# PatchLens vs SL Bass

The clearest difference is price: PatchLens at Free against SL Bass's $14.99. SL Bass's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 17.0). On update cadence, ads and device support there is nothing between them.

PatchLens is free to download; SL Bass costs $14.99 up front. PatchLens sells 1 one-off in-app purchase. SL Bass asks for nothing beyond the download.

PatchLens ships an update weekly, SL Bass every 10 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | PatchLens | SL Bass |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Size | 7 MB | 99 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Clashware Sàrl](https://appshunter.io/developer/1837470365) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### PatchLens

[App page](https://appshunter.io/ios/app/patchlens-synth-patches/id6775509583)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $4.99 | one-time |


### SL Bass

[App page](https://appshunter.io/ios/app/sl-bass/id6810421676)

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

**In-app purchases:** none


## Frequently asked questions

### Is PatchLens free?

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

### Is SL Bass free?

SL Bass costs $14.99, with no in-app purchases.

### Do PatchLens or SL Bass have ads?

Neither PatchLens nor SL Bass shows ads.

### Which is updated more often, PatchLens or SL Bass?

PatchLens ships an update weekly, and SL Bass every 10 days. Most recently, PatchLens was updated on October 31, 2026 and SL Bass on October 31, 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.*