The XDA piece on tightening security on a fresh Windows PC made an unfashionable point: most devices do not get hacked, they get neglected. Android is no different. The system itself is well defended, but the threats that actually land come from sideloaded APKs, malicious ad networks pushed through low-quality apps, SMS phishing, and stolen credentials reused across apps. A good Android antivirus does less than its desktop ancestor, but the parts that remain (real-time scanning, link checking, lost-device tools) earn their slot. We compared seven of the most-downloaded Android antivirus apps on detection rates, performance impact, and what they ask in return.
What to look for in an Android antivirus app
The category is crowded with apps that bolt on a “speed booster” and call it security. The features that matter:
- Independent test scores. AV-TEST and AV-Comparatives publish detection-rate results on the same set of recent Android malware samples. A perfect 100% on AV-TEST’s protection score is the bar.
- Battery and memory impact. Always-on scanning is the price of real-time protection. The best apps idle below noticeable on mid-range hardware.
- Web and link protection. SMS, messaging-app links, and ad-network redirects are the modern threat surface. A working web shield blocks known phishing pages before they load.
- Anti-theft tools. Remote lock, wipe, alarm, and last-known location matter the day the phone disappears.
- Privacy and permission. Ironically, the antivirus you trust shouldn’t itself be an excessive data collector. Check what each app sends to its cloud and how aggressively it pushes sister products.
- Honest free vs paid split. Some “free” apps neuter scanning until you upgrade. Others give a complete free tier and keep advanced features (VPN, identity monitoring) for paid users.
Quick comparison
| App | Best for | Free plan | Paid starting price | Real-time scanning | Aptoide |
|---|---|---|---|---|---|
| Bitdefender Mobile Security | Detection accuracy | Trial only | ~$14.99/year | Yes | Yes |
| Kaspersky Standard | Balanced free + paid | Yes | ~$29.99/year | Yes | Yes |
| Avast Mobile Security | Free feature breadth | Yes | Around $30/year Pro | Yes | Yes |
| Norton 360 | All-in-one with VPN | Trial | ~$29.99/year (intro) | Yes | Yes |
| ESET Mobile Security | Lightweight, low impact | Yes | ~$14.99/year | Yes | Yes |
| Malwarebytes | Targeted malware removal | Yes | ~$1.49/month Premium | Premium | No |
| AVG AntiVirus | Free essentials | Yes | ~$30/year Pro | Yes | No |
The 7 best antivirus apps for Android
1. Bitdefender Mobile Security — best for detection accuracy
Bitdefender Mobile Security has racked up perfect or near-perfect scores on AV-TEST’s Android protection benchmarks for years, including against the latest threat samples. The app scans installed and newly added apps, checks links in browsers and chat apps, and flashes a warning before a phishing page loads. Anti-theft tools cover remote lock, wipe, locate, and a takedown alarm.
Bitdefender for Android antivirus also has the lightest free-tier nag of the major-name suites, but the catch is that the free tier is essentially a 14-day trial. After the trial, real-time scanning stops without a subscription.
Where it falls short: No long-term free tier. The included VPN tops out at 200 MB/day on the standard subscription. Some pricing tiers are tiered to specific regions.
Pricing:
- Free: 14-day trial of full features
- Mobile Security: starting around $14.99/year on first-year promotional pricing
Platforms: Android, iOS, Windows, Mac
Bottom line: Pick Bitdefender for the strongest detection record; budget the subscription before installing.
2. Kaspersky Standard — best balanced free and paid tiers
Kaspersky Standard (the renamed Kaspersky Security app) scans on demand and in real time, and its detection results sit at the top of AV-TEST’s protection chart alongside Bitdefender. Where Kaspersky differs is in its honest free tier: on-demand scanning, basic web protection, and lost-device tools all work without paying.
Kaspersky for Android security also includes call filtering, useful in regions where SMS and voice phishing are a daily problem. The paid tier adds real-time anti-phishing and a VPN.
Where it falls short: Geopolitical context: several governments and companies have removed Kaspersky from approved lists, including the US federal sector. The paid VPN bandwidth caps tightly on lower tiers.
Pricing:
- Free: on-demand scan, basic anti-phishing, anti-theft
- Standard: starting around $29.99/year on first-year pricing
Platforms: Android, iOS, Windows, Mac
Bottom line: A strong choice for users outside regions that have restricted Kaspersky use; check your local guidance first.
3. Avast Mobile Security — best free feature breadth
Avast Mobile Security is the most generous free tier in the bunch. The free version includes real-time scanning, a Wi-Fi network scanner, app insights, and basic anti-theft. Detection rates have improved meaningfully over the last few releases and now sit close to the top of independent benchmarks.
Avast for Android antivirus is also the app most likely to remind you to upgrade. Notifications, banners, and dialogs nudge constantly toward the Pro tier; the experience is workable but louder than competitors.
Where it falls short: Aggressive upsell. Past data-sharing controversy (the company’s analytics subsidiary was wound down after a backlash). Battery use is higher than ESET on the same scan cadence.
Pricing:
- Free: real-time scan, Wi-Fi inspector, basic anti-theft
- Premium: around $30/year, removes ads and unlocks anti-phishing, app lock, and identity protection
Platforms: Android, iOS, Windows, Mac
Bottom line: Install Avast for a serious free tier; tolerate the upgrade prompts.
