TezLab - For Tesla/Rivian 4+

Pioneering the EV Lifestyle

HappyFunCorp LLC

Designed for iPhone

    • 4.8 • 4.8K Ratings
    • Free
    • Offers In-App Purchases


TezLab is the most popular app for you and your vehicle. Get insightful drive details, track your drives, charges, and more. Share drives and charges and engage with your friends or other Tesla drivers around the world.

TezLab supports all Tesla and Rivian vehicles.

Terms of use: https://tezlabapp.com/terms
Privacy Policy: https://tezlabapp.com/privacy

Disclaimer: This software and documentation are not provided or endorsed by the makers of the electric vehicles. Use TezLab at your own risk. TezLab uses some of the same interfaces used by the official EV apps, however, those interfaces are undocumented and unsupported by the EV makers and HappyFunCorp cannot guarantee proper operation of TezLab. You are responsible for any changes to your car by using TezLab (car controls) as TezLab can unlock the car, and perform other functions on the car. HappyFunCorp is not liable for any damages to you, your car or any other object in conjunction with the use of this app.

What’s New

Version 2024.22.1

fixed a bug where stats weren't showing up for people on the home screen.

Ratings and Reviews

4.8 out of 5
4.8K Ratings

4.8K Ratings


Over a year with TezLab.

This platform has been an incredible source of data for myself as Drive over 70,000 miles a year in my Tesla. I’ve been able to log my actual battery health and capacity over long time scales and extreme use cases. It’s awesome to garner reliable data around actual range, real world efficiency and even the INCREDIBLE ability to plant trees to actively combat carbon production from charging the vehicle. There’s just so much good information and a fun way to get achievements and “mayorship” of charging stations. More than worth the price for the pro version and excited for future integration of different types of EVS like the Mach E and ID4. I really hope this happens.

TheBry ,

Nice App and Great Cause (carbon neutrality)

Really like what this app is trying to do, but only gave it four stars because I think it can be made “great” by making a few tweaks. Specifically, on long road trips, I’m awarded bronze, silver and gold badges for driving efficiently, keeping a consistent speed or fastest time covering a certain number of miles. I’d like the app to feature a trophy case (visible only by the user) to contain these achievements. As it is now, they get tossed into the ocean of other members’ achievements and aren’t readily accessible. Also, I’ve paid nearly $200 to purchase actual trees that will be planted to offset my carbon generated by charging, but that investment isn’t really celebrated as well as I think it should be inside the app. There should be a more thoughtful, graphically rewarding page I can refer to within the app that shows the region(s) of the world in which my trees are located, and when they were added.

Developer Response ,

Thanks for the feedback! We are working on both of the things you mention above for the future :)

Shon ,

Well designed app, but pro doesn’t offer the value

I love the aesthetics and the sheer amount of data. The remote controls and watch app work well and definitely a neat feature. Even the in-car dash during a drive is nice, and certainly super unique. All that said, I just don’t see the value in the subscription- for me personally. I don’t care all that much about the drive stats and data, which I’d say is this app’s primary feature. If you want to geek out about stats in real time and care about things like carbon impact, etc. then you might be happy. My favorite feature is the watch app. But even that I used maybe once just to try it. The in car dash is nice, but you have to have a web browser open- good workaround but just not quick or practical. All that said, again, this is a very aesthetically pleasing app that clearly is a labor of love. I’d recommend it, even though it’s not for me.

Developer Response ,

Thanks for your thoughtful review and feedback!

We have a lot more planned for our Pro members over the next few quarters that will continue to add more utility beyond stats as you're absolutely right - everybody finds value in different features. Please don't hesitate to reach us at any point at support@tezlabapp.com if there's anything we can assist with now or in the future!

App Privacy

The developer, HappyFunCorp LLC, 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 Linked to You

The following data may be collected and linked to your identity:

  • Financial Info
  • Contact Info
  • Identifiers
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


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