# NVS Explorer vs Mopeka TankCheck

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.

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

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.

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.

## The numbers

| Metric | NVS Explorer | Mopeka TankCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/nvs-explorer/id373563865/reviews)** | [2.9 (58 ratings)](https://appshunter.io/ios/app/mopeka-tankcheck/id981959807/reviews) |
| Number of ratings | 3 | **58** |
| Positive reviews | **60.0% of reviews** | 24.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 19 MB | 26 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NANOOS-IOOSASSOCIATION](https://appshunter.io/developer/1792959921) | [Mopeka Products, LLC](https://appshunter.io/developer/981959806) |

## What reviewers say

### NVS Explorer

[App page](https://appshunter.io/ios/app/nvs-explorer/id373563865)

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:** macOS Compatibility

**In-app purchases:** none


### Mopeka TankCheck

[App page](https://appshunter.io/ios/app/mopeka-tankcheck/id981959807)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*