# SDT VR (Google Cardboard) vs Gyroscope ∞ Rotation Sensor

The clearest difference is in-app purchases: SDT VR (Google Cardboard) at none against Gyroscope ∞ Rotation Sensor's 2. SDT VR (Google Cardboard) also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Gyroscope ∞ Rotation Sensor sells 2 in-app purchases, starting at $1.99 per month. SDT VR (Google Cardboard) asks for nothing beyond the download.

SDT VR (Google Cardboard) ships an update every 3 weeks, Gyroscope ∞ Rotation Sensor every 4 weeks. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | SDT VR (Google Cardboard) | Gyroscope ∞ Rotation Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/gyroscope-rotation-sensor/id6774744125/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 248 MB | 16 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SDT International SA](https://appshunter.io/developer/1275552047) | [Fawkes Wei](https://appshunter.io/developer/432767536) |

## What reviewers say

### SDT VR (Google Cardboard)

[App page](https://appshunter.io/ios/app/sdt-vr-google-cardboard/id1414322113)

Explore the capabilities of the SDT340 Ultrasound Solution. This application demonstrates how to predict failures, manage energy expenses, and enhance product quality for improved asset uptime.

**Highlights:** Predict equipment failures, Control energy costs, Improve product quality, Enhance asset uptime, Demonstrates SDT340 Ultrasound Solution

**Features:** macOS Compatibility

**In-app purchases:** none


### Gyroscope ∞ Rotation Sensor

[App page](https://appshunter.io/ios/app/gyroscope-rotation-sensor/id6774744125)

Visualize your device's real-time rotation and angular velocity across three axes. Switch between degrees and radians per second for precise measurements. Offers a clean, distraction-free interface for understanding sensor data.

**Highlights:** Live 3-axis rotation chart, Degrees/second and radians/second modes, Smooth, bias-removed sensor readings, Distraction-free design, Real-time visualization

**Features:** iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is SDT VR (Google Cardboard) free?

SDT VR (Google Cardboard) is free to download, with no in-app purchases.

### Is Gyroscope ∞ Rotation Sensor free?

Gyroscope ∞ Rotation Sensor is free to download, with in-app purchases available.

### Do SDT VR (Google Cardboard) or Gyroscope ∞ Rotation Sensor have ads?

Gyroscope ∞ Rotation Sensor shows ads; SDT VR (Google Cardboard) does not.

### Which is updated more often, SDT VR (Google Cardboard) or Gyroscope ∞ Rotation Sensor?

SDT VR (Google Cardboard) ships an update every 3 weeks, and Gyroscope ∞ Rotation Sensor every 4 weeks. Most recently, SDT VR (Google Cardboard) was updated on November 2, 2026 and Gyroscope ∞ Rotation Sensor on November 8, 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.*