iPhone Screenshots


TezLab is a companion app for Electric Vehicles (EV). Track every trip you take in your car, compete against your friends on various metrics like distance traveled or efficiency. Control your car's climate, max charge level, and more within the app.

It's the app your EV deserves.

A qualified electric vehicle is required to use TezLab.

Terms of use: http://tezlab.happyfuncorp.com/terms
Privacy Policy: http://tezlab.happyfuncorp.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 3.1.0

New Track Tab - Recent and current trip(s), battery tab with charging history, battery reports.
New Trip View
Bug Fixes and Improvements.

Ratings and Reviews

3.1 out of 5
58 Ratings

58 Ratings

VAMountains ,

Wasted potential

I really enjoyed beta testing this app, but was profoundly disappointed when they finally published it on the store. There's just not enough value to this app to ask for a monthly subscription payment, and requiring users to log in via Twitter or Facebook is ridiculous given the nature of the app. Guys, at the end of the day this app divides your power usage by miles driven. Sure I can compare the totals to other people, but that's all it's doing. $5.99/month for that? I was really looking forward to using this, but I'm out.

Developer Response ,

TezLab is now free. Please give us another try.

RZABulldog ,

What a cool app for your Tesla!

Just heard about this app while listening to the Tesla Tidbits podcast and had to give it a shot since even Elon admitted this was a cool idea (to get badges for supercharger visits). I guess previously you had to pay for this app but now that it is free - why not give it a shot? My only suggestion is to perhaps modify your keywords so this app can be more easily found in the App Store. I wasn’t sure of the exact name so it took me some time to track it down, but glad I finally found it!

Chm888 ,

Login issues

I like the app, and all of the work you guys put into making it but... I just want the app to log information in the background and periodically check on it, but I have to put the credentials in too often which makes it not user friendly and reduces my usage of it and it’s usefulness.

Edit: bumping it up to 5 stars as their last update seems to have made it a lot better. Thanks for your hard work on this!

Developer Response ,

This has been vastly improved, please try the new update. Thanks for the feedback, we really appreciate it.


HappyFunCorp LLC
32.9 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad 2 Wi‑Fi + Cellular, iPad (3rd generation) Wi‑Fi + Cellular, iPad (4th generation) Wi‑Fi + Cellular, iPad mini Wi-Fi + Cellular, iPad Air Wi-Fi + Cellular, iPad mini 2 Wi-Fi + Cellular, iPad Air 2 Wi-Fi + Cellular, iPad mini 3 Wi-Fi + Cellular, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro Wi-Fi + Cellular, iPad Pro (9.7-inch) Wi‑Fi + Cellular, iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5-inch) Wi‑Fi + Cellular, iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch) Wi‑Fi + Cellular, iPad mini (5th generation) Wi-Fi + Cellular, and iPad Air (3rd generation) Wi-Fi + Cellular.



Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2019 HappyFunCorp, LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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