In an era dominated by technology, the security of mobile devices has become a growing concern. Today, smartphones are much more than just a means of communication: they store documents, photos, banking apps, and the passwords that grant access to all of this. Protecting this from scams, malicious links, and fake apps is no longer a luxury. This is where antivirus apps for mobile phones come in.
Choosing the right antivirus, however, isn't just about picking the most popular one in the store. It's important to understand what each one covers, which features are missing from the free version, and how much the subscription costs—because, in this category, practically everything that matters is behind a paid plan. The five apps below were checked on the Brazilian Google Play Store, paying attention to price, advertising, and availability in each store.
The 5 best antivirus apps for mobile phones
1. Norton 360: VPN and Antivirus
Formerly Norton Mobile Security, the application is now called Norton 360 (com.symantec.mobilesecurity) and is a renowned name in the world of digital security. It offers malware protection, alerts about dangerous links in messages and browsing, VPN, and dark web monitoring to warn you if your data has appeared in any data breaches. The App Advisor feature analyzes applications before installation and points out those that request excessive permissions.
Price and platforms: the Play Store listing doesn't have a "Contains ads" label, but it does list "In-app purchases" ranging from R$ 3.59 to R$ 2,399.99. The app's description itself explicitly states that an annual subscription is required to activate the 7-day free trial—meaning there is no permanently free version. It is available for Android and iPhone.
2. Bitdefender Mobile Security
Bitdefender Mobile Security (com.bitdefender.securityIt is known for its lightweight performance: the scan runs in the cloud, which reduces the impact on battery and memory. In addition to malware protection, it includes VPN, anti-theft features, and Application Anomaly, a behavioral layer that flags suspicious actions even before the file is classified as malicious. The interface is intuitive, accessible even to those who have never used an antivirus.
Price and platforms: no ad label and with "In-app purchases" from R$ 3.14 to R$ 799.99. The description in the store advertises a 14-day free trial; after that, continued use requires a subscription. It is available for both Android and iPhone, in separately published apps.
3. ESET Mobile Security
ESET Mobile Security (com.eset.ems2.gpThis is the most interesting option for those who don't want to subscribe to anything. The Slovakian company offers malware scanning, protection against phishing and fake websites, auditing of installed app permissions, and scanning of USB devices connected to the phone. Anti-theft features and advanced filtering are in the paid tier.
Price and platforms: without the "Contains ads" label and with "In-app purchases" from R$ 2.29 to R$ 289.99. It is the only one on the list whose description explicitly offers two entry points: 30 free days of the premium version or the use of the basic version without commitment, which remains free. An important detail: ESET Mobile Security only exists for Android — there is no equivalent app in the Brazilian App Store, where the brand publishes ESET HOME, ESET VPN, ESET Password Manager, and ESET Secure Authentication.
4. Avast One
The former Avast Mobile Security has become Avast One (com.avast.android.mobilesecurityThis app combines antivirus, VPN, Wi-Fi network scanning, data leak alerts, and junk file cleaning tools into a single application. It's the most installed on this list and maintains a reasonably complete free layer for those who only want basic protection.
Price and platforms: here's a warning that others don't require — the Play Store listing has a "Contains ads" label, in addition to "In-app purchases" ranging from R$ 1.29 to R$ 414.99. In practice, the free version is supported by in-app advertising, and the unlimited VPN traffic is part of the subscription. Available for Android and iPhone.
5. McAfee Security: VPN Antivirus
McAfee Security (com.wsandroid.suiteThis is a complete package that goes beyond antivirus: it offers protection against text message scams, VPN, identity monitoring, device locator, and alerts about insecure Wi-Fi networks. The verification of links in SMS and messaging apps is especially useful in Brazil, where a large portion of scams originate precisely through these channels.
Price and platforms: no ad label, with "In-app purchases" from R$ 2.55 to R$ 989.99. The description offers 7 days of free protection; after this period, the main features require a subscription. Available for Android and iPhone.
Free or subscription? What to expect regarding the price?
This is the most frustrating aspect of the category. All five apps are available for free download from the store, but none are truly free in their full version: all five carry the "In-app Purchases" label and sell plans that are usually charged annually. Norton 360 and Bitdefender only offer a trial after subscribing or after a few days; McAfee offers a week; Avast One maintains a free tier, but with ads.
If the goal is protection without recurring costs, ESET Mobile Security is the only one on the list with a basic version that is explicitly free and ad-free. It's also worth remembering that Android comes with Google Play Protect already enabled by default, checking installed applications without charging anything—for many users, this, combined with common sense when clicking on links, is enough to solve the problem.
A warning about Kaspersky and other apps not available in the app store.
Lists of antivirus software for mobile phones used to include Kaspersky Mobile Antivirus. It's no longer available on the Brazilian Google Play Store: the app pages return an error, a result of international sanctions that led to the removal of the company's products from the Android store. The brand continues to publish and update its products on the Brazilian App Store—the problem here is specific to Google Play. This isn't a judgment on the software's technical quality, but a practical fact: it's impossible to install it from the official store.
And that's precisely where the risk lies. Apps that are removed from the store push the user to APK file sites, a download that bypasses Google's security checks and may deliver a modified version. Installing an "antivirus" from outside the store is the kind of irony that usually ends badly. If a security app is no longer on the Play Store, the right thing to do is to replace it with another that continues to be officially distributed.
Additional features of mobile antivirus software
In addition to basic malware protection, these apps offer a variety of extra features. Among the most common are VPN for browsing public networks, link verification in messages, password-protected app locking, data leak monitoring, remote device location, and file cleaning tools. Evaluate which of these items really make sense for you before choosing a plan—many people pay for an entire package to use only one feature.
Frequently Asked Questions
Is it really necessary to have antivirus software on your cell phone?
It depends on your usage. Those who only install apps from Google Play and don't click on links in unknown messages already have a good layer of protection with Play Protect. A paid antivirus makes more sense for those who install apps from various sources, use public Wi-Fi a lot, or want features like VPN and identity monitoring all in one place.
Do antivirus programs slow down your cell phone?
Current applications are much lighter than those from a few years ago, and a large part of the analysis happens in the cloud. Even so, functions that run all the time, such as a constantly active VPN, consume battery. Keeping two antivirus programs installed at the same time is what really hurts performance—choose just one.
Can I trust free antivirus software?
Yes, apps from well-known companies, downloaded from the official store, are fine. Be careful with unknown apps that advertise themselves as free antivirus software but, in practice, display aggressive advertising or collect data. Always check the developer and the "Contains ads" and "In-app purchases" labels before installing.
Conclusion
Choosing the right antivirus app is essential for keeping your mobile device secure, but the decision depends on both features and price. Norton 360, Bitdefender, and McAfee offer complete packages with annual subscriptions; Avast One maintains a free tier with ads; and ESET Mobile Security is the only one that offers a free, ad-free basic version, although only for Android.
Whichever option you choose, only install from your system's official store, read the seals on the product page before confirming, and check the renewal price before accepting any free trial. Prices and features change frequently: if you find any outdated information on this page, write to [email protected] and we will review it.
