# FrobulatorAU vs PO

The clearest difference is update cadence: PO at every 2 days against FrobulatorAU's every 9 days. PO also leads on iOS requirement (15.0 vs 17.0). FrobulatorAU's advantage is ratings volume (8 vs 1). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for FrobulatorAU against 5.0 for PO. That said, the two scores are not equally well evidenced: FrobulatorAU has 8 ratings behind it against 1, so its average is the more settled of the two.

FrobulatorAU ships an update every 9 days, PO every 2 days. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | FrobulatorAU | PO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/frobulatorau/id6760205581/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/po-patchstudio/id6809190034/reviews) |
| Number of ratings | **8** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Free | Free |
| Size | 2 MB | 12 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matthew Caldwell](https://appshunter.io/developer/993500585) | [Photon Consulting Limited](https://appshunter.io/developer/6778625337) |

## What reviewers say

### FrobulatorAU

[App page](https://appshunter.io/ios/app/frobulatorau/id6760205581)

This audio effect plugin transforms sounds with spectral delay, adding unique character to music projects. It's a free and open-source tool designed for use in various audio applications, offering extensive creative possibilities.

**Highlights:** Spectral delay effect, AUv3 plugin, Use in GarageBand, AUM, and other DAWs, Multiple instances per project, Free and open-source, No ads or in-app purchases

**Features:** Vision Pro support

**In-app purchases:** none


### PO

[App page](https://appshunter.io/ios/app/po-patchstudio/id6809190034)

Design and edit drum sounds, kits, and patterns for Teenage Engineering's PO-32 Tonic. Transfer your creations to the device via audio. Back up and edit existing sounds, and import/export patches from Microtonic.

**Highlights:** Shape 16 sounds with 21 synth parameters, Program 16-step patterns with accents, Send kits, sounds, or patterns via audio, Back up and decode PO-32 data dumps, Import/export Microtonic patches, Local library with tags and favorites

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

**In-app purchases:** none


## Frequently asked questions

### Is FrobulatorAU free?

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

### Is PO free?

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

### Which has better reviews, FrobulatorAU or PO?

FrobulatorAU and PO are both rated 5.0 out of 5 on the App Store, from 8 and 1 ratings respectively.

### Do FrobulatorAU or PO have ads?

Neither FrobulatorAU nor PO shows ads.

### Which is updated more often, FrobulatorAU or PO?

FrobulatorAU ships an update every 9 days, and PO every 2 days. Most recently, FrobulatorAU was updated on October 1, 2026 and PO on October 11, 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.*