# GroSens Smartbox vs Sentron

The clearest difference is update cadence: Sentron at every 5 weeks against GroSens Smartbox's every 3 months. GroSens Smartbox's advantage is iOS requirement (13.0 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 3.0 for GroSens Smartbox against 3.0 for Sentron. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

GroSens Smartbox ships an update every 3 months, Sentron every 5 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | GroSens Smartbox | Sentron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/grosens-smartbox/id1139154790/reviews) | [3.0 (2 ratings)](https://appshunter.io/ios/app/sentron/id1623135557/reviews) |
| Number of ratings | 2 | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 21 MB | 94 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rockwool International A/S](https://appshunter.io/developer/560117967) | [Sentron Europe B.V.](https://appshunter.io/developer/1623135559) |

## What reviewers say

### GroSens Smartbox

[App page](https://appshunter.io/ios/app/grosens-smartbox/id1139154790)

Monitor and optimize your growing environment with real-time data on substrate water content, EC, and temperature. Customize irrigation strategies with alerts to maintain precise control over your cultivation. Achieve precision growing with ease from any device.

**Highlights:** Real-time substrate water content monitoring, EC and temperature tracking, Customizable irrigation strategies, Alerts for target values, Precision growing insights, Cross-device accessibility

**Features:** macOS Compatibility

**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 GroSens Smartbox free?

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

### Is Sentron free?

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

### Which has better reviews, GroSens Smartbox or Sentron?

GroSens Smartbox and Sentron are both rated 3.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do GroSens Smartbox or Sentron have ads?

Neither GroSens Smartbox nor Sentron shows ads.

### Which is updated more often, GroSens Smartbox or Sentron?

GroSens Smartbox ships an update every 3 months, and Sentron every 5 weeks. Most recently, GroSens Smartbox was updated on November 2, 2026 and Sentron on November 3, 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.*