NebulizerAU vs PO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NebulizerAU
This audio effect plugin emulates the sound of an old-school, warbly tape delay. It functions as an AUv3 effect, allowing it to be used on multiple tracks within various audio applications. It delivers a distinct lo-fi sound.
- AUv3 effect plugin
- Tape delay emulation
- Lo-fi sound character
- Stackable on multiple tracks
- Compatible with GarageBand, AUM
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Old school warbly malfunctioning tape delay Nebulizer comes echoing back from the IAA doldrums. But fear not. Even though it's now an AUv3 effect plugin, ready to stack up on multiple tracks in GarageBand, AUM or your favourite audio application, it's still the wayward lo-fi monstrosity you used to know. And if you didn't know it, isn't it about time you did? Nebulizer is totally free. No ads, no in-app purchases, no subscriptions, no surveillance, no nag screens. If you want premium features, this is not the app for you.
PO
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.
- 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
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PO-PatchStudio designs drum sounds, kits and patterns for Teenage Engineering's PO-32 Tonic, then sends them to your Pocket Operator over sound. Free, with no ads and no account. The PO-32 has no USB data connection. It loads new sounds the way an old modem does, by listening through its microphone. So this app does the fiddly part on a proper screen: build a kit, hold your phone next to the PO-32 and press play. WHAT YOU CAN DO - Shape all 16 sounds with the full set of 21 synth parameters, plus both ends of the morph - Program 16-step patterns on the pads, with accents, and hear them before you send - Send a whole kit, a single sound or a pattern to the PO-32 over audio - Back up your PO-32: record its data dump through the microphone and the app decodes it into a kit you can edit - Import Microtonic .mtdrum and .mtpreset patches, including files from older versions of Microtonic, and export your sounds back out - Keep kits, sounds and patterns in a local library with tags and favourites WORKS WITH - PO-32 Tonic - Also sends drum sounds to the PO-35 Speak's built-in Tonic channel HOW TRANSFER WORKS Put the PO-32 in receive mode (press acc + sound), turn your phone's volume up and play the transfer into the PO-32's mic. To back up, start recording in the app, then hold write and press sound on the PO-32. Previews come from an open-source recreation of the PO-32's synth, so they sound close to the hardware but not identical. Once a sound is on the PO-32, it plays through the device's own engine. A NOTE FROM ME I'm a solo developer and a PO-32 owner. PO-PatchStudio stands on the open-source libpo32 library by Eric Lewis and years of reverse-engineering by the Pocket Operator community, which is why it's free. If something is missing or broken, tell me. Not affiliated with or endorsed by Teenage Engineering AB or NuEdge Development AB. Pocket Operator, PO-32 and Tonic are trademarks of Teenage Engineering AB. Microtonic is a trademark of NuEdge Development AB.
Screenshots
Verdict
The clearest difference is ratings volume: NebulizerAU at 3 against PO's 1. On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 NebulizerAU against 5.0 for PO. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
NebulizerAU ships an update daily, PO every 2 days. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.
| Parameter | NebulizerAU | PO |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Number of ratings | 3 — better | 1 |
| Update frequency | Daily — better | Every 2 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew Caldwell | Photon Consulting Limited |
Customer experience
NebulizerAU
PO
In-app purchases
NebulizerAU
No in-app purchases
PO
No in-app purchases









