# Ruskin vs Sentron

The clearest difference is update cadence: Sentron at every 5 weeks against Ruskin's every 4 months. Ruskin's advantage is iOS requirement (12.0 vs 15.0). 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.

Ruskin ships an update every 4 months, Sentron every 5 weeks. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Ruskin | Sentron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/sentron/id1623135557/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 79 MB | 94 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RBR Ltd](https://appshunter.io/developer/654709752) | [Sentron Europe B.V.](https://appshunter.io/developer/1623135559) |

## What reviewers say

### Ruskin

[App page](https://appshunter.io/ios/app/ruskin/id654709749)

Wirelessly configure loggers, download, and display datasets. View profiles, tags, and downloads on a map, and record detailed location information during deployments.

**Highlights:** Wireless logger configuration, Dataset download and display, Map view for profiles and tags, Location tracking during deployments, Data synchronization to office

**In-app purchases:** none


### Sentron

[App page](https://appshunter.io/ios/app/sentron/id1623135557)

Transform your mobile device into a sophisticated pH meter. Connect wirelessly to specialized probes for accurate measurements in various applications. The app guides you through calibration, data logging, and export.

**Highlights:** Wireless pH/EC measurement, Bluetooth probe connectivity, Step-by-step calibration, Data logging and graphing, GPS data mapping, Automatic temperature compensation

**In-app purchases:** none


## Frequently asked questions

### Is Ruskin free?

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

### Is Sentron free?

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

### Do Ruskin or Sentron have ads?

Neither Ruskin nor Sentron shows ads.

### Which is updated more often, Ruskin or Sentron?

Ruskin ships an update every 4 months, and Sentron every 5 weeks. Most recently, Ruskin was updated on October 13, 2026 and Sentron on October 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.*