EVSim
Try electric cars on your own drives
Track the drives you already take, then see how different electric cars would have handled them: range, battery, charging and savings.
iPhoneFree to download
Independent iOS apps
Calm, well‑made utilities for iPhone.
MARVAR is an independent app brand for drivers. Each app does one job, explains in plain English how it treats your data, and stays out of your way.
The apps
Two apps, both for drivers.
Different jobs, the same approach: a clear purpose, honest limits and straightforward privacy pages.
ClustR – Display for Tesla
A live driver display on your iPhone
Turns an iPhone mounted in landscape into a live instrument cluster: speed, gear, battery and range, over Bluetooth.
iPhone · landscapeFree Glance face, Pro for more
Not affiliated with Tesla, Inc.
Principles
How MARVAR apps are built.
One job, done well.
Every MARVAR app is a focused utility. EVSim helps you test electric cars on your own drives. ClustR turns an iPhone into a driver display.
Privacy, in plain English.
Each app has its own privacy page. ClustR has no server of its own, so your driving data and VIN never go to the developer.
No account needed.
ClustR needs no ClustR account and no Tesla account. It pairs with your car over Bluetooth.
Honest about limits.
EVSim shows estimates, not guarantees. ClustR is a secondary display: your car’s own displays always come first.
About
Who makes MARVAR apps.
MARVAR is an independent iOS app brand run by Valentin Varadi, a private individual developer in Hungary, EU. It currently makes two iPhone apps: EVSim, free to download from the App Store, for testing electric cars on your own drives, and ClustR, coming soon, a live driver display for Tesla Model 3 and Model Y. ClustR is not affiliated with Tesla, Inc.
Questions? Email hello@marvar.eu or visit the support page.
Questions, feedback or a problem?
Help for both apps, and a way to reach us, lives on the support page.