Fillwise

Closed Alpha now open on Android

Know when your car starts using more fuel.

Fillwise tracks your fuel economy tank by tank and tells you when it drops and stays down, which is often the first sign that something needs attention. It keeps your service schedule too, and everything stays on your phone.

Join the Closed Alpha See how it works

Free to test. Alpha testers get premium free when it launches. Android 8.0 or newer.

Fillwise home screen showing a mileage drop alert: 7 percent below normal for 3 tanks running, last 3 tanks 17.1 MPG against a normal of 18.4 MPG, with cost per mile, last fill, and an overdue engine air filter.

Diagnosis, not just a logbook

One bad tank is noise. Three in a row is a pattern.

Fillwise measures economy from one full tank to the next, so a partial fill is counted with the next full tank instead of skewing the numbers. When economy falls and holds over several tanks, you get an alert, along with the usual suspects to rule out first.

  • Know why it dropped? Say so: winter fuel, a change in your driving, or something else. The alert goes quiet, and comes back if mileage falls further or doesn't recover.
  • Fixed something? Log the repair, and after three tanks Fillwise tells you whether mileage came back.
Mileage drop detail: the last 3 tanks averaged 17.1 MPG, about 7 percent below a normal of 18.4. A bar chart compares 6 earlier tanks with the last 3, followed by things to rule out first such as winter-blend fuel and shorter, colder trips.

The rest of the app

Fill-ups, tanks, and service in one place.

Log fill-up form with odometer, gallons, price per gallon, and total, plus toggles for filled to full and skipped logging a fill-up.
Quick to logOdometer, then any two of fuel amount, price, and total. Fillwise works out the third. Missed logging a fill-up? Mark it, and the gap won't show up as a fake high MPG.
Tanks list showing each tank's date, distance, gallons, MPG, and percent difference from normal, with the three most recent tanks flagged.
Every tank, measuredEach full-to-full tank with its distance, fuel, economy, and how it compares to your normal.
Service screen grouping items into overdue, due soon, and OK, such as an engine air filter one month over and an oil change due in 412 miles.
Service on scheduleSet intervals by distance, time, or both, and see what's overdue or due soon. Keep a record of each service: date, odometer, cost, shop, and notes.
  • MPG (US)
  • MPG (UK)
  • L/100 km
  • km/L
  • Miles or km
  • US gal, UK gal, or liters
  • Your currency
  • Cost per mile or km
  • More than one vehicle

Private by design

Your driving data stays on your phone.

Details are in the privacy policy.

No internet permission

The app doesn't ask Android for network access, so it can't send your data anywhere.

No account

Nothing to sign up for. Open the app and add your car.

No ads, no analytics

Nobody is watching how you use it.

Backed up your way

Your data lives on your phone, and in your Android backup if you have backup turned on.

Closed Alpha

Help shape Fillwise before it launches.

Fillwise is in a closed test on Google Play. Join, log your real fill-ups, and tell us what works and what doesn't. Everyone in the Closed Alpha gets premium free when it launches.

  1. Join the tester Google Group
  2. Opt in on Google Play
  3. Install and log your fill-ups
Get the step-by-step