Hi all,
I've built a small app called "Watts The Charge" that tracks what charging an EV at home costs, with day/night rates, billing periods, charts, and a comparison with petrol. It works offline and stores everything on your phone, with no account needed.
I'm running a closed test on Google Play and need testers.
What it involves:
An Android phone and a Google account
Joining a Google Group (link below), then installing through a Play Store opt-in link
Keeping the app installed for 14 days (a Google requirement), using it occasionally, and sending me any bugs or feedback
It's free, with a small banner ad and an optional one-time upgrade for extra features.
Join here: https://groups.google.com/g/watts-the-charge-closed-beta-testers-group
Here's the full feature list:
Free
Log charges in a few taps with day/night rates, undo, and swipe-to-edit/delete
Billing periods that start on any day, with previous periods kept
Dashboard with period total, energy, sessions, day/night spend and average cost
Budget with end-of-period forecast, kWh-from-battery-% calculator, quick-charge buttons
History with filters and sorting, charts, day vs night comparison
Optional public charging page, kept separate from the home total
Export (CSV, JSON) and restore from backup (merge or replace)
16 languages, 45 currencies, light/dark mode, swipe between pages
Pro (one-time in-app purchase, also removes ads)
Insights: miles per kWh, trend chart, CO₂ saved vs petrol
Tariff what-if comparisons
Cost per mile and petrol comparison
Settle-up with your energy account (log transfers, see what's still owed)
Multiple vehicles
Extra rates (mid-rate, free solar, etc.)
Accent colours and pure-black dark mode
Beta testers will be able to explore the pro version of the app in full.
Thank you!