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About WattLog

WattLog turns your EV's data screen into a structured log — just photograph the display and let the app capture the numbers.

Each session records starting battery, distance driven, average efficiency, remaining range, drive time, average speed, ambient temperature, and charging location. Add cost per kWh for spend tracking over time and compare to gasoline powered vehicles in your region.

Features
• OCR-powered data entry — point your camera at the charge screen, review, and save
• Charge history with per-vehicle filtering and swipe-to-delete
• Efficiency and range trends over time
• Drive summary analyzes your costs versus gasoline in your region
• Supports multiple vehicles with a default selector
• Home and away charging distinction
• Imperial and metric unit support
• Settings sync across devices via your Google account
• Dark, light, and system theme

Designed for
EV owners who want a clean record of their driving and charging habits without manual entry or spreadsheets. Current release is trained on the Nissan Ariya.

Sign in with Google, email, or skip the sign in to get started immediately. Your data is downloadable.

Coming soon, share logging of the same vehicles with others in your household!

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author
First impression is how super clean the user interface is. The app is very easy to navigate and understand. Haven't logged any charges yet, but will update this review as I gather more data.
Paxton Hinders
author
Dev has done a phenomenal job making an easy to use yet powerful EV efficiency tracking tool. The OCR. makes it simple to input each charge session. The cherry on top is that everything is local.
Alex Clark
author
Really impressed with Wattlog. The UI is clean and intuitive, and it makes tracking charging sessions very straightforward.
Squaredly
author
Actually surprised by how fast the scanning is. I just point my camera at the dash and it grabs the data immediately, no manual typing required. So much easier than writing to a spreadsheet. Can't wait for t...
Frankie Vail