# KYP Project vs Sieslack

The clearest difference is ads: Sieslack at none against KYP Project's shown. Sieslack also leads on iOS requirement (11.0 vs 14.0). On price, update cadence, 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.

KYP Project ships an update every 4 months, Sieslack every 8 months. The most recent releases landed on September 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | KYP Project | Sieslack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 8 months |
| Size | 29 MB | 58 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Geckotech B.V.](https://appshunter.io/developer/658320061) | [Wolters Kluwer Tax & Accounting Deutschland GmbH](https://appshunter.io/developer/439837413) |

## What reviewers say

### KYP Project

[App page](https://appshunter.io/ios/app/kyp-project/id731412295)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sieslack

[App page](https://appshunter.io/ios/app/sieslack-app/id929034602)

**In-app purchases:** none


## Frequently asked questions

### Is KYP Project free?

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

### Is Sieslack free?

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

### Do KYP Project or Sieslack have ads?

KYP Project shows ads; Sieslack does not.

### Which is updated more often, KYP Project or Sieslack?

KYP Project ships an update every 4 months, and Sieslack every 8 months. Most recently, KYP Project was updated on September 10, 2026 and Sieslack on October 5, 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.*