google app engine for my little app & pricing?

Hi Experts,

I made a silly little game that I want to save a few hundred kilobytes of data with google app engine per user on an ongoing basis say twice per week for about a year worst case.

My app will not charge a subscription fee, so I need to either make enough money with ads to pay for google app engine, or my one-time fee for the app would need to cover the cost of all the data synchronization with the cloud (probably won't ever go over 1 MB per user lifetime).

I've looked at the google app engine calculator to try to get an idea what it would cost me to use this service for my app, but I need to learn a lot about the service and don't want to waste my time if this could cost me too much.  By what I've described here, and if you have some experience with app engine, can anyone give me some insight here?

Many thanks,
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Koen Van WielinkBusiness Intelligence SpecialistCommented:
Hi Mike,

While cloud computing has made access to these kinds of services available to virtually anyone, one of the tricky bits is to estimate the costs upfront, because there are so many variables at play.
As it happens, we just went live this month with an application that was developed for us by a 3rd party to handle our sales budgets. It's written in Java and deployed on AppEngine. I'm not a developer so I can't help with the technical details of deployment, but I do have access to the developer console so I can give you some numbers.
Right now we're in our peak budget cycle so usage is at it's heaviest, probably about 50 people accessing the system at least several hours per day. Our total Datastore storage requirement including indeces at the moment is a little over 900Mb.
I've attached a screenshot of our current billing overview for the month of October. Right now it stands at about $50.- so probably it'll cost us a little over $100.- per month.
I'm not sure if this will help much, but perhaps if you have a rough estimate of the number of users you'll get, you can use this to your advantage.

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threadyAuthor Commented:
wow that's a really great thorough answer.  Thanks a lot for your help and Siri for my late response!
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