Ev Analyzer - EV Health doctor

Ev Analyzer connects to your electric vehicle through an ELM327 OBD2 adapter and gives you real-time diagnostics, cell-level insights, guided battery tests and professional health reports right on your phone.
The best part? It’s completely free with no ads. 100% free for everyone.

See every cell in your battery pack
Most EV owners only see a single SoC value. Ev Analyzer goes deeper. On supported vehicles, the app reads individual cell voltages and displays them in a clean bar chart. Spot weak cells, detect imbalance and understand what is really happening inside your battery.

Know your battery’s real condition
Battery Health Check gives you a complete assessment of your pack. It analyzes State of Health, cell balance, voltage, current, capacity, temperature, 12V battery data and vehicle-specific values where available. Each metric gets its own score, combined into an overall grade from A to F.

Test your battery under real load
Battery Run and Battery Load Test show how your pack behaves while driving, discharging or accelerating. Track cell voltage spread, current, voltage sag, power and temperature under load. The app can estimate pack resistance and reveal weak cells that may look normal during a static scan.
Find persistent weak cells
One scan can show temporary imbalance. Ev Analyzer can track weak-cell patterns across repeated tests, helping you identify cells that keep appearing as weak over time.

Live data while you drive or charge
Watch SoC, pack voltage, current, power flow, available charge/discharge power and multi-sensor temperatures update continuously. On supported vehicles you can also see remaining usable energy, 12V battery voltage and detailed cell data.

Monitor charging sessions
Charging Monitor tracks charge power, energy added, battery temperature, voltage, current and taper behavior so you can see how your EV charges in real conditions.

Check thermal and 12V performance
Thermal Performance helps you see how the battery heats under load and cools afterwards. The guided 12V test checks resting voltage, voltage drop, recovery and READY-mode regulation where data is available.

Read and clear fault codes
Read stored, pending and permanent diagnostic trouble codes from your vehicle. A built-in manufacturer-aware DTC catalog explains what codes mean, and you can save a scan before clearing codes from the app.
Compare with the community
Optional community comparison lets you compare your battery health and load-test results with similar vehicles and battery sizes. Sharing is opt-in and pseudonymous.

Export professional reports
Generate detailed battery health reports with score breakdowns, cell voltage charts, temperature data, charge statistics, capacity analysis and diagnostic context. Share them with a buyer, mechanic or keep them for your records.

Adapter quality test
Not all ELM327 adapters are reliable. Ev Analyzer includes an adapter quality test to help identify slow, unstable or incomplete adapters before deep EV diagnostics.

What you need
An ELM327-compatible OBD2 adapter
An Android device
A supported EV
Supported vehicles
Ev Analyzer supports a growing list of EVs.

Key features
Individual cell voltage display
Battery health scoring with letter grade
Battery Load Test with pack resistance analysis
Battery Run discharge monitoring
Persistent weak cell tracking
Real-time dashboard
Charging session monitor
Thermal performance test
12V battery and DC/DC checks
Cell voltage spread analysis
Diagnostic trouble code reading and clearing
Manufacturer-aware DTC descriptions
Optional community comparison
Adapter quality test
Exportable battery health reports
Bluetooth, BLE and WiFi ELM327 support