Simplify README to focus on user-friendly app description (#7)

Remove technical architecture details, tech stack, and scientific references. Add GitHub Releases download link and image placeholders for screenshots. README now emphasizes core features and diagnostic capabilities with a cleaner, more accessible presentation.

Co-authored-by: Claude Haiku 4.5 <noreply@anthropic.com>

Author: zabio3

README.md

@@ -1,254 +1,51 @@
 # EtherSense
 
-A native Android Wi-Fi environment analyzer with "Sixth Sense" sensory feedback features and scientifically-grounded network diagnostics. EtherSense goes beyond standard Wi-Fi analyzers by providing auditory, haptic, and visual feedback to help you intuitively understand your wireless environment.
+Wi-Fiネットワーク診断アプリ
 
-## Features
-
-### Core Analysis
-- **Signal Quality Assessment**: Real-time RSSI monitoring with quality percentage calculation
-- **Interference Detection**: Analyzes co-channel and adjacent channel interference from nearby access points
-- **Throughput Estimation**: Calculates real-world throughput using: `LinkSpeed x Quality x (1 - Interference) x 0.65`
-- **Channel Analysis**: Identifies channel congestion and recommends optimal channels
-- **Speed Test**: Measure actual download/upload speeds and latency
-
-### Scientific Network Diagnostics (NEW)
-Evidence-based network analysis using established wireless communication models:
-
-#### Distance Estimation (ITU-R P.1238)
-Estimates the distance to your router using the ITU indoor propagation model:
-```
-d = 10^((PathLoss - 20×log₁₀(f) + 28 - Pf(n)) / N)
-```
-- Supports multiple environment types (Residential, Office, Commercial, Open Space)
-- Shows confidence intervals and error margins
+![App Demo](docs/images/demo.gif)
 
-#### Throughput Prediction (Shannon-Hartley + MCS)
-Predicts network throughput using Shannon capacity theorem and IEEE 802.11 MCS tables:
-```
-C = B × log₂(1 + SNR)
-```
-- Shannon theoretical capacity
-- MCS-based practical throughput (802.11ax/ac/n tables)
-- Real-world estimation with protocol overhead
-
-#### Link Margin Analysis
-Evaluates connection stability using link budget calculations:
-```
-LinkMargin = RSSI - ReceiverSensitivity
-```
-- Stability levels: Excellent (>20dB), Good (>12dB), Marginal (>6dB), Unstable
-- Fade margin assessment for connection reliability
-
-#### Signal Trend Prediction
-Analyzes RSSI history to predict future signal quality:
-- Moving average and variance analysis
-- Linear regression for trend direction
-- 5-second quality prediction with confidence
-
-### "Sixth Sense" Features
-
-#### 1. Auditory Feedback (Geiger-Style)
-The app produces audio tones that vary in pitch and frequency based on signal strength:
-- **Strong Signal (-30 dBm)**: High pitch (880 Hz), fast repetition
-- **Weak Signal (-90 dBm)**: Low pitch (220 Hz), slow repetition
+## Features
 
-The audio feedback helps you locate optimal signal positions without constantly looking at the screen - like a Geiger counter for Wi-Fi.
+### リアルタイム信号モニタリング
+接続中のWi-Fiの信号強度(RSSI)、リンク速度、推定スループット、チャンネル干渉をリアルタイムで表示します。
 
-```
-Frequency = 220 + ((RSSI + 90) / 60) × 660 Hz
-```
+### スピードテスト
+ダウンロード/アップロード速度とレイテンシを測定。動画視聴、オンラインゲーム、ビデオ通話への適性も判定します。
 
-#### 2. Haptic Feedback (Interference Alert)
-Your device vibrates when channel interference is detected:
-- **Severe (>70%)**: Triple pulse pattern with maximum intensity
-- **High (>50%)**: Double pulse pattern
-- **Moderate (>30%)**: Single click
-- **Low (<30%)**: No vibration
+### ネットワーク診断
 
-#### 3. Visual Aesthetics (Glowing Orb)
-A custom Canvas-drawn visualization displays signal strength as a pulsating, glowing orb:
-- **Color Interpolation**: Red (weak) → Yellow (fair) → Green (excellent)
-- **Pulse Speed**: Faster pulse for stronger signals
-- **Glow Effect**: Multiple translucent layers create a neon glow effect
-- **Waveform Display**: Real-time RSSI history as an animated line graph
+#### 距離推定 (ITU-R P.1238)
+ITU（国際電気通信連合）の屋内電波伝搬モデルを使用して、RSSIからルーターまでの推定距離を算出します。住宅、オフィス、商業施設など環境タイプに応じた経路損失係数を適用。
 
