Apple Inc.’s (AAPL) new mobile operating system iOS7 has been facing complaints from some of its users and some of them have even gone on to say that it makes them feel queasy. Although the iOS7 is a dynamic operating system, the over usage of the zoom feature and slide animations gives a feeling that the icons are almost floating above subtly animating wallpaper. This has not gone down well with users.

Reportedly, some active users complained that the animations displayed while opening or closing apps caused headaches and feelings associated with motion sickness. It has been reported by different users that they close their eyes during the transition phase from one App to another.

Actual users have experienced that, if one touches an App it seems as if, the icons are flying and giving a very dizzy feeling. Moreover, the usage of the zoom feature is making iOS7 users’ motion-sick. Moreover, Apple’s support forums have been flooded with such issues.

Although Apple’s parallax feature has been introduced newly, the company added a new setting to turn it off. The settings offer features such as “reduce motion,” which can tone down the agility of the parallax on icons and alerts.

Users suffering from the above-mentioned problems are also seeking another solution. They are asking the service provider AT&T (T) for a new iPhone 5 loaded with the older version of the operating system, iOS 6.

Apple has already sold 9 million of the new iPhone models in the first three days of the launch. This is nearly double than the 5million iPhone 5’s sold in the first three days a year ago and up from the Street estimate of 6 million.

Apple, for the first time, rolled out the two new iPhone models in China on the same day rather than delaying for three months. This move has benefited the company, as about 15% of the total iPhone sales come from China. Moreover, we are also optimistic about Apple’s partnership with China Mobile (CHL).

But the complaints come as a dampener, which might tone down the enthusiasm around the new iPhone model loaded with iOS 7. Moreover, stiff competition in both smartphone and tablet market from the likes of Samsung and Amazon.com (AMZN) remains a major headwind going forward.

Apple has a Zacks Rank #3 (Hold).

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