This application is designed to be used with the Mopeka TankCheck sensor. The Tank Check application can measure the LPG propane level to tell you the exact fill level and when your tank is empty. It can be used on tanks found in RVs, heaters, BBQ grills, etc. The Tank Check sensors are magnetically stuck to the bottom of your propane tank and will periodically measure and wirelessly send the fill level or percentage to the Tank Check app. Stick it on the bottom of your tank and know exactly when you are running low on propane! This technology is patent pending.

More info about the TankCheck Sensor and links to purchase the sensors can be found on the Mopeka website at

1. To pair your Tank Check sensor to the phone, simply press the "Sync" button on the back of the sensor while the app's main screen is visible. The first time you use your Tank Check sensor you must press the "Sync" button 5 times in a row in order to wake up the sensor.
2. Place the Tank Check sensor in the center of the underside of the tank. Most tanks have a small "flat" spot on the center and this is the nominal location for the sensor.
3. Flip the tank over. Once the fluid has settled the app will display a reading. Note that the LPG fluid will be sloshing around in the tank for a few minutes and the quality of the measurements will be low until this has stabilized.

What’s New

Version 2.1.40

Improved XL sensor performance

Ratings and Reviews

3.7 out of 5
3 Ratings

3 Ratings

Anev942 ,

No joy on iPad

Installed on iPad 9.3.5, all I get is "Star Scan Error" please check that Bluetooth is enabled and try again.
It is and connects/pairs with other devices? I've tried turning on/off Bluetooth, other connections, reinstalling app and other solves I could find to no avail. Any suggestions?

Should note I have installed app on another iPad (12.1.4), 2 phones and app is awesome, just wish I could get on my iPad...

Eddiemac1964 ,

Works as advertised...

We are full time RVrs and live in a colder climate. I bought the sensors to give us notice of our propane levels in colder weather. One thing that I noticed is that the tank surface must be clean and relatively smooth for the device to work. Also, if a sensor starts getting "wonky", you can pull the battery to reset the sensor to factory specs. The sensors themselves are fairly accurate and reliable; if one of them says that a tank is low I know it's time to go out and check the regulator to see if it has switched over. As far as the App, I'd like to see notifications for low signal, low battery, and low propane levels. This would make it so I wouldn't have to manually check the app periodically.

Update: the developers recently added the notifications I requested. Also they updated the overall appearance of the app. The changes to the app seem to work great and will certainly make things easier. I really appreciate the responsiveness of the development team in adding this to the app. I honestly can't think of any reason why anyone who wants a reliable propane tank level solution wouldn't want this app and the devices they support.

Developer Response ,

Please check-out the new version. We have added adjustable notifications for low propane levels.

SybilAtl ,

Works great

I’ve been using this for several months now and it works great. When the temps were well below freezing it gave me either empty or completely full readings even though it was about half full. But I was able to check the level just fine when it warmed up a little. I’m very happy with the sensor, and have found it to be pretty accurate otherwise. I’ve not had any problems with the app and my iPhone.


Mopeka Products, LLC
4.8 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Mopeka Products, LLC


  • Family Sharing

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

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