Log EV charge sessions with your camera. Track efficiency over time.
4.88·9 reviews·100+ downloads
About WattLog
WattLog is an auto & vehicles app developed by The UX Guy.
Download Statistics
WattLog has been downloaded 130 times. In the last 30 days, the app was downloaded 4 times.
User Ratings
WattLog is rated 4.88 out of 5 stars. The rating is based on 9 ratings.
App Information
WattLog is FREE to download. The APK download size is 18.59 MB. The latest version available is 1.3.1. The last update was on August 3, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play May 2026.
Description
WattLog turns your EV's data screen into a structured log — just point your camera at 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. Initial release was trained on the Nissan Ariya but the app will learn your vehicle UI and improve with each user submission.
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!
Recent changes: - Update Android API version - Update Google Play Billing API version
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Easy to use. Just use it before you charge. OCR of the "Since Last Charge" screen works well. Enter the date and charging cost. You can also force it to take a picture and edit data it may not have recognized properly. This gives you a good idea of your drive efficiency over the last 10 days. Can compare to gas prices too which is fun. I wish there was an option to show graphs for longer like a month just to look for patterns but the data can be exported as a csv and viewed that way too.
★★★★★Squaredly· May 8, 2026
Really impressed with Watt log. The UI is clean and intuitive, and it makes tracking charging sessions very straightforward.
★★★★★Alex Clark· May 9, 2026
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.
Google Play Rankings for WattLog
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Technologies used by WattLog
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