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 2.0.8

Added temperature compensated level measurements for supported sensors
Added registration prompt when sensor is seen for the first time on new phone
Lots of other small changes to tank sizes and other issues

Ratings and Reviews

3.1 out of 5

10 Ratings

10 Ratings

Might be good if it really worked


When I first installed the sensors and the app it told me what the level was in both tanks and I was hopeful. Then I left the RV for a bit and when I got back it wouldn't work again for about 6 weeks. Just kept saying something about turning on the Bluetooth which was on. I uninstalled and reinstalled the app, hit the green button various numbers of times, rebooted the phone and the BT, nothing worked. Then suddenly out of the blue it worked again! For a day. Then one of the sensors stopped reporting. It hasn't reported in over a week. The other one told me the tank was empty about a hundred times until I refilled it. The sensors and app are a good idea and would be helpful to full time RVers, just doesn't actually seem to work in real life.

Stop nagging me


This app is great, however it will just repeatedly alert you a tank is “low” over and over and over and over and over and over and over and over and over and over and over and over and over. Please don’t alert me if repeatedly because a tank is “low” when the level hasn’t even changed. I saw the previous 30 alerts. Please also add configurable time for automatic “refresh” in the background. I can’t imagine this thing randomly querying the sensors dozens of times a day is helping battery life.

Not a 100% Happy Camper

We rt II vb

I’ll have to agree with prior review that after several uses, the app now won’t connect to my iPhone 6s Bluetooth.!
However, the enclosed monitor does give adequate readings to this point.! I found the app monitor to be more enjoyable and accurate.!


Mopeka Products, LLC
3.9 MB
Requires iOS 8.0 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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