When comparing Kaspersky vs Avira, the Slant community recommends Avira for most people. In the question“What is the best antimalware software for a new computer?” Avira is ranked 4th while Kaspersky is ranked 5th. The most important reason people chose Avira is:
I've used AVG Free in the past, and it seemed to slow my computer more than Avira does.
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Pros
Pro 99.7% detection rate result and 6/6 protection score from third party testing labs
Kaspersky recieved a 99.7% detection rate result from the AV Comparitives Mobile Security Review behind only AhnLab and Kingsoft. From AV Test, Kaspersky recieved a 6/6 in both protection and usability.
Pro SIM watch
Kaspersky's SIM watch feature will alert you by email if the SIM card has been removed with the location of the device and can lock the device.
Pro Fast, and free version seems powerful
I've used AVG Free in the past, and it seemed to slow my computer more than Avira does.
Pro Can install more components if you wish.
Optional installs include VPN, System Speedup, a password manager, browser extensions, and a hardened browser.
In the case that you've downloaded the Free Suite (not recomended), you can uninstall the above mentioned additional downloads with Avira's Connect app or any uninstaller utility software. This flexibility to cherry pick your extra software keeps the bloatware down somewhat.
Cons
Con Moderate effect on performance
Kaspersky is not the most lightweight application or as well optimized as applications such as Lookout. Some slowdowns may be experienced using Kaspersky but that may be a necessary sacrifice for Kaspersky's stronger virus detection rate.
Con Awkward and outdated user interface
Navigating the settings menu and other features in Kaspersky's mobile application is an awkward experience even with new redesigns. The application lacks a consistent design and the settings menu especially feels like one of the earlier Android applications designed.
Con Some basic antivirus features available only for paid users
The free version of Kaspersky will not automatically scan new applications after they are downloaded. Cloud enabled protection to react to fast and new threats is also a paid only feature. The paid version of Kaspersky is $14.95 a year.
Con Occasional pop-up ad in the taskbar
The ad is nagging the user to purchase Avira
Con Extras like Browser Safety include offers/deals when you're shopping
This is exactly the sort of behavior users want to prevent when using antivirus and similar security tools.