trustformers-mobile

Mobile deployment infrastructure for running transformer models on iOS and Android devices with hardware acceleration and cross-platform framework support.

Version: 0.1.0 | Status: Alpha | Tests: 1 | SLoC: 131,187 | Last Updated: 2026-03-21

Status

Alpha: Infrastructure is in active development. Core iOS and Android bindings are implemented; cross-platform framework integrations and on-device training are at alpha stability. 1 Rust integration test passing.

Features

iOS Support

• TrustformersKit: Native Swift framework for iOS/iPadOS/macOS
• Core ML Integration: Leverage Apple's Neural Engine for hardware acceleration
• Metal Performance Shaders: GPU acceleration via Metal compute shaders
• SwiftUI Components: Ready-to-use UI components for ML features
• ARKit Integration: AR object detection and scene understanding
• Privacy-First: On-device processing with no data leaving the device

Android Support

• Native Android Library: AAR package for easy Gradle integration
• NNAPI Integration: Android Neural Networks API for NPU/GPU/DSP acceleration
• Vulkan Compute: GPU acceleration with Vulkan compute pipelines
• Kotlin Support: First-class Kotlin APIs with coroutines
• Jetpack Compose: Modern UI components and reactive programming
• Edge TPU Support: Google Coral Edge TPU acceleration

Cross-Platform Features

• Model Management: OTA updates with differential downloads and rollback support
• Quantization: INT4, INT8, FP16 quantization for mobile efficiency
• Battery Optimization: Adaptive inference based on battery level and thermal state
• Memory Management: Efficient memory usage with automatic pressure handling
• Offline Support: Full functionality without internet connection
• On-Device Training: Federated learning with differential privacy

Framework Integration

• React Native: Turbo Modules with JSI support
• Flutter: Dart FFI bindings with platform channels
• Unity: C# bindings for AR/VR applications with IL2CPP compatibility
• Expo: Config plugin for managed workflow

Quick Start

iOS (Swift)

import TrustformersKit

let config = TFKModelConfig(
    modelPath: Bundle.main.url(forResource: "gpt2", withExtension: "bin")!,
    device: .neuralEngine,
    precision: .fp16
)

let engine = try TFKInferenceEngine(config: config)
let result = try await engine.generate(prompt: "Once upon a time")

Android (Kotlin)

import com.trustformers.mobile.TrustformersEngine

val engine = TrustformersEngine.Builder()
    .modelPath(modelPath)
    .device(Device.NNAPI)
    .precision(Precision.FP16)
    .build()

val result = engine.generate(prompt = "Hello, world!")
    .collect { token -> println(token) }

React Native

import { TrustformersModule } from 'trustformers-react-native';

const model = await TrustformersModule.loadModel('gpt2');
const result = await TrustformersModule.generate(model, 'Hello');

Flutter

import 'package:trustformers_flutter/trustformers.dart';

final engine = TrustformersEngine(modelPath: 'gpt2.bin');
await engine.load();

final result = await engine.generate('Once upon a time');

Installation

iOS (CocoaPods)

pod 'TrustformersKit', '~> 0.1.0'

iOS (Swift Package Manager)

dependencies: [
    .package(url: "https://github.com/cool-japan/trustformers-ios", from: "0.1.0")
]

Android (Gradle)

dependencies {
    implementation 'com.trustformers:mobile:0.1.0'
}

React Native

npm install trustformers-react-native

Flutter

dependencies:
  trustformers_flutter: ^0.1.0

Architecture

trustformers-mobile/
├── ios-framework/          # iOS Swift framework (TrustformersKit)
├── android-lib/            # Android AAR library
├── react-native-plugin/    # React Native Turbo Module
├── flutter-plugin/         # Flutter Dart FFI plugin
├── unity-package/          # Unity package (C# / IL2CPP)
├── src/                    # Shared Rust core
│   ├── ios.rs             # iOS FFI bindings
│   ├── android.rs         # Android JNI bindings
│   ├── model_manager.rs   # Model lifecycle management
│   ├── battery.rs         # Battery-aware optimization
│   └── federated.rs       # Federated learning
└── examples/
    ├── ios_demo_app/      # SwiftUI demo app
    ├── android_demo_app/  # Jetpack Compose demo app
    └── react_native_app/  # React Native demo

Performance

iOS Benchmarks

Android Benchmarks

Hardware Support

iOS

• Neural Engine: A12+ (iPhone XS and newer)
• Metal: All devices with iOS 14+
• Core ML: iOS 14+ for optimized inference

Android

• NNAPI: Android 8.0+ (API 27+)
• Vulkan: Android 7.0+ on supported devices
• Edge TPU: Devices with Google Coral

Feature Flags

• ios — iOS Swift framework and Core ML bindings
• android — Android JNI/NNAPI bindings
• coreml — Core ML model conversion and inference
• nnapi — Android Neural Networks API delegate
• tflite-nnapi — TensorFlow Lite NNAPI backend
• on-device-training — Federated learning and LoRA training
• web — WebAssembly/WebView bridge
• react-native — Turbo Modules / JSI bindings
• flutter — Dart FFI plugin
• unity — C# / IL2CPP bindings
• expo — Expo config plugin
• mobile-optimized — Battery, thermal, and memory pressure optimizations

Testing

# Run Rust tests
cargo test --all-features -p trustformers-mobile

# Test iOS framework
cd ios-framework && swift test

# Test Android library
cd android-lib && ./gradlew test

# Device farm integration
cargo test --features device-farm-integration

Development

Building iOS Framework

./build-ios.sh
# Output: target/TrustformersKit.xcframework

Building Android AAR

./build-android.sh
# Output: target/trustformers-mobile.aar

Known Limitations

• Alpha status: API surface may change before 0.2.0
• Core ML Neural Engine requires iOS 16+ for latest features
• NNAPI performance varies significantly across Android devices
• Large models require quantization for mobile deployment
• Federated learning requires network connectivity

Future Enhancements

• Enhanced quantization methods (INT2, GGUF)
• Better thermal management algorithms
• More AR/VR integrations
• Real-time collaboration features
• WebNN integration for future platforms

License

Licensed under Apache License, Version 2.0 (LICENSE).

Last Updated: 2026-03-21 Version: 0.1.0 Status: Alpha Test Suite: 1 Rust integration test SLoC: 131,187 Platforms: iOS 14+, Android 8.0+ (API 26+)