# Greentest vs Trekr

The clearest difference is update cadence: Trekr at weekly against Greentest's every 3 months. Greentest's advantage is iOS requirement (15.6 vs 17.6). 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.

Greentest ships an update every 3 months, Trekr weekly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Greentest | Trekr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/greentest/id1206278467/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 27.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 41 MB | 17 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Shenzhen Greentest Science and Technology Co.Ltd](https://appshunter.io/developer/1234084145) | [Akansh Anish](https://appshunter.io/developer/1890242046) |

## What reviewers say

### Greentest

[App page](https://appshunter.io/ios/app/greentest/id1206278467)

This app connects to a smart device to analyze nitrate levels in food and water hardness. It also detects background radioactivity. Ensure Bluetooth is enabled on your mobile device for seamless connection and testing.

**Highlights:** Nitrate level analysis, Water hardness testing (TDS), Background radioactivity detection, Bluetooth device connectivity, Certified safety and accuracy

**Features:** Vision Pro support

**In-app purchases:** none


### Trekr

[App page](https://appshunter.io/ios/app/trekr/id6761550987)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Greentest free?

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

### Is Trekr free?

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

### Do Greentest or Trekr have ads?

Neither Greentest nor Trekr shows ads.

### Which is updated more often, Greentest or Trekr?

Greentest ships an update every 3 months, and Trekr weekly. Most recently, Greentest was updated on October 7, 2026 and Trekr on October 1, 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.*