Dr. Prius / Dr. Hybrid is an app developed to help professional Toyota/Lexus hybrid repair shop or owners to examine the health of the High Voltage battery. It turns your mobile device into a professional diagnostic equipment that usually cost thousand of dollars, it is being trusted by 31+ professional repair shops around the world.
Dr. Prius perform test and provides access to all the relevant battery information to quickly help identify problems with a simple touch on the screen of a smartphone, do not fall victim to bad battery, test the battery and print the certificate to prove the health of the battery system.
Note: This app requires a Bluetooth OBD interface to communicate with your hybrid vehicle, please see What OBD2 to buy page for more detail
Thank you for the support and please send us feedback at feedback@PriusApp.com
©2019 Big Wheel Tech. All Rights Reserved
Battery Monitor page
Battery Full Test page
Battery Expectancy test page
Speical Feature page
Nearby Hybrid Repair Shop
©2019 Big Wheel Tech. All Rights Reserved
1. Which bluetooth OBD2 adapter should I buy?
Please refer to the What OBD2 to buy page.
2. Can Dr. Prius run on my phone/tablet?
Dr. Prius is available on Android, iOS and Amazon platforms, however some cheap Android devices may have a low quality Bluetooth interface that cause random disconnection, it will generate frustration while a long test got interrupted.
2. Why is bluetooth OBD2 adapter better than WiFi OBD2 adapter?
WiFi OBD2 adapter has to go through extra steps in order to be connected, also it often interrupt internet conneciton and yield very bad user experience.
3. Why is Dr. Prius trys to reconnect multiple times during test?
That usually means you have too many Apps running in the background fighting resource with the bluetooth or WiFi connection. Or it could be other nearby Bluetooth device(s) trying to hijack/interference the wireless connection.
4. How do I know if my bluetooth OBD2 adapter would work?
Simply connect the adapter to your car, pair it with your device and then run Dr. Prius, Dr. Prius will attempt to connect to your OBD2 3 times, if for some reasons fail, Dr. Prius will show you exactly what went wrong during the process.
5. Will performing the Life Expectancy test hurt my car?
Don't worry, Prius is drive by wire, means even if you pedeal to the metal the car is not actually spinning the wheel and doing burn out, it simply charging up the battery using the energy from the engine.
6. The engine kick-in during the last step of life expectancy test, will that affect the result of the test?
The latest code has taken "engine kick-in" into consideration therefore the result will most likely intact.
7. Where is the monitor page recording goes to?
The monitor log is storing in the "BatteryTestHistory" folder at the root of your device, or simply search for BatteryMonitorLog.csv when connecting your device to a computer.
8. What is the green, orange and red signify on the voltage blocks means?
Each battery blade has a safe voltage range from 6-9 volts, outside that range will cause tiny degradation to the battery chemistry, orange and red color is therefore used to indicate that voltage is outside the absolute safe zone.
9. What is the "Override battery temperature" for in special feature page?
If noise level is not a problem, you can keep the battery running cooler during those hot summer days and prolong the battery life dramatically, heat is the number one enemy of battery!
10. Why do you came up with Dr. Prius App?
With thousands of Prius out of warranty everyday, average consumer need an easy way to access the battery information, we believe that most of the general battery information should be free to the public and customers could choose to pay for more advanced test features to inspect the battery health further.
11. What hybrid vehicles are you supporting and will be supporting?
We currently support Prius Gen2, Gen3, Prius C, Auris and all Lexus Hybrid
Feel free to send us request if you wish to have your Toyota hybrid supported in Dr. Prius app.
Please send your feature request to feedback@PriusApp.com
Nothing can be worst waking up in the morning seeing one-start review from user claiming my App isn't working. Luckily friends and loyal users help me identify that 90% of the problem is causing by bad clone out there flooding the market, those bad clone lure users with unbelievable low price but the result never end well... at least for Dr. Prius App or other hybrid specific Apps like Hybrid Assistant.
It's a misconception that whatever work for Torque App should also work for Dr. Prius, the reality is, to get to the battery specific information, the OBD2 adapter must have the ability to "set message header" to a different ECU address, while other generic Apps only targeting the main ECU to retrieve very basic vehicle information like speed, rpm, coolant temperature.. etc. And with that, I decided to buy all the cheap clone adapters and see for myself, you my friend, just sit tight and enjoy the show.
PS: Most of the adapters are for Android only, iOS user please jump to the bottom of the page.
1. ELM327 Identifier
2. Elm327 OBD Terminal
3. Dr. Prius App
4. Hybrid Assistant App
5. Torque App
This expensive adapter claim to support bluetooth 4.0 and all OBD protocols.
Yeah right! this is another junk adapter that is being packaged in a tiny and beautiful space-grey semi-transparent case, however it is far from usable and it does not have the ability to switch between ECUs, I've tried it on both iOS and Android devices with the same disappointed result. The only App that works for this adapter is called "Mini OBD II" App, it is nothing more than a proxy to the basic vehicle information.
