Hello,
We are expert to create Whatsapp on iPhone, Android, Blackberry platform.
ESTIMATION:
Native platform:
iPhone:
Timeframe: 80 to 90 working days
Cost: 8K
Android:
Same as iPhone
Blackberry: depends on Blackberry platform.
Timeframe: 50 to 60 working days
Cost: 5K
TO create application using Flex Platform:
iPhone & Android:
Timeframe: 40 Working days
COST: 4.5K to 5K USD
Awaiting for your valuable response.
Thanks,
Aritra saha