By HappyFunCorp LLC

  • Category: Travel
  • Release Date: 2017-06-03
  • Current Version: 2020.14
  • Adult Rating: 4+
  • File Size: 34.59 MB
  • Developer: HappyFunCorp LLC
  • Compatibility: iOS 8.0+
Score: 3.77
From 22 Ratings


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: 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.


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Nice app, but overpriced

$30 annually is a bit overpriced considering what the app offers.
By Jase1125

Can’t go pro with performance issues on app

I’ve been using TezLab since 2018. Now performance on the app was always an issue. But with all the pro features offered, I was up and joy for it. But you can’t expect people to stick around with these same performance issue you had for two years. Address your app issue or I’m fine using Teslafi and others resources.

Want to love this app but I just can’t

Well, lowering from 2 stars to 1. After waiting forever for PRO to roll up, the rollout was all botched. I was hoping the data in the app would be more accurate now, as well, but it’s not. I routinely drive to from a long hill up to our city. It’s 500+ ft. Tezlab constantly shows the elevation as some random number. today. my elevation gain was -33 ft. Every once in a while it gets it right or at least close but i’d say that’s the exception not the rule. If the app doesn’t get the easy stuff right, I don’t trust the more difficult stuff to be accurate. The new graphs are a nice improvement but they have issues as well and honestly should have been there all along. The battery graph doesn’t seem to work. It says you need at least one 90% charge in the last 7 days but I have that and, nothing. The “range added vs range use” is potentially very useful but like most things in this app, it falls short of it’s promise. Most annoying, is it doesn’t remember your setting for the drop down so EVERY time you go to the graph, you have to change it back to what you want. Also, it has phantom drain but nothing allows you to filter to just phantom drain, or even click on the bars to see a break down of the values. So you can’t get any real numbers from the chart. So yes, better but not great. So maybe I can use the new export functionality to get the numbers. Nope. Click on export and I just get a blank pop up that says “Export”. The app also still does not allow you to customize your sleep settings. If you do 4 drives in one day separated by an hour+ each, our car will be awake 4 hours longer than if you weren’t using the app because the app waits an hour before allowing it to sleep try to sleep. That is unacceptable. Tezlab REALLY needs a usability expert to help with the app design and QA to do better QA. {sigh}. So close, yet so far away.
By Climbbike

App suggestions.

Can you add a feature for the battery view showing how many charge cycles the battery has gone through? Can you also report on the total KWH charged using AC vs super charging? Can you also pull the current battery capacity vs factory capacity?
By fdgbr

Worked Nicely, Now Won’t Log Into Tesla

This was a nice app. Now when it asks for the Tesla credentials, it says they’re invalid. I can still log in and out of the true Tesla app so something is amiss in this app
By RDibbxsh

Great app must have

Just picked up the 2020 M3P Self driving and Just trust me if you don’t have this app get it now you won’t regret it. The social aspect is interesting as well. It allows you to see and compare your efficiency, distance, charging with others. So for me I wanted to make sure getting and average 60 % efficiency wasn’t only me and I was right. Lol. Your welcome.
By repete26


Version 3.1.5 (676) has been broken on iPhone X for a while. Middle tab results in crash and full blank screen.
By Allen87

Nice but missing key info

Downloaded it for a couple of days. I looked everywhere to see if there is battery health data but cannot find it. As far as I am concern all EV owner wants battery health, SoC, battery temperature, charge balance, battery capacity vs rated capacity etc. Maybe next version.
By Velo nino


If you have a Tesla you owe it to yourself to get this app. Extremely informative and extremely well put together. Love it!
By Acohen007

Awesome companion for Tesla

I’ve been using TezLab for years and it keeps getting better and better. Great car controls, trip tracking and all sorts of metrics are readily available. The social aspect (optional) is great for comparing with friends and the larger community. The new supercharger reports are also a great addition. Fantastic design, great features and it’s FREE.
By The Mace


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