T4U Battery Edition — your Tesla's battery health, measured every day.
Built by MyBatteryHealth, Europe's leading EV battery diagnostic network. Over 70,000 certified batteries, CARA Europe compliant.
Finally know the real state of your battery.
Not an estimate. Not a charge percentage. The SOH — State of Health — of your battery, calculated from official Tesla Fleet API data and the MBH algorithm validated on tens of thousands of vehicles.
WHAT YOU GET
— Accurate SOH percentage, grade A→E
— Real pack capacity (kWh) vs new capacity
— Real range calculated from your driving data
— Degradation history with 12-month evolution curve
— Daily automatic measurement, without ever waking your car
— Manufacturer warranty tracking: duration, mileage, SOH threshold
— Battery chemistry, supplier, charging recommendations
— Supercharger V2/V3 compatibility, max power
— Real-time data: charge, locked status, sleep mode
— Anomaly detection alerts
NEW IN V8: SHAREABLE BATTERY CARD
Generate your certified score and share it on social media. An Instagram-ready card with your grade, SOH, mileage, and the "Certified by MyBatteryHealth" stamp. Premium = unlimited shares.
PHILOSOPHY: RESPECT YOUR TESLA
Unlike other Tesla apps, T4U Battery Edition never wakes your car in the background. Only one daily measurement, triggered when you open the app. Your 12V battery will thank you.
OFFICIAL MBH REPORT
Generate a signed MyBatteryHealth battery health PDF certificate — recognized by automotive professionals, fleet operators, and used vehicle buyers. Essential for maximizing your Tesla's resale value.
T4U PREMIUM
Unlock exact SOH, full history, monthly capacity recap, personalized charging recommendations, and unlimited battery card sharing for €1.99/month or €14.99/year.
Battery card (1 free share), battery grade, and real-time data: free, always.
Terms of Use: https://tesla-4u.com/en/privacy-legal/
Privacy Policy: https://tesla-4u.com/en/rgpd/
I was using this app on my M3 along with another iOS app Stats for Tesla. I’ve been using both apps about a month now and have been consistently losing about 20 miles of range each 24 hour period. I did an experiment whereby I changed my main Tesla password and reloaded each app individually. I discovered that Stats for Tesla did not contribute to vampire drain whatsoever. However, this app Tesla 4 U contributed significantly to vampire drain at the rate of anywhere from .66 to 1.2 miles per hour which is unacceptable. By the way, without this app polling my car I lost no range after 11 hours. Although this app has some nice features and it’s free, I can’t recommend due to the high vampire drain rates.
Developer Response
Try our new version with scheduled request. There is NO vampire drain
Just doesn't work..
meites
Literally you cannot get information at allOnce you login it will log you out once a day and and tell you the token is invalid there's nowhere to really refresh the token which I'm not sure why any application you refresh a token every single day. (they're actually actually is no place to do that)All I can tell is don't waste your money.. this is a horrific execution of an application..
Very handy
emorog
I wanted two main things from this app and it delivered. Charging status and logs and driving efficiency logs. These both work very well!On peculiarity is that the "parked" event updated every 1.5 hours or so during the night. I'm not sure if it was caused by GPS drift, or something else waking it up and registering a new "parked" event. I haven't tested long enough to see if it contributes to vampire drain or not. But I don't see any controls for polling frequency as was suggested by the dev response to another review.Update: I just found the charts for driving and charging! So very cool!This was not immediately obvious so, Open an event, like driving. It will show a map. (cool, right?) Now expand the arrow at the bottom of the screen to see the details. Then swipe L/R to see the charts!
The app we’ve long waited for!!
Philkun
Finally an app that tracks (and logs !) all stats such as speed, battery consumption, trip maps, etc. accurately. Kudos! Keep the updates coming. I’d definitely be willing to pay for this, too.
T4U Battery Edition — Version 8.4
This major update refocuses T4U on its core promise: knowing your Tesla battery's true health.
NEW
- Shareable battery card: generate your certified score and share it on social media (Premium = unlimited)
- Monthly battery recap: track capacity evolution month after month
- Passive polling mode: T4U never wakes your Tesla in the background — only one daily automatic measurement
- Improved Tesla recognition: Model S/X/3/Y/Cybertruck via VIN
- Auto-modernization of trim badges (100D → Long Range, P100D → Plaid)
IMPROVEMENTS
- Simplified dashboard focused on battery health
- More accurate SOH measurement with chemistry normalization
- Abnormal degradation notifications
- 12V battery preservation
FIXES
- SOC display after long sleep
- Widget stability
- iCloud history sync
Version 8.4
The developer, VIA - Vehicle Information application, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
VIA
Size
2.3 MB
Category
Utilities
Compatibility
Requires iOS 17.7 or later.
iPhone Requires iOS 17.7 or later.
iPad Requires iPadOS 17.7 or later.
Mac Requires macOS 14.7 or later and a Mac with Apple M1 chip or later.
