Battery Tracker

Battery Tracker is more than just a battery percentage display.
It's your personal battery coach, helping you understand your charging habits by tracking charge and discharge records, and discover ways to extend your battery's lifespan.

■ Real-time Battery Monitor
• At-a-glance view of battery level, charging, discharging, and full charge status with a large gauge
• Displays charging speed (%/h) and speed rating (Slow, Normal, Fast, Super Fast)
• Shows estimated time to target charge and full charge
• Displays discharge speed (%/h) while using the battery
• Real-time chart of recent battery level changes
• Provides battery status and charging tips for different charge levels
• Shows current charging session's start time, charged amount, and elapsed time

■ Automatic Charge & Discharge Logging
• Automatically records charging and battery usage as sessions
• Summarizes start/end times, battery levels, and duration
• Compares estimated vs. actual time to reach target charge
• View battery level change graphs in session details
• Name your chargers to differentiate them
• Records persist even if you close and reopen the app; all data is stored only on your device

■ Battery Analysis (Premium)
• Number of observed cycles calculated from charging records
• Recent average charging speed (%/h)
• Long-term charging speed trend graph for 7 days, 30 days, and all time
• Compare named chargers/cables by charge amount per hour (%/h)
• Estimated remaining usage time based on average discharge speed (Free)

■ Smart Notifications
• Charging cable disconnected alert (Free)
• Target charge level alert: Choose from 80, 85, 90, 95, 100% (Premium)
• Low battery alert: Set your own threshold between 5-25% (Premium)
• Do Not Disturb time settings, such as bedtime (Premium)
※ Notifications work while the app collects battery information. Due to iOS background policies, notifications may not be delivered immediately after the app is completely closed.

■ Charging Tools
• 5-minute real-time extended chart
• Custom charging plans tailored to your goals
• Charging speed diagnostics and battery care guide
• Premium users can use anytime; Free users can access for the current session by watching an ad

■ Data Export
• Export charging records as CSV files (Excel compatible)
• Export sessions and measurement samples as JSON files
• Option to delete all saved records at once

■ Battery Tracker Premium
• Remove all ads
• Observed cycles, long-term charging speed trends, charger/cable speed comparison
• Target charge level & low battery alerts, Do Not Disturb times
• Instant access to 5-minute real-time chart, custom charging plans, charging speed diagnostics
• Offers 1-month, 3-month, 6-month, 12-month auto-renewing subscriptions and a lifetime purchase option

■ Free Features
• Real-time battery monitor, charging speed, estimated full charge time
• Charge/discharge records and session details
• Estimated remaining usage time
• Cable disconnected alert
• CSV & JSON export

■ Privacy Policy
• Battery records and settings are stored only on your device.
• We do not transmit or sell your charge/discharge records to servers.

■ Please Note
• iOS only provides battery level and charging status information.
Temperature, voltage, current, power (W), and battery maximum capacity/health cannot be displayed due to iOS policy, and this app does not offer these features.
• Charging speed and estimated times are calculated estimates based on battery level changes and may vary depending on screen usage, heat generation, battery protection features, and cable/charger quality.
• The more charging sessions you record, the more accurate the analysis becomes.
• App-specific battery usage is not provided.

- Terms of Use: https://drendrendren.com/terms?app=battery-tracker
- Privacy Policy: https://drendrendren.com/privacy?app=battery-tracker

Healthy charging habits start with good records.

Recent changes:
• Added subscription plans
• Added permanent storage for charge and discharge sessions
• Added battery analysis feature
• Added smart notifications
• Added history analysis screen
• Added export functionality
• Added estimated time to target charge/discharge history
• Improved battery measurement accuracy