# Ruby Wireless Sensor vs Cylindex

The clearest difference is in-app purchases: Ruby Wireless Sensor at none against Cylindex's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Cylindex sells 1 in-app purchase, starting at $59.99 per year. Ruby Wireless Sensor asks for nothing beyond the download.

Ruby Wireless Sensor ships an update every 3 weeks, Cylindex every 6 weeks. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Ruby Wireless Sensor | Cylindex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ruby-wireless-sensor/id6473813823/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 76 MB | 85 MB |
| Requires iOS | 14.2 | **14.0.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Crystal Instruments Corporation](https://appshunter.io/developer/496441607) | [Cylinder Training Services, LLC](https://appshunter.io/developer/1794462402) |

## What reviewers say

### Ruby Wireless Sensor

[App page](https://appshunter.io/ios/app/ruby-wireless-sensor/id6473813823)

Connect to a compact wireless sensor to monitor mechanical structures. View real-time vibration data and manage the device via Bluetooth.

**Highlights:** Connect via Bluetooth, Manage wireless sensors, View real-time vibration data, Monitor mechanical structures, Ultracompact device integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Cylindex

[App page](https://appshunter.io/ios/app/cylindex-cylinder-inspections/id6741502559)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cylindex Premium | $59.99 | per year |


## Frequently asked questions

### Is Ruby Wireless Sensor free?

Ruby Wireless Sensor is free to download, with no in-app purchases.

### Is Cylindex free?

Cylindex is free to download, with in-app purchases available.

### Do Ruby Wireless Sensor or Cylindex have ads?

Neither Ruby Wireless Sensor nor Cylindex shows ads.

### Which is updated more often, Ruby Wireless Sensor or Cylindex?

Ruby Wireless Sensor ships an update every 3 weeks, and Cylindex every 6 weeks. Most recently, Ruby Wireless Sensor was updated on October 15, 2026 and Cylindex on October 9, 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.*