Your real cost per 100km, finally honest
VoltMerric anchors on the money you actually paid and the distance you actually drove β stripping out charging loss, sentry drain, A/C idle and tiered pricing β to reveal your true energy cost. Works for EVs and fuel cars alike.
Two consecutive charges to a similar level is all it takes. The more you log, the more accurate it gets.
A focused, glanceable dashboard
Dark-first design with a cyan accent, built to read in a glance
Cost truth, by design
Not single-charge guesswork β anchored differences between real fill-ups
Anchored algorithm
Cost is computed from the difference between two consecutive charges at a similar level, so loss, sentry mode and idle drain are cancelled out automatically.
Short-charge pool
Topped up only a little this time? Mark it as a short charge β its amount is pooled into the next full charge instead of skewing a single interval.
Trend chart
See how summer A/C, winter heating and highway driving move your real cost per 100km over time.
EV and fuel cars
Track electric and fuel vehicles side by side. The whole app adapts its wording β η΅θ΄Ή/ζ²Ήθ΄Ή, ε η΅/ε ζ²Ή β per vehicle.
Built thoughtfully
Private, bilingual and right at home on iOS
Dual powertrain
Electric or fuel, each vehicle is tracked independently with its own battery chemistry or fuel grade.
Private by design
No account, no analytics, no tracking. Your data lives on your device by default.
Optional iCloud sync
Turn on iCloud to back up and sync across your devices via Apple's private CloudKit database. Off by default.
Bilingual
Full Simplified Chinese and English, following your system language with an in-app switch.
Light & dark
System, light or dark appearance β switch any time from Settings.
Home-screen widget
Glance at your main vehicle's real cost per 100km right from the Home Screen.
How it works
Add. Log. Unlock. It gets smarter every charge.
Add a vehicle
Create an EV or fuel car. Each vehicle keeps its own isolated history.
Log the baseline
Enter your first charge β odometer, amount paid and charge level. This becomes the baseline.
Unlock real cost
On your second charge, VoltMerric computes the true cost for that interval and activates your dashboard.
Know what driving really costs
Download VoltMerric and turn fuzzy estimates into the real number β for every car you drive.
Download from App Store