The retail giant Amazon matches Walmart by offering the free shipping to shoppers who spend more than $35 where the threshold used to be $49. Amazon apparently does not want Walmart to offer a better deal on shipping.

Without any promotion, Amazon has lowered the minimum line required for free US shipping from $49 to $35, something The Verge noticed this weekend and reported the news on Sunday. That threshold applies to shoppers who are not the Prime members, and the minimum for free shipping on the books remains $25.

An Amazon spokeswoman confirmed that they "recently" lowered the minimum price for free shipping, but the spokeswoman decline to specify when the change took place or why it made the move.

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However, the competitor Walmart, just in the last month, ended its similar membership program while at the same time lowered its website's minimum line for the free shipping to $35. It also sped up those deliveries to two days. Amazon's free shipping offer is for the regular five to eight day shipping (unless you sign up for the Prime.)

It is all part of an apparent battle for online shoppers who have yet to join the Prime. An estimated 44 percent of US households subscribe to the Prime, making them far more likely to shop regularly within the Amazon.

Amazon raised the minimum amount for the free shipping a year ago to $49 from $35. It upped the price to $35 from $25 in the year 2013.

With this reduction of minimum amount for free shipping would increase the sales of Amazon including the market share as the company expects to grow at large.

By Mrudula Duddempudi.