# Vernier Graphical Analysis vs StellarRAD

The clearest difference is rating: StellarRAD at 3.6 against Vernier Graphical Analysis's 2.1. StellarRAD also leads on update cadence (every 3 days vs every 2 months). Vernier Graphical Analysis's advantage is ratings volume (527 vs 10). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

StellarRAD holds the better App Store score, 3.6 against 2.1. That said, the two scores are not equally well evidenced: Vernier Graphical Analysis has 527 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 32% of Vernier Graphical Analysis's written reviews are positive against 33% of StellarRAD's.

Vernier Graphical Analysis ships an update every 2 months, StellarRAD every 3 days. The most recent releases landed on October 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Vernier Graphical Analysis | StellarRAD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (527 ratings)](https://appshunter.io/ios/app/vernier-graphical-analysis/id1385963326/reviews) | **[3.6 (10 ratings)](https://appshunter.io/ios/app/stellarrad/id1544319555/reviews)** |
| Number of ratings | **527** | 10 |
| Positive reviews | 32.2% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 106 MB | 80 MB |
| Requires iOS | 17.7 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Vernier Software & Technology](https://appshunter.io/developer/389784250) | [Stellarnet Inc](https://appshunter.io/developer/1544319557) |

## What reviewers say

### Vernier Graphical Analysis

[App page](https://appshunter.io/ios/app/vernier-graphical-analysis/id1385963326)

This app allows science students to collect, graph, and analyze data from Vernier sensors. It supports various sensor types, offers multiple data collection modes, and provides powerful analysis tools like curve fitting and statistics. Data can be shared and exported for reports and further analysis.

**Highlights:** Multi-sensor data collection, Various data collection modes, Simultaneous graph display, Data table view, Curve fitting, Statistical calculations, Data export (.CSV)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Helpful for physics/chemistry labs
- 👍 Easy to use interface
- 💡 Useful data analysis features

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔋 Drains battery quickly
- 🤯 Bizarre and unexplained glitches
- 🤢 Caused health issues for some users

**Reported bugs**

- App freezes and becomes unresponsive
- Sensor data not accurately recorded
- Unexpected app behavior and strange visual effects

**Requested features**

- More stable and reliable performance
- Better compatibility with older devices
- Improved Bluetooth connectivity


### StellarRAD

[App page](https://appshunter.io/ios/app/stellarrad/id1544319555)

This app enables real-time light spectrum analysis using WiFi-enabled spectrometers. It allows users to capture and analyze various light parameters, including spectral irradiance, lumens, and colorimetric data like CRI and CCT. Data can be easily saved and exported in multiple formats.

**Highlights:** Real-time light measurement, Full spectrum analysis, Control spectrometer, Spectral irradiance and lumens, Colorimetric analysis (CRI, CCT, xy), Save and export data (.IRR, screenshot, PDF)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Vernier Graphical Analysis free?

Vernier Graphical Analysis is free to download, with no in-app purchases.

### Is StellarRAD free?

StellarRAD is free to download, with no in-app purchases.

### Which has better reviews, Vernier Graphical Analysis or StellarRAD?

StellarRAD is rated higher. Vernier Graphical Analysis averages 2.1 out of 5 from 527 ratings, while StellarRAD averages 3.6 from 10 ratings.

### Do Vernier Graphical Analysis or StellarRAD have ads?

Neither Vernier Graphical Analysis nor StellarRAD shows ads.

### Which is updated more often, Vernier Graphical Analysis or StellarRAD?

Vernier Graphical Analysis ships an update every 2 months, and StellarRAD every 3 days. Most recently, Vernier Graphical Analysis was updated on October 18, 2026 and StellarRAD on September 13, 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.*