Preview: Policy Engine, Universal keys, and challenge policies are available in Preview for Google Cloud Fraud Defense.

• Policy Engine lets you perform frontend JavaScript integration using AutoExecute and configure custom rules to selectively trigger CAPTCHA challenges based on risk score, IP addresses, user agents, ASNs, or verified bot identities.
• A new AI-resistant QR code challenge is available.

For more information about the types of challenges that are available, see Challenge types.

reCAPTCHA Mobile SDK v18.9.2 is available for Android. This version includes minor bug fixes.

reCAPTCHA Mobile SDK v18.9.1 is available for iOS. This version fixes symbol collisions with libraries using Objective-C protos.

reCAPTCHA Mobile SDK v18.9.1 is available for Android. This version fixes an issue that caused package name collisions when building projects using Android Gradle Plugin version 9.0 or higher.

reCAPTCHA Mobile SDK v18.9.0 is available for Android. This version includes the following updates:

• Improvements to SDK latency and reliability.

• Score distribution calibration improvements.

• Removes the need for desugaring and raises the minimum supported Android API level to 24 (Android 7.0).

reCAPTCHA Mobile SDK v18.9.0 is available for iOS. This version includes the following:

• Reliability improvements and bug fixes.

• Score distribution calibration and improvements for better bot detection. We recommend that you review your score threshold and adjust it if you experience a high number of false positives.

• Beta support for visionOS.

• Beta support for arm64e and Enhanced Security Features.

reCAPTCHA is part of Google Cloud Fraud Defense, a suite of security products designed to protect your websites and applications from fraud and abuse. This change does not affect existing reCAPTCHA functionality. For more information, see Google Cloud Fraud Defense.

reCAPTCHA Mobile SDK v18.9.0-beta02 is available for Android. This version includes the following:

• Reliability improvements and bug fixes
• Score distribution calibration and improvements

The updated reCAPTCHA Mobile SDK improves the risk score. You should review and adjust your reCAPTCHA action thresholds as needed.

reCAPTCHA Mobile SDK v18.9.0-beta01 is available for iOS. This version includes improvements to SDK latency and reliability.

reCAPTCHA Mobile SDK v18.9.0-beta01 is available for Android. This version includes improvements to SDK latency and reliability.

reCAPTCHA Mobile SDK v18.8.2 is available for iOS. This version fixes a race condition affecting multiple simultaneous calls to execute.

reCAPTCHA policy-based challenge keys are available in GA. With policy-based challenge keys, you can configure reCAPTCHA to deterministically trigger CAPTCHA challenges based on a score threshold and challenge difficulty. For more information about the policy-based challenge keys, see reCAPTCHA keys overview.

reCAPTCHA Mobile SDK v18.8.1 is available for iOS. This version fixes an issue with iOS 26 screen time showing use from recaptcha.net

reCAPTCHA Mobile SDK v18.8.0 is available for Android. This version contains reliability improvements and bug fixes.

reCAPTCHA Mobile SDK 18.8.0 is available for iOS. This version contains the following changes:

• Reliability improvements and bug fixes
• Swift 6 and Xcode 26.0 support
• The minimum supported version is iOS 15. This is in accordance with the compatibility guidelines for Xcode 16.

reCAPTCHA Mobile SDK 18.8.0-beta02 is now available for iOS. This version contains reliability improvements and bug fixes.

Change

reCAPTCHA Mobile SDK v18.8.0-beta03 is available for Android. This version contains reliability improvements and bug fixes.

We've enhanced the reCAPTCHA Admin console to provide a more intuitive interface for configuring risk score thresholds. These improvements help you define how to act on different risk scores. You can also get a better understanding of the transactions that will exceed the threshold which can help in deciding what you allow, block or further reviewing transactions.

For more information, see Protect payment transactions with Fraud Prevention.

Feature

Transaction Defense Reasons is generally available. This feature enhances transparency by providing clear, human-readable explanations for why a particular transaction receives a high transaction risk score. The reasons help you better understand the risk assessments and take more informed actions to protect against fraud.

For more information, see Risk reason.

reCAPTCHA policy-based challenge keys are now available in Preview. With policy-based challenge keys, you can configure reCAPTCHA to deterministically trigger CAPTCHA challenges based on a score threshold and challenge difficulty. For more information about the policy-based challenge keys, see reCAPTCHA keys overview.

Change

reCAPTCHA Mobile SDK v18.8.0-beta02 is available for Android.

This version contains the following changes:

• Reliability improvements and bug fixes.
• The minimum supported version of Android is 23.

reCAPTCHA Mobile SDK 18.8.0-beta01 is now available for iOS.

This version contains the following changes:

• Support for Swift 6 and Xcode 26.0 beta01.
• Minimum supported version is set to iOS 15 in accordance with https://developer.apple.com/support/xcode/ for Xcode 16.

reCAPTCHA Mobile SDK v18.8.0-beta01 is now available for Android

This version contains reliability improvements and bug fixes.

reCAPTCHA Mobile SDK v18.7.1 is now available for Android

This version contains reliability improvements in the execute() method.

reCAPTCHA SMS defense (formerly SMS toll fraud protection) is now available in GA. For more information, see Detect and prevent SMS fraud.

reCAPTCHA Mobile SDK v18.7.0 is now available for iOS.

This version contains the following changes:

• Public API is moved to Swift along with support for Objective-C.
• New integration architecture with RecaptchaInterop for Firebase clients.

Change

reCAPTCHA Mobile SDK v18.7.0 is now available for Android.

This version contains a dependency on com.google.android.gms:play-services-recaptchabase for enhanced detection.

You can use custom constraints with Organization Policy to provide more granular control over specific fields for some reCAPTCHA resources. For more information, see Use custom organization policies for reCAPTCHA keys and firewall policies.

reCAPTCHA express is now available in GA. For more information, see Set up reCAPTCHA express.

Configuring allowlists for IP addresses is now available in GA. This feature lets you add the trusted IP addresses to an allowlist to exclude them from reCAPTCHA enforcement. For more information, see Configure an IP address allowlist.

reCAPTCHA Mobile SDK v18.7.0-beta01 is now available for iOS.

This version contains the following changes:

• Mitigation for an issue that caused a crash after updating to v18.6.0.
• Public API is moved to Swift along with support for Objective-C.
• New integration architecture with RecaptchaInterop for Firebase clients.

reCAPTCHA Mobile SDK v18.7.0-beta01 is now available for Android.

This version contains a dependency on com.google.android.gms:play-services-recaptchabase for enhanced detection.

reCAPTCHA Mobile SDK v18.6.1 is now available for Android.

This version contains the compatibility fix for Android 6 and earlier.