ArrivedOn the roadToday
250 Front Street West
Toronto · arrival 11:56Toronto · departure 11:38
+8%
3.12km
0.60kWh
5.20km/kWh
+0.10regen
wattata
Understand every kilowatt of your EV directly on your iPhone.
What is wattata?
Your car’s screen shows the consumption of the moment, then moves on. wattata keeps every drive and every charge, and makes your electric car easy to read at last, from efficiency to battery health. For calmer driving, a battery that stays in shape and lower costs: you see what drives up your consumption and what each charge really costs you.
It works as two apps. The car app, on its built-in screen if it runs , quietly records while you drive and while it charges. The iPhone app analyzes all of it, with no cloud and no account, turns them into clear numbers and tells you what they mean.
Every drive, in detail
From start to finish: the energy used, your efficiency, regeneration and what it took from the battery. Montréal to Québec City, 250 km: 48 kWh and 5.2 km/kWh, regeneration included.
September
452km−19%vs August
10 drives · 7 of 23 days · 65 km per day
91.2kWhEnergy
5.0km/kWhEfficiency
114kmLongest
12°CTemperature
By day of the weekaverage
M
T
W
T
F
S
S
Understand them
Your efficiency week after week, what made it change, and where you stand among drivers of the same model.
EfficiencyThis week
4.8km/kWh−7%
5.9
TFSSMTW
Best weekAug 21 · 2 drives
6.2km/kWh
What had an impactLast 30 days
- Regeneration
- Ascent
- Stopped
- Accelerations
- Temperature
Rankingsame model
5thof 18
avg. 5.6
bestworst
4.8km/kWh
Ranked on this week’s drives, same climate
The real price of every charge
At home or on the road: the energy added, the power, the range gained and what it cost. The car plugged in overnight in the driveway: 27.7 kWh, 162 km, $2.40.
ChargedChargingToday
1422 Lake Ontario Parkway
58.0%60.8%
+2.51kWh+13km5.1kW
September
88.2kWh
5 charges · every 6 days
$7.65Cost
17.6kWhPer charge
27.7kWhLargest
+21ptsTypical depth
HomeSat, Sep 19
44.6%75.9%
+27.7kWh+162km$2.404 h 04
Set your charging profiles
Home, Work, or a network you use: each profile carries its price per kWh, fixed or by the hour. Charges made there take it, and each one gets its cost, kWh by kWh. A month exports by profile, for an expense report.
Profiles
- Home1422 Lake Ontario Parkway$0.158/kWh
- Work250 Front Street West$0.21/kWh
- Road trips200 Main Street and 2 more$0.57/kWh
- New profile
Home
Other hours$0.158
Time range 1
23:00 to 07:00Every day$0.028
Time range 2
07:00 to 23:00Weekends$0.078
Add a time range
Each kWh takes the price of the hour it went in. When two ranges overlap, the first one wins.
HomeTue, Sep 22
+24.6kWh$1.93
Estimated at the price of the Home profile.
Other hours8.9 kWh × $0.158$1.41
23:00 to 07:0018.4 kWh × $0.028$0.52
On a Level 2 charger the car’s onboard charger returns about 90% of what it draws: to put 24.6 kWh in the pack it drew 27.3 kWh from the outlet, and that is what the meter bills.
A whole trip on one page
Give it a name and dates: the drives and charges that fall inside gather there, with the trip’s distance, energy and cost. The page reads day by day, and a drive that doesn’t belong comes out with one swipe. With no end date, the trip takes in everything until you close it.
Gaspésie
From Oct 10, 07:00 to Oct 12, 19:30
1,448km
9 drives · 18 h 05 of driving
283.9kWhEnergy
5.10km/kWhEfficiency
$52.10Electricity
5 charges · 228.4 kWh
Days
- Saturday, October 103 drives · 2 charges · 702 km
- Sunday, October 113 drives · 1 charge · 42 km · 1 removed from the trip
- Monday, October 123 drives · 2 charges · 704 km
Sunday, October 11
3 drives · 1 charge · 42 km
- 09:40Hotel → Anse-à-Beaufils8.3km
- 12:15Anse-à-Beaufils → Quai de Percé8.6km
- Quai de Percé+14.2kWh$2.85
- 17:30Quai de Percé → Grande-Rivière25.1km
- 1 removed from the trip
Your travel expenses, ready
Every drive is logged: the date, the time, from where to where, the distance. Tag your work drives Business and the month exports on its own, ready for your expense report. A business trip comes out as one PDF report, drives and charges together, and everything opens in a spreadsheet too.