-## Architecture
+#### スループット予測 (Shannon-Hartley)
+Shannon-Hartley定理による理論上の最大通信容量と、IEEE 802.11 MCSテーブルに基づく実効スループットを予測します。
 
-EtherSense follows Clean Architecture principles with MVVM:
+#### リンクマージン分析
+受信感度とRSSIの差分からリンクマージンを計算し、接続の安定性を評価します（Excellent >20dB / Good >12dB / Marginal >6dB / Unstable）。
 
-```
-app/
-├── data/
-│   ├── model/          # Data classes (WifiNetwork, SignalMetrics, SpeedTestResult)
-│   ├── source/         # WifiScannerDataSource (BroadcastReceiver)
-│   └── repository/     # WifiRepository, SpeedTestRepository, SettingsRepository
-├── domain/
-│   ├── analyzer/       # Scientific analyzers
-│   │   ├── WifiAnalyzerEngine
-│   │   ├── SignalQualityCalculator
-│   │   ├── ChannelAnalyzer
-│   │   ├── ThroughputEstimator
-│   │   ├── DistanceEstimator         # ITU-R P.1238 model
-│   │   ├── ScientificThroughputPredictor  # Shannon + MCS
-│   │   ├── LinkMarginAnalyzer        # Link budget analysis
-│   │   ├── SignalPredictor           # Trend analysis
-│   │   └── NetworkDiagnosticsAnalyzer  # Orchestrator
-│   ├── model/          # NetworkDiagnostics, DistanceEstimate, etc.
-│   └── usecase/        # ScanWifiNetworks, AnalyzeNetwork, RunSpeedTest
-├── presentation/
-│   ├── dashboard/      # Main screen with visualizations
-│   ├── speedtest/      # Speed test screen
-│   ├── diagnostics/    # Scientific diagnostics screen
-│   └── settings/       # Feedback toggles
-├── feedback/
-│   └── FeedbackOrchestrator  # Audio & Haptic feedback
-└── ui/
-    ├── theme/          # Dark futuristic theme
-    ├── components/     # Reusable UI components
-    └── canvas/         # GlowingOrbView, WaveformVisualizer, RadarSweepView
-```
+#### 信号トレンド予測
+過去のRSSI履歴から移動平均と線形回帰を用いて、近い将来の信号品質を予測します。
 
-## Technical Details
-
-### Signal Quality Calculation
-```kotlin
-Quality = when (rssi) {
-    >= -30 -> 1.0 (100%)
-    >= -50 -> 0.9 (90%)
-    >= -60 -> 0.75 (75%)
-    >= -70 -> 0.5 (50%)
-    >= -80 -> 0.25 (25%)
-    >= -90 -> 0.0 (0%)
-}
-```
+## Download
 
-### Interference Score
-Calculated using co-channel and adjacent channel overlap:
-- **2.4 GHz**: Channels 1, 6, 11 don't overlap; others have partial overlap
-- **5 GHz / 6 GHz**: Channels generally don't overlap
+[GitHub Releases](https://github.com/zabio3/EtherSense/releases) からAPKをダウンロードできます。
 
-The interference score is normalized using a sigmoid function to produce a 0-1 range.
+## Screenshots
 
-### Throughput Estimation
-```kotlin
-EstimatedThroughput = TheoreticalLinkSpeed × SignalQuality × (1 - InterferenceScore) × 0.65
-```
-The 0.65 factor accounts for protocol overhead (~35%).
+<!-- スクリーンショットを追加してください -->
+| ダッシュボード | スピードテスト | 診断 |
+|:---:|:---:|:---:|
+| ![Dashboard](docs/images/dashboard.png) | ![Speed Test](docs/images/speedtest.png) | ![Diagnostics](docs/images/diagnostics.png) |
 
-### Scientific Diagnostics Models
-
-#### ITU-R P.1238 Indoor Propagation Model
-Used for distance estimation from RSSI:
-```
-PathLoss = 20×log₁₀(f) + N×log₁₀(d) + Pf(n) - 28
-
-Where:
-- f: Frequency (MHz)
-- d: Distance (m)
-- N: Path loss exponent (Residential=2.8, Office=3.0, Commercial=2.2)
-- Pf(n): Floor penetration loss factor
-```
-
-#### Shannon-Hartley Theorem
-Theoretical channel capacity:
-```
-C = B × log₂(1 + SNR)
+## Privacy
 