4. Norton 360 — best all-in-one with VPN
Norton 360 packages antivirus, VPN, dark-web monitoring, and password tools into one Android app. The included VPN is the real differentiator: unlimited data on the standard tier, server choice, and a kill switch. Detection results on AV-TEST sit at or near 100%.
Norton 360 for Android security is the easiest one-purchase choice if you also want a VPN and basic identity tools rather than stitching three subscriptions together.
Where it falls short: First-year pricing is steep; renewal prices roughly double. The mobile UI shows Symantec-era complexity. The dark-web alert quality varies by region.
Pricing:
- Trial: limited time
- Norton 360 Standard: around $29.99 first-year, renewals significantly higher
Platforms: Android, iOS, Windows, Mac
Bottom line: Pick Norton 360 when you want antivirus and a real VPN under one bill; expect to renegotiate at renewal.
5. ESET Mobile Security — best for low impact
ESET Mobile Security is the choice when battery life and RAM matter most. ESET’s scanning engine is famously lightweight on desktop, and the Android app inherits the same priority. Real-time protection runs without the spinning-fan effect heavier suites trigger on mid-range phones.
ESET for Android antivirus also has one of the cleanest interfaces in the category, with no constant upselling and a paid tier that adds anti-phishing, payment protection, and adware detection without bloat.
Where it falls short: Detection scores are good but not always class-leading. The free tier is more limited than Avast’s; paid features include the most useful link protection.
Pricing:
- Free: on-demand scanning, anti-theft basics
- Premium: starting around $14.99/year, adds anti-phishing, payment protection, adware detection
Platforms: Android, iOS, Windows, Mac, Linux
Bottom line: The right pick for older or budget Android phones where every milliamp counts.
6. Malwarebytes — best for targeted malware removal
Malwarebytes is the cleanup tool more than it is a steady-state antivirus. It excels at finding existing infections, particularly the kind that ship through sideloaded APKs and ad-network malware. The free tier scans on demand and removes what it finds; Premium adds real-time scanning and web protection.
Malwarebytes for Android is the right call when you suspect something is already wrong: random ads on the home screen, a battery that empties in hours, or a friend warning you about texts they did not send.
Where it falls short: Free tier does not run real-time scanning. Anti-theft tools are minimal compared to Bitdefender or Kaspersky. No included VPN.
Pricing:
- Free: on-demand scanning and removal
- Premium: starting around $1.49/month, adds real-time protection, web shield, and call protection
Platforms: Android, iOS, Windows, Mac, ChromeOS
Bottom line: Use Malwarebytes to clean up an already-infected phone; pair it with a real-time tool from this list.
7. AVG AntiVirus — best for free essentials
AVG AntiVirus is owned by the same parent as Avast and shares much of the underlying engine. The free tier covers the essentials: app scanner, Wi-Fi network checker, anti-theft basics, and a permission auditor. Detection rates track Avast’s closely on independent tests.
AVG for Android antivirus is the right call when you want the same engine as Avast in a less aggressive interface. There is still some upsell, but the prompts are less frequent.
Where it falls short: Pro features overlap heavily with Avast Pro at a similar price. Identity protection on the free tier is more marketing than substance.
Pricing:
- Free: real-time scan, anti-theft basics, Wi-Fi scanner
- Pro: around $30/year, adds app lock, photo vault, anti-phishing, and removes ads
Platforms: Android, iOS, Windows, Mac
Bottom line: A quieter alternative to Avast with essentially the same engine.
How to pick
- If detection accuracy matters above everything: Bitdefender Mobile Security or Kaspersky Standard.
- If you want a serious free tier: Avast Mobile Security or Kaspersky Standard.
- If you want antivirus and a real VPN under one bill: Norton 360.
- If your phone is older or budget hardware: ESET Mobile Security.
- If you suspect the phone is already infected: Malwarebytes for cleanup, then layer one of the others for steady-state protection.
- If you want the Avast engine without the Avast UI: AVG AntiVirus.
Frequently asked questions
Do I really need an antivirus app on Android?
For most users on stock Android with apps from Google Play, the system’s own protections (Play Protect, sandboxing, scoped storage) cover the common threat surface. An antivirus app earns its keep when you install APKs from outside Google Play, click messaging links from unknown senders, or want anti-theft and link-checking layered over the OS.
Is the free tier enough?
For occasional scanning and basic anti-theft, yes. Avast, Kaspersky, AVG, and Malwarebytes all have usable free tiers. Real-time link checking and anti-phishing tend to live in paid tiers. If you receive frequent SMS or messaging-app phishing, paying for the link protection is the most valuable upgrade.
Will an antivirus app slow my phone down?
Modern Android antivirus apps use far less CPU than their desktop ancestors. ESET is the lightest on resource use; Avast and Norton sit in the middle; full-feature suites with always-on VPN and identity monitoring use the most. On phones older than four years, the heavier suites are noticeable.
What about Google Play Protect?
Google Play Protect is built into Android and scans every app installed from Google Play in real time. It is a useful baseline. Independent benchmarks show third-party antivirus apps catch more recent or sideloaded malware. Treat Play Protect as the floor and an antivirus app as the layer on top if your threat model includes APK installs or risky links.
Is it safe to install antivirus from outside Google Play?
Yes, when the source is verifiable. Bitdefender, Kaspersky, Avast, Norton, and ESET publish official APKs through Aptoide, F-Droid (in some cases), and their own websites. Avoid generic “antivirus apk” downloads from search-engine results; they are a frequent source of the threats they claim to remove.
