Both RDC and a rest solution with B4J will work fine.
RDC doesn't include any interface. If you need to access it with a browser then it will be simpler to implement a server app with B4J. See this example:
http://basic4ppc.com:51042/dbutils/index.html
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Erel do you confirm me that using data collection solution I can do the following operations :
1) I can add new records filled by a users on an Android clients
2) Retreive informations by Web app and / or Desktop App (few sessions)
3) Update record from Web app and / or Desktop App
The last but not the least :
- Which hardware requirements I need (minimum req) to run the "Data Collection Solution" in a production environment within a scenario with about 500 Android clients * that retreive and update some records with a low update frequency ?
* The prod db could be about from 1000 to 3000 records