October
- Tue, Oct 6 · 10:05 AMBusinessWork → 88 Queens Quay West6.2km
- Wed, Oct 7 · 7:52 AMHome → Work18.4km
- Thu, Oct 8 · 1:15 PMBusinessWork → 4700 Keele Street21.3km
Export
Business
All drives
wattata-drives-business-2026-10.csv2 drives · 27.5 km
Quebec City conference
Oct 14 to 16 · 6 drives · 2 charges
512kmDistance
$18.40Energy cost
PDF report
Get a report about your battery health
Day after day, wattata follows your state of charge, your charging habits and parked drain to estimate the real capacity of your battery.
September
2026
2026
monitoring in progress
27/ 27
MTWTFSS
- State of charge
- Charging habits
- Parked drain
- Estimated capacity
- Range per charge
Tips drawn from your own habits
When a habit costs you kilometers or wears the battery, wattata shows you what it measured and tells you what to change. One tip at a time, at the top of your drives or your charges, and nothing when all is well.
Tip
Set a departure time
On 5 of your last 7 nights at home, the battery stayed full about 6 h before you left.
Set the departure time to 07:45 in the car: charging will finish just before.
Batteryabout 6 h less full per night
Tip
Short drives in the cold
Below 5 °C, your drives under 5 km use 1.8 times more for the same distance than your longer drives.
Grouping short errands, or using the heated seat and steering wheel rather than hot air, keeps most of it.
Savingsup to 45 km of range per month, about $1.40
All tips
Charging and parking
- Set a departure time
On 5 of your last 7 nights at home, the battery stayed full about 6 h before you left.
- A lower charge limitRespected
Limit at 80%.
- Plug in more oftenRespected
Charges of about 25 points.
- Regeneration held backRespected
No departure above 95% this month.
Driving
- Short drives in the cold
Short drives in the cold: 1.8 times the consumption of longer ones.
- Brisk accelerations
After 10 measured drives (6 so far)
And also
While the car is parked
- Parked loss
The kWh the car loses overnight while parked, averaged over 30 days.
- Ready on time
Set your departure time, wattata works out when to plug in.
- Weather
How the weather affects your range, tonight and tomorrow.
Your car
- Mileage forecast
How far you’ll have driven by December 31 at your pace and, on a lease, by its end, against its mileage cap.
- Tire rotation
When the next one is due, at your pace, or after 12 months.
On your iPhone and in the car
- CarPlay
Your current drive on the car’s screen.
- Widgets
The car’s charge and range, and your week’s efficiency, on your iPhone’s Home Screen.
- Locate vehicle
Where the car is parked, if you turn the option on.
Got an idea? Suggest it from the app.
Your privacy by design
- Everything stays on this iPhone
- No account, no password
- No tracker: no analytics kit, no crash reporter
- Nobody at wattata can read your drives
- Your drives go from the car to your iPhone over Bluetooth, not over the internet
What wattata doesn’t do
- Make you create an account, or sign in to link the car and the iPhone
- Send your drives and charges to a cloud to analyze them
- Draw every road you take on a map
- Keep your driving history on our servers
- Chase you with notifications, streaks or badges to keep you coming back
- Give you a score, or judge the way you drive
How it works
Two minutes, no account.
- 1Install wattata in your car Soon
On your car’s screen, get the app from Google Play. Your car needs .
- 2Install wattata on your iPhone Soon
Get the app from the App Store.
- 3Scan, then drive
Scan the code shown in the car with your iPhone. No account: the car and the iPhone link up directly.
Common questions
- Is wattata affiliated with Polestar, Volvo or Google?
No. wattata is an independent app, designed in Québec. The brands are named to say where Android Automotive OS runs, nothing more.
- Which cars are compatible?
Those whose screen offers Google Play, thanks to . Your car is not on the list? .
- Can wattata act on my car?
No. The car app reads its battery and driving data and records it. It sends the car no commands.
- Where does my data go?
To your iPhone. The analysis happens there, with no cloud and no account. Two options, if you turn them on, send a minimum to our servers: the car’s last position for “Locate vehicle”, and an efficiency summary for the fleet comparison. The details are in the privacy policy.
- Do I need a data plan for my car?
No. The car app sends what it records to your iPhone over Bluetooth, so wattata works without a connected services subscription. Only the “Locate vehicle” option uses the car’s connection, if it has one.
- What if I change iPhones?
You scan the car’s code with the new iPhone, and it sends over what it recorded: your drives and your charges.
Your car knows a lot about how you drive. wattata tells you.
For electric vehicles with
Available soonon the App Store
We’ll write once, when wattata launches.
You're on the list.