# GroSens Smartbox vs DrainMaster Plus

The clearest difference is in-app purchases: GroSens Smartbox at none against DrainMaster Plus's 5. GroSens Smartbox also leads on iOS requirement (13.0 vs 16.4). DrainMaster Plus's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. DrainMaster Plus sells 5 in-app purchases, starting at $3.99 per month. GroSens Smartbox asks for nothing beyond the download.

GroSens Smartbox ships an update every 3 months, DrainMaster Plus every 2 weeks. The most recent releases landed on October 12, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | GroSens Smartbox | DrainMaster Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/grosens-smartbox/id1139154790/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 21 MB | 82 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Rockwool International A/S](https://appshunter.io/developer/560117967) | [kobosil.me Development](https://appshunter.io/developer/951054288) |

## 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


### DrainMaster Plus

[App page](https://appshunter.io/ios/app/drainmaster-plus-ec-and-ph/id6752567739)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DrainMaster Cloud Monthly | $3.99 | per month |
| 50 Credits | $1.99 | one-time |
| 150 Coins | $3.99 | one-time |
| 400 Coins | $8.99 | one-time |
| 1000 Coins | $17.99 | one-time |


## Frequently asked questions

### Is GroSens Smartbox free?

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

### Is DrainMaster Plus free?

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

### Do GroSens Smartbox or DrainMaster Plus have ads?

Neither GroSens Smartbox nor DrainMaster Plus shows ads.

### Which is updated more often, GroSens Smartbox or DrainMaster Plus?

GroSens Smartbox ships an update every 3 months, and DrainMaster Plus every 2 weeks. Most recently, GroSens Smartbox was updated on October 12, 2026 and DrainMaster Plus on October 30, 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.*