Comparison

NVS Explorer vs Mopeka TankCheck

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NVS Explorer

Access real-time ocean data for the Pacific Northwest. Visualize conditions from various observing assets, view historical data plots, and share findings via email or SMS. Customize units and save favorite assets for quick access.

Highlights
  • View real-time ocean data
  • Access 24-hour, 7-day, and 30-day data plots
  • Share data plots via email or SMS
  • Searchable list of observing assets
  • Save favorite observing assets
  • Display data in scientific or common units
  • Data plots for tuna fishers
Features
Read full description

Welcome to the Northwest Association of Networked Ocean Observing Systems (NANOOS) Visualization System (NVS), your tool for easy access to data for Pacific Northwest waters, from California to British Columbia. NANOOS is a regional member of the U.S. Integrated Ocean Observing Systems (IOOS) program and is funded by the National Oceanic and Atmospheric Administration (NOAA) to provide this service. NVS displays data from a diversity of providers, including federal, tribal, state, academic, industry and non-profit organizations, who operate a wide variety of observing assets such as buoys, shore stations, sea-bed and coastal land-based stations. This composite view provides a more comprehensive view of ocean conditions. NVS allows you to browse through a map of all NANOOS observing assets. You can then look at the most current data available, or obtain a plot of the last 7 days. Plots can be saved to your phone or iPod. Plots can shared by either email or SMS. FEATURES: o View the most recent data from all NANOOS observing assets o View 24 hour, 7 day and 30 day plots of data for trends in conditions o Share plots via Email or SMS o Searchable List view of Observing Assets o Favorites o Data display in either Scientific or Common Units o Plots for Tuna Fishers

About

Mopeka TankCheck

This app works with a special sensor to measure the exact LPG propane level in your tank. Get real-time fill level and know precisely when you're running low. Ideal for RVs, heaters, and BBQ grills.

Highlights
  • Measures exact LPG propane fill level
  • Displays tank empty status
  • Works with RVs, heaters, and grills
  • Wireless sensor data transmission
  • Magnetic sensor attachment
Read full description

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 http://www.mopeka.com Usage: 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.

Screenshots

NVS Explorer4 screens
Mopeka TankCheck4 screens

Verdict

The call

The clearest difference is rating: NVS Explorer at 4.3 against Mopeka TankCheck's 2.9. NVS Explorer also leads on review sentiment (60% vs 24%). Mopeka TankCheck's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (58 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NVS Explorer holds the better App Store score, 4.3 against 2.9. That said, the two scores are not equally well evidenced: Mopeka TankCheck has 58 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 60% of NVS Explorer's written reviews are positive against 24% of Mopeka TankCheck's.

UpkeepUpdate frequency

NVS Explorer ships an update every 3 months, Mopeka TankCheck fortnightly. The most recent releases landed on June 11, 2026 and September 14, 2026 respectively.

Scorecard4 real differences · 6 level
NVS Explorer versus Mopeka TankCheck: the parameters behind the verdict, then further details
ParameterNVS ExplorerMopeka TankCheck
PriceFreeFree
Rating4.3 (3 ratings) — better2.9 (58 ratings)
Positive reviews60.0% of reviews — better24.1% of reviews
Number of ratings358 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size19 MB26 MB
Age rating4+4+
DeveloperNANOOS-IOOSASSOCIATIONMopeka Products, LLC

Customer experience

NVS Explorer

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews5 reviews
Positive60.0%
Neutral40.0%
Negative0.0%

Mopeka TankCheck

All ratings58 ratings
Positive37.9%
Neutral19.0%
Negative43.1%
Written reviews112 reviews
Positive24.1%
Neutral24.1%
Negative51.8%

In-app purchases

None

NVS Explorer

No in-app purchases

None

Mopeka TankCheck

No in-app purchases

Questions

Is NVS Explorer free?
NVS Explorer is free to download, with no in-app purchases.
Is Mopeka TankCheck free?
Mopeka TankCheck is free to download, with no in-app purchases.
Which has better reviews, NVS Explorer or Mopeka TankCheck?
NVS Explorer is rated higher. NVS Explorer averages 4.3 out of 5 from 3 ratings, while Mopeka TankCheck averages 2.9 from 58 ratings.
Do NVS Explorer or Mopeka TankCheck have ads?
Neither NVS Explorer nor Mopeka TankCheck shows ads.
Which is updated more often, NVS Explorer or Mopeka TankCheck?
NVS Explorer ships an update every 3 months, and Mopeka TankCheck fortnightly. Most recently, NVS Explorer was updated on June 11, 2026 and Mopeka TankCheck on September 14, 2026.

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