Comparison

Vernier Graphical Analysis GW vs TestNav

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

Head to head
About

Vernier Graphical Analysis GW

This application allows science students to collect, graph, and analyze data from various sensors. It supports multiple data-collection modes, offers advanced analysis tools, and enables data sharing for lab reports and further spreadsheet analysis.

Highlights
  • Multi-sensor data collection
  • Time, event, and drop counting modes
  • Graphing and table view
  • Data analysis and statistics
  • Curve fitting
  • Data export (.CSV)
  • Manual data entry
Features
Read full description

Graphical Analysis™ GW is a tool for science students to collect, graph, and analyze data from Vernier Go Wireless® sensors. Sensor data-collection support: • Vernier Go Wireless® Temp and Go Wireless pH sensors • Vernier Go Wireless Heart Rate and Go Wireless Exercise Heart Rate monitors • Vernier LabQuest® sensors used with Go Wireless Link or LabQuest Stream interfaces • Basic support for some Vernier Go Direct® Sensors • NODE (by Variable Inc.) sensor support Additional experiment options: • Data Sharing via Wi-Fi connection to LabQuest 2 or Logger Pro® 3 • Built-in Sensors (accelerometers) • Manual Entry Note: Sensor data collection and Data Sharing require the purchase of hardware from Vernier Software & Technology. Built-in sensor and manual entry of data can be performed without a hardware purchase. For more information on Data Sharing, visit http://www.vernier.com/css Key Features - Data Collection • Multi-sensor data-collection support • Time Based, Event Based, and Drop Counting data-collection modes • Configurable data-collection rate and duration for time-based data collection • Sensor calibrations • Option to zero and reverse sensor readings • Graph match feature for use with motion detectors • Manual entry of data from keyboard and clipboard Key Features - Data Analysis • Display one, two, or three graphs simultaneously • View data in a table or show a graph and table side-by-side • Draw Predictions on a graph to uncover misconceptions • Examine, interpolate/extrapolate, and select data • Apply Statistics calculations to find mean, min, max, and standard deviation • Perform curve fits, including linear, quadratic, natural exponent, and more • Add calculated columns based on existing data to linearize data or investigate related concepts • Pinch to scale graphs Key Features - Collaboration and Sharing • Add graph titles • Export graphs and data for printing and inclusion in lab reports • Export data in .CSV format for analysis of data in spreadsheet software such as Excel®, Google Sheets™, and Numbers® Vernier Software & Technology has over 35 years of experience in providing effective learning resources for understanding experimental data in science and math classrooms. Graphical Analysis GW is a part of the extensive system of sensors, interfaces, and data-collection software from Vernier for science and STEM education.

About

TestNav

This application provides a secure and reliable platform for delivering educational tests online. It ensures test items are presented consistently across devices.

Highlights
  • Secure test delivery
  • Reliable online platform
  • Consistent test item presentation
  • iOS device compatibility
Read full description

TestNav is Pearson's online test delivery platform. It enables test items to be delivered online securely and reliably in a consistent manner. The TestNav for iOS app allows TestNav to run on iOS devices.

Screenshots

Vernier Graphical Analysis GW4 screens

Verdict

The call

The clearest difference is rating: Vernier Graphical Analysis GW at 2.4 against TestNav's 1.6. Vernier Graphical Analysis GW also leads on update cadence (every 3 months vs every 8 months) and device support (3 vs 1). TestNav's advantage is monetization model (free vs free with in-app purchases). On price, review sentiment, ratings volume and ads 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

Vernier Graphical Analysis GW holds the better App Store score, 2.4 against 1.6. Both are backed by a comparable volume of ratings — 158 and 104 respectively. Written reviews point the same way: 27% of Vernier Graphical Analysis GW's written reviews are positive against 24% of TestNav's.

UpkeepUpdate frequency

Vernier Graphical Analysis GW ships an update every 3 months, TestNav every 8 months. Both last shipped on November 1, 2026.

Scorecard5 real differences · 5 level
Vernier Graphical Analysis GW versus TestNav: the parameters behind the verdict, then further details
ParameterVernier Graphical Analysis GWTestNav
PriceFreeFree
Rating2.4 (158 ratings) — better1.6 (104 ratings)
Positive reviews26.7% of reviews — better23.6% of reviews
Number of ratings158 — better104
Update frequencyEvery 3 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS11.0 — better13.0
Further details — not scored
Size20 MB2 MB
Age rating4+4+
DeveloperVernier Software & TechnologyPearson

Customer experience

Vernier Graphical Analysis GW

All ratings158 ratings
Positive34.2%
Neutral3.2%
Negative62.7%
Written reviews90 reviews
Positive26.7%
Neutral12.2%
Negative61.1%

TestNav

All ratings92 ratings
Positive15.2%
Neutral2.2%
Negative82.6%
Written reviews89 reviews
Positive23.6%
Neutral3.4%
Negative73.0%

Bugs and requests

Vernier Graphical Analysis GW

Not enough reviews yet to summarise bugs or requests.

TestNav

Reported bugs

6 issues
  • Open response boxes never work properly
  • Drag and drop not working
  • Permission errors for speech, mic, etc.
  • App crashes all the time
  • App doesn't work
Show 1 more
  • App needs update but cannot update

Requested features

10 requests
  • Way to lower brightness
  • Actual Dark Mode
  • Allow access to Accessibility Shortcuts menu during testing
  • Enable/disable inverted colors during testing
  • Enable zoom during testing
Show 5 more
  • Enable VoiceOver during testing
  • Add dancing GIFs of Nick Young
  • Add mini games with golf balls and levels
  • Add Flappy golf extreme
  • Add cross map tomahawks

In-app purchases

None

Vernier Graphical Analysis GW

No in-app purchases

None

TestNav

No in-app purchases

Questions

Is Vernier Graphical Analysis GW free?
Vernier Graphical Analysis GW is free to download, with no in-app purchases.
Is TestNav free?
TestNav is free to download, with no in-app purchases.
Which has better reviews, Vernier Graphical Analysis GW or TestNav?
Vernier Graphical Analysis GW is rated higher. Vernier Graphical Analysis GW averages 2.4 out of 5 from 158 ratings, while TestNav averages 1.6 from 104 ratings.
Do Vernier Graphical Analysis GW or TestNav have ads?
Neither Vernier Graphical Analysis GW nor TestNav shows ads.
Which is updated more often, Vernier Graphical Analysis GW or TestNav?
Vernier Graphical Analysis GW ships an update every 3 months, and TestNav every 8 months. Most recently, Vernier Graphical Analysis GW was updated on November 1, 2026 and TestNav on November 1, 2026.

Other comparisons