# TAIL Sampler vs SL Knock

The clearest difference is price: TAIL Sampler at $3.99 against SL Knock's $6.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

TAIL Sampler costs $3.99 and SL Knock $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TAIL Sampler ships an update every 5 days, SL Knock weekly. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | TAIL Sampler | SL Knock |
| --- | --- | --- |
| Price | **$3.99** | $6.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Size | 5 MB | 28 MB |
| Requires iOS | 16.3 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Solid Grid Systems GmbH](https://appshunter.io/developer/1895598591) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### TAIL Sampler

[App page](https://appshunter.io/ios/app/tail-sampler-beat-maker/id6795057060)

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

**In-app purchases:** none


### SL Knock

[App page](https://appshunter.io/ios/app/sl-knock/id6797349065)

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

**In-app purchases:** none


## Frequently asked questions

### Is TAIL Sampler free?

TAIL Sampler costs $3.99, with no in-app purchases.

### Is SL Knock free?

SL Knock costs $6.99, with no in-app purchases.

### Do TAIL Sampler or SL Knock have ads?

Neither TAIL Sampler nor SL Knock shows ads.

### Which is updated more often, TAIL Sampler or SL Knock?

TAIL Sampler ships an update every 5 days, and SL Knock weekly. Most recently, TAIL Sampler was updated on October 19, 2026 and SL Knock on October 16, 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.*