takt - car glance
OBD-II car data at a glance
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
takt shows you the few numbers worth seeing while you drive, and a short read on the drive once you park.
Plug an ELM327-class Bluetooth LE adapter into your car's OBD-II port and takt reads what your car is actually doing: engine speed, oil and coolant temperature, load, turbo boost, battery voltage, fuel level. On an electric car, pack temperature and state of charge.
TWO REGISTERS
While you are driving, takt is an instrument. Large numerals, no chrome, nothing that asks for a second look. Once you park it becomes something to read: what the drive was, how long, how far, and the one thing worth noticing about it.
CARPLAY AND LOCK SCREEN
The same live values appear on CarPlay. During a drive, a Live Activity keeps distance and the value worth watching on your Lock Screen and Dynamic Island.
BUILT FOR THREE CARS, HONEST ABOUT THE REST
Three cars have been measured signal by signal against the vehicle itself, each with a purpose-built screen: the 2024 Toyota Tundra, the 2024 Volkswagen ID.4 and the 2026 BMW X3 M50.
Every other car gets the standard OBD-II reading. Most petrol and diesel cars will produce a working glance, because those values are part of the standard. What your car reports depends on the manufacturer, and takt only shows values it can actually read and trust. A missing number is takt declining to guess rather than takt failing.
Electric cars other than the ID.4 are the current gap. The values that matter on an EV are mostly manufacturer-specific rather than standard, so they have to be built one car at a time.
TRY IT WITHOUT A CAR
Tap SAMPLE DRIVE on the first screen. It replays a real recorded drive through the whole app, so you can see exactly what takt does before buying an adapter.
NOTHING LEAVES YOUR PHONE
No servers. No accounts. No analytics. No tracking. takt does not read your VIN.
Route recording is off until you turn it on. Leave it off and takt never asks for location. Turn it on and takt records where you drive into that drive's own log, on your iPhone — including while the screen is locked, with iOS showing its location indicator the whole time.
Drawing a map is the one thing takt sends anywhere: it asks Apple for imagery of the area shown. Nothing takt records leaves your phone. Session logs and trips are stored on your iPhone, visible to you in the Files app, and yours to delete.
WHAT YOU NEED
- An ELM327-class Bluetooth LE OBD-II adapter. Bluetooth Classic and Wi-Fi adapters will not work.
- A car with an OBD-II port, standard on essentially every car sold in the US since 1996.
- takt displays in landscape. Units follow your iPhone, and you can set metric, US or UK yourself.
takt reads diagnostic trouble codes. It does not clear them.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
On the BMW X3 M50, oil and intake-air temperatures are now checked against independent readings from the car itself, and shown without the ~ that marks an unconfirmed value.
With oil confirmed, the summary after an X3 drive can tell you how long the oil took to catch the coolant, and a cold morning start no longer fools that count.
The developer, Juergen Klaassen, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Location
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Juergen Klaassen
- Size
- 3.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Juergen Klaassen
