# Solinst vs RSTAR Affinity Field Utility

The clearest difference is rating: RSTAR Affinity Field Utility at 3.5 against Solinst's 1.0. RSTAR Affinity Field Utility also leads on update cadence (every 6 weeks vs every 5 months). Solinst's advantage is ratings volume (7 vs 2) and iOS requirement (16.2 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

RSTAR Affinity Field Utility holds the better App Store score, 3.5 against 1.0. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

Solinst ships an update every 5 months, RSTAR Affinity Field Utility every 6 weeks. The most recent releases landed on September 5, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | Solinst | RSTAR Affinity Field Utility |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (7 ratings)](https://appshunter.io/ios/app/solinst/id854408232/reviews) | **[3.5 (2 ratings)](https://appshunter.io/ios/app/rstar-affinity-field-utility/id1613603019/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 84 MB |
| Requires iOS | **16.2** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Solinst Canada Ltd.](https://appshunter.io/developer/854408235) | [R.S.T. Instruments Ltd](https://appshunter.io/developer/1613603021) |

## What reviewers say

### Solinst

[App page](https://appshunter.io/ios/app/solinst/id854408232)

This app enables wireless communication with Solinst dataloggers for programming, data download, and diagnostics. It allows for efficient field data collection by leveraging smartphone technology, eliminating the need for laptops. Users can also perform field calibrations for conductivity monitoring.

**Highlights:** Wireless datalogger communication, Start/stop sampling, Data downloading and emailing, Scheduled and repeat sampling, GPS coordinate logging, Datalogger diagnostics, Field calibration

**Features:** Vision Pro support

**In-app purchases:** none


### RSTAR Affinity Field Utility

[App page](https://appshunter.io/ios/app/rstar-affinity-field-utility/id1613603019)

This application streamlines the setup and management of geotechnical sensor networks. It automates device configuration, allowing for quick data logger setup and sensor addition via digital tags. The app provides real-time data analysis and reporting, simplifying field operations.

**Highlights:** Automated sensor network configuration, Bluetooth data logger integration, Digital tag scanning for sensor addition, Near real-time data analysis, Site-based digital map navigation, Configurable reports and data export, Remote monitoring with alerts and alarms

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Solinst free?

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

### Is RSTAR Affinity Field Utility free?

RSTAR Affinity Field Utility is free to download, with no in-app purchases.

### Which has better reviews, Solinst or RSTAR Affinity Field Utility?

RSTAR Affinity Field Utility is rated higher. Solinst averages 1.0 out of 5 from 7 ratings, while RSTAR Affinity Field Utility averages 3.5 from 2 ratings.

### Do Solinst or RSTAR Affinity Field Utility have ads?

Neither Solinst nor RSTAR Affinity Field Utility shows ads.

### Which is updated more often, Solinst or RSTAR Affinity Field Utility?

Solinst ships an update every 5 months, and RSTAR Affinity Field Utility every 6 weeks. Most recently, Solinst was updated on September 5, 2026 and RSTAR Affinity Field Utility on August 19, 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.*