This no name Junk is sharing the same packaging as the previous Mini Junk.
It has a nice transparent blue finished, and it "looks like" it is able to switch between ECUs, however at the end it failed to retrieve battery related information from both Prius Gen2 and Gen3. Please browse away whenever you see this packaging, I believe they are from the same company that produce defected/un-tested products.
This particular cheap clone has dominated the market for many years and it's absolutely disgusting, there is a real ELM327 version out there but with more expensive price tag
Definitely one of the worst adapter, it doesn't even support most of the basic OBD command from v1.2 all the way to v2.3, it might work with a few simple OBD app but definitely not for Dr. Prius.
This is a weird adapter that kind of work
This adapter with On/Off switch has a tendency of losting connection, on top of that it is missing info in every response (missing number of additional bytes at the beginning of each payload), however I did able to make it to work for Dr. Prius, still, not recommend.
This adapter come with nice acrylic case and instruction, it "almost" pass the test...
My first impression with this adapter is pretty good, feels like this manufacturer/distributor spent time in branding and packaging, it works for most of the part but unfortunately it has this weird bug that preventing a few data being retrieved consistently
Note: This adapter can work with Dr. Prius but missing DTC error code data, people actually give me one-star for this reason..
You will find these package on internet everywhere, however only a handfull of sellers actually selling the good stuff,
make sure you see double layer PCB from the product pictures
Update 07/11/2018 - After couple of one-star user reviews, I found that even a dual-layer PCB could be a bad clone, at this time I don't want to approve any OBD2 adatper in this form factor, it feels like someone from the China factory is watching this post and changing their strategy to counter back, not cool, not recommend and buy at your own risk!
Update 06/09/2018 - thanks to our friend Alexandr from Belarus, we actually found a good clone on AliExpress that is cheap and works well (as of 6/8/2018), be sure to pick the BLUE or WHITE adapter NOT the black with MINI on it. Please be aware that this seller recently swap the black adapter with a bad clone that doesn't work at all, NOT COOL!
AliExpress OBD2 adapter for Android
Finally!! An adapter that you can trust!
I got this PanLong OBD2 adapter from Amazon thinking I could return it anytime, and surprisingly that never happened for the past two years. This adapter is the work horse of all my developing and testing effort.
Open up the case and see for yourself how beefy it is compare to any other clone mini.
Affordable and reliable solution in one compcat package, I am loving it!
Don from Carista sent me this OBD2 adapter to test, and I fall in love immediately with how compact this adatper is! Most of the other adapters have such a big head that often jam on the Prius kick panel (you should understand if you've ever tried it), but this Carista fits right in smoothly.
What also make it stands out is the price, for less than 20 bucks it is one of the best value adapter out there that support both iOS and Android !
Another bonus is it comes with it's own App that support not only the Toyota hybrid, I think it's subscription based service that allow you to unlock factory settings from car manufactures, https://blog.caristaapp.com/
Amazon US: Carista OBD2 Bluetooth Adapter for iOS and Android
Another taking my chance for the sake of science, I bought them all and test them out...
Let's start with their Bluetooth for Android, it's basically the same as PanLong or any other beefy clone adapters selling at a great price, great deal!
What really impress me is their Bluetooth BLE 4 adapter that out perform any other cheap clone that I've owned, it is such a speedster retreiving data from OBD port like other more expensive adapters, I also like it's untraditional shape make it stands out
Their WiFi adapter is also good but I ran into usability issues like the design of the power button confsued me and the blue/red indication light isn't bright enough to see even at night, but overall a good WiFi adapter
Amazon US: VEEPEAK OBD2 Bluetooth 4.0 for iOS and Android
Amazon US: VEEPEAK OBD2 Bluetooth for Android
This affordable adapter that support both Android and iOS (BLE 4)
Update 02/09/2019 I have user report back saying TONWON adapter from Amazon has bad quality control, he got two bad adapters in a row, thanks Clarence for the warning!
I found this "TONWON" adapter from Amazon, I also found it being rename to "OBDII Pro" or "VGate" on AliExpress, and as a matter of fact I don't actually know which one is the original...
It is one of the best adapters I've tested so far, it connect to both my Android and iOS beautifully, Note: Pick the one with "BLE 4.0 With iOS and Android", NOT the 3.0 or WiFi
Amazon US: TONWON OBD2 Bluetooth 4.0 for iOS and Android
AliExpress (International): vGate OBD2 Bluetooth 4.0 for iOS and Android
WARNING !! NOT ALL vGate are created equally, there are older version vGate(Bluetooth 3.0) or fake vGate flooded the market, please pick the one that looks exactly like the one in below picture, the side has clear writing "Bluetooth LE 4.0 E50".
Following are several top-rated OBD2 adapters that approved by many Dr. Prius users, you could find these adapters easily, not limited to Amazon
OBDLink LX Bluetooth
Amazon US: https://www.amazon.com/gp/product/B00H9S71LW/
BAFX 34t5 Bluetooth
Please also visit my friend at Hybrid Assitant for more helpful information: