Comparison

KNOCK vs PO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KNOCK

Enhance your drum sounds with this audio plugin designed for professional mixing. It helps drums cut through the mix with a powerful, impactful sound. Optimized for ease of use, it suits both new and experienced music producers.

Highlights
  • Slap and punch through mixes
  • Signature drum sound
  • Extreme ease of use
  • Seamless workflow integration
  • Crafted by platinum producer
Features
Read full description

KNOCK is the last plugin you will ever need to make your drums slap and punch through your mix. This plugin was meticulously crafted by platinum producer & award winning sound designer, DECAP. It is inspired by the signature sound of his popular drum kit series DRUMS THAT KNOCK, which has helped shaped the sonics of modern music. KNOCK is optimized for extreme ease of use for beginners and professionals alike. Use KNOCK to make your drums slap, and take you to the next level. Whether you are new to producing, or a seasoned pro, KNOCK will seamlessly fit into your workflow.

About

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.

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
Read full description

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

KNOCK3 screens
PO4 screens

Verdict

The call

The clearest difference is price: PO at Free against KNOCK's $9.99. PO also leads on rating (5.0 vs 3.9) and update cadence (every 2 days vs every 39 months). KNOCK's advantage is ratings volume (21 vs 1) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

PO is free to download; KNOCK costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PO holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: KNOCK has 21 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

KNOCK ships an update every 39 months, PO every 2 days. Both last shipped on October 11, 2026.

Scorecard6 real differences · 4 level
KNOCK versus PO: the parameters behind the verdict, then further details
ParameterKNOCKPO
Price$9.99Free — better
Rating3.9 (21 ratings)5.0 (1 ratings) — better
Positive reviews57.9% of reviews—
Number of ratings21 — better1
Update frequencyEvery 39 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size9 MB12 MB
Age rating4+4+
DeveloperPlugins That KnockPhoton Consulting Limited

Customer experience

KNOCK

All ratings21 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews19 reviews
Positive57.9%
Neutral5.3%
Negative36.8%

PO

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

KNOCK

No in-app purchases

None

PO

No in-app purchases

Questions

Is KNOCK free?
KNOCK costs $9.99, with no in-app purchases.
Is PO free?
PO is free to download, with no in-app purchases.
Which has better reviews, KNOCK or PO?
PO is rated higher. KNOCK averages 3.9 out of 5 from 21 ratings, while PO averages 5.0 from 1 ratings.
Do KNOCK or PO have ads?
Neither KNOCK nor PO shows ads.
Which is updated more often, KNOCK or PO?
KNOCK ships an update every 39 months, and PO every 2 days. Most recently, KNOCK was updated on October 11, 2026 and PO on October 11, 2026.

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