Comparison

TAIL Sampler vs SL Knock

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

Head to head
About

TAIL Sampler

Features
Currently charting
Read full description

Record a sound. Chop it. Spread it across 128 pads and sequence it into a beat. All of it with no noticeable lag. TAIL Sampler is a one-time purchase. No subscription, no ads, no account, no feature locked behind a second payment. WHAT YOU CAN DO โ€ข Record anything โ€” your voice, an instrument, a record, a field recording, any sound around you. โ€ข Chop and slice โ€” trim on the waveform and drag the markers to where the hit actually starts. โ€ข 128 pads โ€” 16 per bank, eight banks from A to H. Switching banks never cuts off a sound that is still playing. โ€ข Step sequencer โ€” 16 tracks, 16 steps, with swing. Kicks, snares, hats and percussion, and a groove going in seconds. โ€ข Tune every pad โ€” pitch, fine tune, attack and envelope, per pad. โ€ข Play it live โ€” trigger with your fingers or from an external MIDI controller. โ€ข Bounce and export โ€” render a sequence to WAV, or export your pads as WAV with the pitch baked in. โ€ข Save your projects โ€” close the app, come back, pick up where you stopped. โ€ข Background audio โ€” keep the sound running while you switch apps. Built on a low-latency audio engine, and touch-first: not a desktop interface squeezed onto a small screen. GET STARTED IN SECONDS 1. Record or import a sound. 2. Assign it to a pad. 3. Play. No project setup, no sign-in, no tutorial to sit through. FOR EVERY KIND OF MAKER โ€ข Beatmakers โ€” build grooves from your own one-shots and loops. โ€ข Producers โ€” capture raw ideas anywhere and refine them later. โ€ข Sound designers โ€” record and reshape real-world audio. โ€ข Performers โ€” trigger samples live with MIDI. Whether you are sketching on the train, capturing a field recording or playing live, TAIL keeps the workflow short so you stay in the idea.

About

SL Knock

Features
Read full description

SL Knock is a focused AUv3 dynamics and tone effect for adding punch, body and controlled low-end weight to drums, samples and loops. โ€ข Fast controls for impact and body โ€ข Tone shaping for tighter or heavier character โ€ข Mix control for parallel processing โ€ข Factory presets and local user presets โ€ข AUv3 support for compatible iPad music hosts Works as a standalone preview app and as an AUv3 effect in GarageBand, AUM, Cubasis, BeatMaker 3 and other compatible hosts.

Screenshots

TAIL Sampler4 screens
SL Knock3 screens

Verdict

The call

The clearest difference is update cadence: SL Knock at weekly against TAIL Sampler's every 5 weeks. TAIL Sampler's advantage is chart position (#187 vs unranked) and price ($4.99 vs $6.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

TAIL Sampler costs $4.99 and SL Knock $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TAIL Sampler ships an update every 5 weeks, SL Knock weekly. The most recent releases landed on October 25, 2026 and October 16, 2026 respectively.

Scorecard3 real differences ยท 4 level
TAIL Sampler versus SL Knock: the parameters behind the verdict, then further details
ParameterTAIL SamplerSL Knock
Price$4.99 โ€” better$6.99
Update frequencyEvery 5 weeksWeekly โ€” better
AdsNoNo
In-app purchasesNoNo
Best chart rank#187 โ€” betterโ€”
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS16.315.0 โ€” better
Further details โ€” not scored
Size5 MB28 MB
Age rating4+4+
DeveloperSolid Grid Systems GmbHVIACHESLAV ZHILTSOV

In-app purchases

None

TAIL Sampler

No in-app purchases

None

SL Knock

No in-app purchases

Questions

Is TAIL Sampler free?
TAIL Sampler costs $4.99, 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 weeks, and SL Knock weekly. Most recently, TAIL Sampler was updated on October 25, 2026 and SL Knock on October 16, 2026.

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