Comparison

NVS Explorer vs Epoch Li

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

Epoch Li

Monitor your lithium-ion battery system in real-time via Bluetooth. View voltage, current, power, and internal resistance. Receive alerts for temperature, short circuits, and voltage deviations to extend battery life and enhance stability.

Highlights
  • Real-time voltage, current, power, and internal resistance display
  • Individual battery voltage and alarm status monitoring
  • Cell comparison and balancing display
  • Temperature and critical parameter warnings
  • Record of all warnings and protection events
Features
Read full description

Make sure you have the latest app version. Turn on your Bluetooth. Tap the icon to open the App. It will search for all Epoch batteries within the range of your Bluetooth device and provide a list. If all the batteries are not listed, move closer to the battery location and refresh the screen. Choose the battery you want to look at. The Epoch intelligent battery management system and the active equalizer are connected via Bluetooth to monitor the battery status, collect, store and process information during battery operation in real time, exchange information with external devices, and solve the safety, usability and usage of the lithium battery system The key issue of life is to extend the service life of the battery to a certain extent, and to enhance the stability of the battery pack to a certain extent. 1. Display real-time voltage, current, power, internal resistance and other parameter values, and display them in the form of instrument panels and numbers; 2. Display the real-time voltage and alarm status of all single batteries. If the reported parameters trigger the alarm value or protection value, an alarm will be prompted; 3. Each data comparison of the battery cell, the voltage difference. Maximum voltage cell Minimum voltage cell. And the display of cell balance 4. Cell temperature warning. Real-time alarm for over temperature, short circuit, over voltage, under voltage 5. Record the warnings that occur at each moment. 6. Record all battery protection times. Best Regards !

Screenshots

NVS Explorer4 screens
Epoch Li4 screens

Verdict

The call

The clearest difference is rating: NVS Explorer at 4.3 against Epoch Li's 2.6. NVS Explorer also leads on review sentiment (60% vs 29%). Epoch Li's advantage is update cadence (every 3 weeks vs every 3 months) and ratings volume (70 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 2.6. That said, the two scores are not equally well evidenced: Epoch Li has 70 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 29% of Epoch Li's.

UpkeepUpdate frequency

NVS Explorer ships an update every 3 months, Epoch Li every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
NVS Explorer versus Epoch Li: the parameters behind the verdict, then further details
ParameterNVS ExplorerEpoch Li
PriceFreeFree
Rating4.3 (3 ratings) — better2.6 (70 ratings)
Positive reviews60.0% of reviews — better29.2% of reviews
Number of ratings370 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size19 MB35 MB
Age rating4+17+
DeveloperNANOOS-IOOSASSOCIATIONEDG Sales International LLC

Customer experience

NVS Explorer

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

Epoch Li

All ratings70 ratings
Positive35.7%
Neutral5.7%
Negative58.6%
Written reviews48 reviews
Positive29.2%
Neutral10.4%
Negative60.4%

Bugs and requests

NVS Explorer

Not enough reviews yet to summarise bugs or requests.

Epoch Li

Reported bugs

14 issues
  • Bluetooth does not auto-connect
  • Bluetooth signal frequently drops
  • App crashes frequently
  • App disconnects when minimized or switching apps
  • App does not remember previously connected devices
Show 9 more
  • App shows incorrect battery charge levels
  • App history tab is useless
  • App is not documented, data is unclear
  • App shows 0% or no data after recent updates
  • App does not always reflect true battery charge
  • App cannot see information from multiple batteries in series
  • App has backward animations and sloppy UI
  • App requires password for advanced settings without providing it
  • App disconnects and will not re-connect until app is killed and reopened

Requested features

10 requests
  • Filter Bluetooth devices by MAC address prefix
  • Implement BLE non-exclusive connection
  • Bring back old app features (time to charge/discharge)
  • Document app data and features
  • Provide password for advanced settings
Show 5 more
  • Allow saving of battery connections/names
  • Release old app as a separate option
  • Improve Bluetooth connection stability and range
  • Fix incorrect battery charge readings
  • Display data for multiple batteries in series correctly

In-app purchases

None

NVS Explorer

No in-app purchases

None

Epoch Li

No in-app purchases

Questions

Is NVS Explorer free?
NVS Explorer is free to download, with no in-app purchases.
Is Epoch Li free?
Epoch Li is free to download, with no in-app purchases.
Which has better reviews, NVS Explorer or Epoch Li?
NVS Explorer is rated higher. NVS Explorer averages 4.3 out of 5 from 3 ratings, while Epoch Li averages 2.6 from 70 ratings.
Do NVS Explorer or Epoch Li have ads?
Neither NVS Explorer nor Epoch Li shows ads.
Which is updated more often, NVS Explorer or Epoch Li?
NVS Explorer ships an update every 3 months, and Epoch Li every 3 weeks. Most recently, NVS Explorer was updated on October 23, 2026 and Epoch Li on October 24, 2026.

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