Means for exchanging data between mobile applications? Cloud?

Question

Mobile development

Given:
1e6 mobile apps (iphone/android). At will, any user of the application can give access to his collected data (up to 1Mb) to another user.

Required:
to determine the technical means of implementing the exchange, so that everything is done once and not remembered (well, or do it as little as possible)

Solution 1:
xml+php+mysql+hosting. Classic. We buy inexpensive hosting, write a php script that receives and distributes data. We use mysql to store data and server parameters. We use xml to wrap the data.
Bad: hosting sometimes lies. Slow access from other countries (hosting in Russia, but applications everywhere

)
Cloud. Rubber. So to pay for what you consume. So that it works 24/7 and costs as little as possible. And I also think to choose not php, but python - I heard a lot of good things about it.
If a cloud, what kind? Amazon? If you write a script, then which language to choose?

Answer 1

parse.com

Answer 2

Well, if you don’t have anything against Microsoft, then you can try SkyDrive - fortunately there are examples of use for Android and IOS (look for LiveSDK), but in this case the user needs to have a Live ID (that is, for free) well, as far as I know, there is something like up to 1 GB for free.

Answer 3

Understood, well then cloud! As for me, I am for Azure, but this is purely personal ...