TOPS Technologies is a trusted source for an eCommerce platform.TOPS is a leading eCommerce Web Development firm in India and has expertise in eCommerce Web Design, Development and Customization.

View the eCommerce Portfolio at http://goo.gl/QhkC5v
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Basically the app cost like whatsapp for iphone is generally between $10000 to $150000. I am suggesting you to consult with TOPS Technologies if you are interested in getting a developing application with high quality and within deadline.

For more details visit at http://www.tops-int.com/outsourcing/iphone-apps-development.html

Except Freelancer and upwork I have suggested you go with Linkedin. This is the best way to find contractors for your requirements.

In SEO, you can expect result after 3 months.

How can I measure performance? - you can check organic traffic for your top keyword rather then refferal traffic and direct traffic.

If increase the ranking of your targeted keywords and traffic then it's your pure result.

First of all Congratulation on your new business. Now you want to grow your new business then TOPS Technologies is best for you. We are software development company located in India.

you can try multiple ways to getting profit for your business
which by they way is extremely aggressive even for a US based company let alone an India firm with a market conversion of 63 to 1INR.

You can try to SEO for growing your business for long term.

If you are searching for best resource for a expert lead generation then you go for a good lead generation firm like TOPS Technologies who has experienced and dedicated resource, with best results.

Hope it works.

Do not hesitate to talk with us. I am advising you to choose http://www.tops-int.com/Outsourcing/

We can make it with cost effective rates.