VoltDiary

VoltDiary is a smart battery health analyzer that automatically tracks your charging sessions and provides actionable insights to extend your battery lifespan. Unlike generic battery apps, VoltDiary focuses on understanding your unique charging behavior patterns and helps you build healthier charging habits.

🔋 AUTOMATIC CHARGING TRACKING
Runs silently in the background and automatically records every charging session. No manual logging required. Each capture includes: start time and battery level, end time and battery level, total duration, and charging speed analysis.

📊 CHARGING HABIT SCORE
Your charging behavior is quantified into a score from 0 to 100. The algorithm considers average start level, average end level, overcharging frequency, and deep discharge events. Track your progress and see how your habits improve over time.

📈 COMPREHENSIVE ANALYTICS
Visualize your patterns with interactive charts: start level distribution showing when you typically plug in, end level distribution showing when you unplug, weekly session trends, daily averages, and charging speed monitoring.

📜 CHARGING HISTORY TIMELINE
Browse your complete charging history in a beautiful timeline interface. Each session card displays date and time, start and end battery levels, duration, overcharge and deep discharge warnings, and color-coded health indicators.

🧠 SMART INSIGHTS & RECOMMENDATIONS
VoltDiary delivers personalized insights: detects harmful patterns like overnight overcharging above 95%, identifies deep discharge events below 20%, provides actionable recommendations to improve battery health, and calculates your optimal charging range.

⚠️ HARMFUL HABIT DETECTION
Automatically flags potentially damaging behaviors: overcharging alerts, deep discharge warnings, long session detection, and suboptimal range alerts to help you build better habits.

🎯 DASHBOARD OVERVIEW
At-a-glance battery health view featuring a glowing score ring indicator with color-coded performance level, last session summary with duration and level change, quick stats for average start/end levels, and session counters.

📱 FIVE CORE SCREENS
1. Dashboard — command center with score ring and key metrics
2. Charging History — complete timeline of all recorded sessions
3. Analytics — visual charts and data distributions
4. Smart Insights — personalized tips and recommendations
5. Settings — customize theme

🎨 BEAUTIFUL DESIGN
Dark and light themes with smooth transitions, glowing battery indicators and animations, card-based minimalist interface, and responsive layout for phones and tablets.

🔒 PRIVACY FIRST — YOUR DATA STAYS ON YOUR DEVICE
100% offline — no internet permission required. All data stored locally using Hive encrypted database. No accounts, no sign-in, no registration. No third-party analytics or tracking SDKs. Delete all data anytime from Settings.

⚙️ REQUIRED PERMISSIONS
RECEIVE_BOOT_COMPLETED — resume tracking after device restart. Battery monitoring uses Android BatteryManager public API — no permissions required.

WHO IS VOLTDIARY FOR?
Regular users wanting longer battery life, tech enthusiasts interested in data-driven analysis, Android users experiencing battery degradation, and anyone curious about their charging habits.

WHY CHOOSE VOLTDIARY?
Automatic tracking, data-driven insights, privacy guaranteed, beautiful analytics dashboard, free and lightweight with minimal device impact.

Download VoltDiary today and start building healthier charging habits for a longer-lasting battery.