-Where:
-- C: Channel capacity (bps)
-- B: Bandwidth (Hz)
-- SNR: Signal-to-noise ratio (linear)
-```
+- すべての処理はデバイス上でローカルに実行
+- データはサーバーに送信されません
 
-#### MCS (Modulation and Coding Scheme) Tables
-802.11ax MCS requirements (1 spatial stream, 20 MHz):
-
-| MCS | Modulation | Min SNR | Data Rate |
-|-----|------------|---------|-----------|
-| 0 | BPSK 1/2 | 5 dB | 8.6 Mbps |
-| 5 | 64-QAM 2/3 | 20 dB | 68.8 Mbps |
-| 9 | 256-QAM 5/6 | 32 dB | 114.7 Mbps |
-| 11 | 1024-QAM 5/6 | 38 dB | 143.4 Mbps |
-
-#### Link Margin Stability Thresholds
-| Margin | Stability Level |
-|--------|-----------------|
-| ≥ 20 dB | Excellent (very stable) |
-| ≥ 12 dB | Good (stable) |
-| ≥ 6 dB | Marginal (may experience drops) |
-| < 6 dB | Unstable (frequent disconnections) |
-
-## App Navigation
-
-The app consists of four main screens accessible via bottom navigation:
-
-| Tab | Screen | Description |
-|-----|--------|-------------|
-| Wi-Fi | Dashboard | Real-time signal monitoring, nearby networks, visual feedback |
-| Speed | Speed Test | Download/upload speed measurement, latency testing |
-| Diagnose | Diagnostics | Scientific network analysis with detailed/simple modes |
-| Settings | Settings | Language, haptic feedback, and other preferences |
-
-The Diagnostics screen offers two display modes:
-- **Detailed Mode**: Shows all scientific data (formulas, MCS index, confidence levels)
-- **Simple Mode**: Quick overview with key metrics only
-
-## Requirements
-
-- **Android SDK**: API 26+ (Android 8.0 Oreo)
-- **Target SDK**: API 35 (Android 15)
-- **Permissions**:
-  - `ACCESS_FINE_LOCATION` - Required for Wi-Fi scanning
-  - `ACCESS_WIFI_STATE` - Read Wi-Fi information
-  - `CHANGE_WIFI_STATE` - Trigger Wi-Fi scans
-  - `VIBRATE` - Haptic feedback
-  - `INTERNET` - Speed test functionality
-
-## Building
-
-1. Clone the repository
-2. Open in Android Studio (Hedgehog or newer recommended)
-3. Sync Gradle files
-4. Build and run on a device (emulator won't have Wi-Fi scanning)
+## Build
 
 ```bash
 ./gradlew assembleDebug
 ```
 
-## Scan Throttling
-
-Android 9+ limits Wi-Fi scanning to 4 scans per 2-minute period. EtherSense:
-- Uses a 30-second minimum interval between scans
-- Displays cached results when throttled
-- Shows a notification when scan requests are throttled
-
-## Tech Stack
-
-- **Language**: Kotlin 2.0
-- **UI**: Jetpack Compose with Material 3
-- **DI**: Hilt
-- **Async**: Coroutines + Flow
-- **Permissions**: Accompanist Permissions
-- **Architecture**: MVVM + Clean Architecture
-
-## Privacy
-
-EtherSense does not:
-- Store your location data
-- Upload any data to servers
-- Track usage analytics
-
-All processing happens locally on your device.
-
-## Scientific References
-
-The network diagnostics features are based on established wireless communication research:
-
-- **ITU-R P.1238**: [Propagation data and prediction methods for the planning of indoor radiocommunication systems](https://www.itu.int/rec/R-REC-P.1238)
-- **Shannon-Hartley Theorem**: [Channel Capacity (Wikipedia)](https://en.wikipedia.org/wiki/Shannon–Hartley_theorem)
-- **MCS Index Tables**: [MCS Index (mcsindex.com)](https://mcsindex.com/)
-- **Link Budget Calculation**: [RF Link Budget Guide (Cadence)](https://resources.system-analysis.cadence.com/blog/rf-link-budget-calculation-guide)
-
-## License
-
-This project is for educational and personal use.
+Android 8.0 (API 26) 以上が必要です。