# Fertitest Sky vs Clef

The clearest difference is iOS requirement: Clef at 11.0 against Fertitest Sky's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on June 26, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Fertitest Sky | Clef |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 37 MB | 84 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wisobus](https://appshunter.io/developer/1359690011) | [ANALYS INFORMATIQUE](https://appshunter.io/developer/1465595739) |

## What reviewers say

### Fertitest Sky

[App page](https://appshunter.io/ios/app/fertitest-sky/id6450293076)

This tool helps users accurately adjust their SKY fertilizer spreader. It offers personalized service, allows saving settings, and provides feedback options, all accessible offline.

**Highlights:** Adjust SKY fertilizer spreader, Personalized service, Memorize settings, Offline accessibility, User feedback system

**Features:** macOS Compatibility

**In-app purchases:** none


### Clef

[App page](https://appshunter.io/ios/app/clef/id6741418704)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fertitest Sky free?

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

### Is Clef free?

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

### Do Fertitest Sky or Clef have ads?

Neither Fertitest Sky nor Clef shows ads.

### Which is updated more often, Fertitest Sky or Clef?

Fertitest Sky ships an update every 2 months, and Clef every 2 months. Most recently, Fertitest Sky was updated on June 26, 2026 and Clef on September 7, 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.*