region. The app will, however, scale across multiple zones within that region.
See App Engine Locations for more.
You can use a potential solution using HTTPS LB with Serverless NEG, Serverless NEG connects internal services directly without GCE. See https://stackoverflow.com/a/62660953/4185100
Yon asked this question on the mailing list, where it was answered. To reiterate what folks said there: App Engine is automatically scaled across multiple regions, but those regions are defined by Google. You'd have to set up another project to handle traffic in the EU, for example.
Is it possible to publish application in Kik, but restrict access for limited number of users?
Something like Facebook sandbox mode.
Thanks,
Serg.
Kik is simply a mobile web browser. Your webapps can run on any users device without Kik's permission. So there many means by which you can accomplish what you described.
Kik itself doesn't have a service to do this yet but that doesn't mean you cannot do it.
I have an app running on the app engine. Now I am not reaching any of the free limits, except for recipients emailed. My question is, can I pay to just increase that 1 limit? I read the information that google provides about pricing but I can not find an answer to my specific question.
No, you cannot. But you can use another service to send mail, like Amazon SES.
I'am a great fan of app engine. Except for the mail service, because it will give you know feedback about mail delivery. See this issue.
http://code.google.com/p/googleappengine/issues/detail?id=1800
I added some code to this issue, to use SES.
No, but why would you want that? Even if you enable billing, you still have all the free quotas.
Well, I've been building some free apps on top of appengine, but now I want to start charging money. My question is:
What is the best way to collect payments from users. Do certain services (paypal, google checkout, etc) work better/worse with AppEngine's library restrictions? Are there any good examples or tutorials to help me learn how to do this?
You can do this any way you want, really - and there's nothing App Engine specific about it. For example, you could use Google Checkout or Paypal, and charge users on any basis you want.
Also just something to point out about the implementation, a simple boolean property on your user object should allow you to easily turn functions in your app on and off, depending on which tier your user has paid for.
Checkout http://Spreedly.com or http://Recurly.com. Both are billing solution SaaS apps. http based api's and easy to use. I use Spreedly.com
If you plan to sell business apps you could integrate with the Google Apps Marketplace which uses Google Checkout for billing.