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Can I trust Avast One: Antivirus, Security?

unTRUSTED 44 Android Version 26.6.0.260325387 Scanned build downloaded: Store version released: Last checked: com.avast.android.mobilesecurity Scanned

This app did not meet two or more trust checks, has a critical issue in one, or has a red flag.

Main concern
Three analytics SDKs fire before consent and include code to transmit GAID to Singular pre-opt-in
The developer's description
All-in-one mobile security app with antivirus, VPN protection, scam detection, call blocking, and device cleanup features. Over 100 million downloads on Google Play.
Third-party services
16
Findings rated low or higher
13

How the score and the label work

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Full findings

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Trust checks

  • Secure by Design

    One criterion not met

    Security gaps detected

    Why this result

    This check looks for security issues at high severity or above in the code of this build, and at least one was recorded. Issues of this kind include a credential or token another app on the device can reach, sensitive data stored without protection, and network paths that expose information in transit.

  • Data Minimization

    One criterion not met

    Tracking lacks clear disclosure

    Why this result

    This build contains analytics or attribution code written to send data to companies other than the developer. No consent step was found before that code runs, and the app's disclosures do not describe the collection in full. Tracking by itself is ordinary; what this check reports is the combination of collection, recipient and absent disclosure.

  • Manifest Mismatch

    One criterion not met

    Disclosure incomplete or contradicted

    Why this result

    The check compares the app's privacy disclosures against what the code does, and at least one claim did not match in this build. Mismatches of this kind include a data category collected but not disclosed, a recipient the disclosure omits, and an identifier attached to data the disclosure describes as anonymous.

  • User Control

    Strong

    No lock-in

    Why this result

    The check looks for a way to export the data an account has accumulated and a way to delete the account itself. In this build, either both were found, or the app has no account of its own and keeps its data on the device. For an app without an account, the developer has no server-side copy to export or delete, and deleting the app removes the data in its own storage.

    The app is a subscription security service whose core function is scanning and protecting the device rather than storing user-generated content in a proprietary format. Canceling the subscription or uninstalling the app does not leave meaningful user data trapped in the developer's systems in a way that would require a dedicated export or deletion path.

Strengths

  • App backup is fully disabled across all storage domains, preventing data extraction via Android backup or device transfer
  • Auth tokens (OIDC/SSO) are protected by Android Keystore-backed AES encryption at rest
  • VPN tunnel uses certificate pinning against the expected SurFEasy endpoint, resisting MitM attacks on the VPN connection
  • The app includes code to send root detection telemetry only to the developer's own first-party infrastructure (analytics.avcdn.net), with no code to send it to advertising networks or data brokers

What the app contains

  • 16 services

    Third-party services the scan names in the build:

    • Firebase Analytics
    • Firebase Crashlytics
    • Firebase Messaging
    • Firebase Remote Config
    • Adobe Analytics
    • Singular (attribution)
    • Hiya Caller ID (v5.33.7)
    • Google AdMob
    • Unity Ads
    • Vungle / Liftoff
    • Facebook Audience Network
    • Auth0
    • SurFEasy VPN SDK (v6.0.10)
    • WireGuard (libgojni Go mobile bridge)
    • Apollo GraphQL
    • Google Play Billing (v7.1.1)

Libraries

Libraries in the build of Avast One: Antivirus, Security
LibraryVersionAdvisory
ExoPlayer / media3not recordednone confirmed
Roomnot recordednone confirmed
Lottienot recordednone confirmed
Google Play Billingnot recordednone confirmed
Apollo GraphQLnot recordednone confirmed
Auth0not recordednone confirmed
Facebook Audience Networknot recordednone confirmed
Glidenot recordednone confirmed
Datatransportnot recordednone confirmed
Google Mobile Ads (AdMob)12451000none confirmed
Show all 41 libraries

Changes since the previous scan

  • Version 26.6.0.260325387, score 44.
  • Score 66 before, 44 after.
  • Version 26.1.0.260122076 before, 26.6.0.260325387 after.
  • Score change since version 26.1.0.260122076: -22 points.
  • Since the previous scan: 17 findings added, 9 removed.
  • Version 26.1.0.260122076, score 66.
  • First public scan of this app.

Method and limits

Static analysis: the decompiled code, manifest and resources of this build, read file by file. Network traffic at run time is established by a capture of the running app.

Build SHA-256
dc90898f4ca884061fa32c3ca0eee402c18a825ba1581eb9b3fd2603d8b35231
Rule pack
citt-ruleset-2026-08-v1
Files decompiled
70,619
Scan date
12 August 2026

Corrections

No correction is published for this app.

Developer response

No response is published for this app.

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