# RDS vs Sensor Technology Engineering

The clearest difference is update cadence: RDS at every 3 months against Sensor Technology Engineering's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

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

RDS ships an update every 3 months, Sensor Technology Engineering every 7 months. The most recent releases landed on June 5, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | RDS | Sensor Technology Engineering |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rds-32/id1623034787/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free | — |
| Size | 49 MB | 94 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mirion Technologies, Inc.](https://appshunter.io/developer/561534087) | [Sensor Technology Engineering](https://appshunter.io/developer/1668239053) |

## What reviewers say

### RDS

[App page](https://appshunter.io/ios/app/rds-32/id1623034787)

This utility app connects to a radiation survey meter, displaying real-time data and allowing parameter adjustments. It also integrates with supervision services for enhanced monitoring.

**Highlights:** Connect to RDS-32 survey meter, Display real-time device data, Edit setpoints and parameters, Connect to RadResponder, Connect to Spirview Mobile

**Features:** macOS Compatibility

**In-app purchases:** none


### Sensor Technology Engineering

[App page](https://appshunter.io/ios/app/sensor-technology-engineering/id1627959712)

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

**In-app purchases:** none


## Frequently asked questions

### Is RDS free?

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

### Is Sensor Technology Engineering free?

Sensor Technology Engineering is free to download, with no in-app purchases.

### Do RDS or Sensor Technology Engineering have ads?

Neither RDS nor Sensor Technology Engineering shows ads.

### Which is updated more often, RDS or Sensor Technology Engineering?

RDS ships an update every 3 months, and Sensor Technology Engineering every 7 months. Most recently, RDS was updated on June 5, 2026 and Sensor Technology Engineering on September 15, 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.*