iBeacon vs AltBeacon

iBeacon vs AltBeacon: A Comprehensive Comparison

iBeacon is Apple's proprietary BLE beacon advertising format, introduced in 2013. AltBeacon is an open-source alternative specification created by Radius Networks in 2014, designed to replicate iBeacon's functionality without Apple's proprietary constraints. While they are functionally very similar — both encode a ATT">UUID-like identifier and major/minor values in BLE advertising packets — their licensing, ecosystem support, and extensibility differ significantly.

Overview

iBeacon embeds a 20-byte payload in the BLE Manufacturer Specific Data field with Apple's company identifier (0x004C). It defines fields for a 128-bit Proximity UUID, 16-bit Major, 16-bit Minor, and 1-byte TX Power. Apple introduced iBeacon as part of iOS 7's Core Location framework and requires use under Apple's iBeacon license agreement (part of the iOS Developer Program). Android devices do not natively support iBeacon as a BLE profile; third-party SDKs are required.

AltBeacon was created by Radius Networks as a fully open specification (MIT license, published at altbeacon.org). It uses a different AD type structure that avoids Apple's manufacturer-specific data byte sequence. AltBeacon's payload is structurally identical in function to iBeacon — a 16-byte Beacon Code (analogous to iBeacon's Proximity UUID), 4-byte ID1 (Major equivalent), 4-byte ID2 (Minor equivalent), and 1-byte reference RSSI. It adds a "Reserved for Use by Manufacturer" (MFG RESERVED) byte for custom data and uses 0xBEAC as the beacon type code in the manufacturer-specific field. AltBeacon is explicitly designed to function identically to iBeacon on Android and iOS without Apple licensing requirements.

Key Differences

• Licensing: iBeacon requires agreement to Apple's license terms. AltBeacon is open-source (MIT license) with no licensing requirements or fees.
• Platform support: iBeacon has deep iOS Core Location integration (background ranging, geofencing, native notifications). AltBeacon is designed primarily for Android but has iOS support via the AltBeacon iOS library.
• Payload structure: Both encode UUID/Major/Minor/TX Power equivalents. AltBeacon adds 1 byte of manufacturer-reserved data and uses slightly different byte offsets in the advertising PDU.
• Identifier length: iBeacon's Major and Minor are 2 bytes each (16-bit range, 0–65535). AltBeacon's ID1 and ID2 are 4 bytes each (32-bit range), providing more granular namespace organization.
• Manufacturer data field: Both use the BLE Manufacturer Specific Data AD type, but with different company identifiers and type codes. iBeacon uses Apple's Company ID (0x004C); AltBeacon uses the deploying company's Company ID with the 0xBEAC type code.
• Android SDK: Radius Networks maintains the Android Beacon Library — the most widely used open-source Android beacon SDK, supporting AltBeacon, iBeacon, Eddystone, and other formats natively.
• iOS Core Location: iBeacon's region monitoring and ranging work natively in iOS background mode. AltBeacon on iOS requires foreground CoreBluetooth scanning; background operation is limited compared to iBeacon's Core Location integration.

Technical Comparison

Use Cases

When iBeacon Excels

• iOS-first applications with background ranging: Apps that need to trigger local notifications when users enter beacon regions in the background rely on iOS Core Location's iBeacon support. Android-equivalent background behavior requires more complex workarounds for AltBeacon.
• Apple ecosystem deployments: Retail environments targeting primarily iPhone users (luxury retail, Apple retail partners, hospitality) benefit from iBeacon's native iOS integration and the established developer tooling.
• Simple zone proximity applications: The UUID/Major/Minor hierarchy maps cleanly to multi-venue, multi-zone deployments (UUID = brand, Major = venue, Minor = specific zone). Both formats support this but iBeacon's iOS native behavior makes it simpler to implement background geofencing.

When AltBeacon Excels

• Android-first or cross-platform applications: Android Beacon Library's native AltBeacon support on Android, combined with iOS library support, makes AltBeacon the pragmatic choice for cross-platform development without Apple licensing friction.
• Open-source stack requirements: Government, healthcare, and enterprise procurement that requires open-source specifications with auditable code benefits from AltBeacon's MIT license.
• Custom manufacturer data: The 1-byte MFG RESERVED field can encode simple device state (charging, active, error) directly in the advertising packet without requiring a connection.
• Larger identifier space: Applications requiring 32-bit Major/Minor namespaces (more than 65,535 values per level) benefit from AltBeacon's 4-byte ID fields.
• Avoiding Apple license dependencies: Any deployment where the beacon hardware vendor or software provider needs to avoid Apple iBeacon licensing restrictions.

When to Choose Each

Choose iBeacon when: - iOS is the primary target platform and Core Location background region monitoring is required - The app relies on iOS's native iBeacon geofencing API without third-party SDK - The existing deployment ecosystem is standardized on iBeacon

Choose AltBeacon when: - Android is the primary platform, or true cross-platform support without platform-specific SDK dependencies is required - Open-source licensing is a hard procurement requirement - The 1-byte custom data field provides needed functionality - Apple licensing terms are a commercial or legal constraint

Practical note: Modern enterprise beacon hardware (Kontakt.io, Estimote, Minew) broadcasts both iBeacon and AltBeacon frames simultaneously in advertising rotation. Many production deployments are format-agnostic at the hardware level, with the format parsed by the receiving application SDK.

Conclusion

iBeacon and AltBeacon are functionally nearly identical beacon advertising formats — both encode the same essential proximity data (beacon identifier, major/minor subdivision, TX power) in BLE advertising packets. The meaningful differences are licensing (Apple proprietary vs. MIT open source), iOS vs. Android native support, and minor payload structure differences. For iOS-centric deployments leveraging Core Location background monitoring, iBeacon's native integration is compelling. For cross-platform deployments, open-source requirements, or Android-first applications, AltBeacon with the Android Beacon Library provides equivalent capability with fewer constraints.