LA Comp vs SL Knock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LA Comp
This audio effect plugin offers a vintage-inspired optical compressor with modern flexibility. It provides in-depth control over dynamics, tube flavors, and stereo width, allowing for precise sound shaping on vocals and mixes. Compatible across multiple platforms for on-the-go creativity.
- Vintage and modern optical compression
- Multiple tube flavor options
- Auto-Gain functionality
- Emphasis frequency control
- Stereo spread for width
- Side-chain input
- Cross-platform presets
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Legendary sound with a modern twist. LA Comp reimagines a studio classic with unmistakable vintage tone bringing in-depth control. Whether you're crafting silky vocal lines or adding punch to your mix, it's got the soul of a legend with a twist of modern-day flexibility. Optical dynamics with ease. With side-chain, auto-gain, and in-depth control over tube and optical elements, you’ll have everything you need to shape your sound in ways you never imagined. Mix anywhere. Anytime. From the studio to your mobile rig, LA Comp is ready. With VST3, AAX, AU, and AUv3 compatibility across macOS, Windows, iPhone, and iPad, your sound goes wherever inspiration strikes—without compromising quality or control. Features -10 included cross-platform presets for instant inspiration -Auto-Gain to keep the focus on your dynamics -Analog warmth and drive with three tube flavors: Vintage, Modern, and Stock -Gain reduction (Mono or Stereo) and calculation options (RMS or Peak) -Emphasis frequency control for tailored compression -Stereo spread for enhanced width and space -Side-chain input for creative mixing and shaping -Allows external audio device use Fully compatible with VST3, AAX, AU, and AUv3.* *AUv3 and standalone only on iOS. Mac/PC (Sold separately) required for VST3 and AAX.
SL Knock
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SL Knock is a focused AUv3 dynamics and tone effect for adding punch, body and controlled low-end weight to drums, samples and loops. • Fast controls for impact and body • Tone shaping for tighter or heavier character • Mix control for parallel processing • Factory presets and local user presets • 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
Verdict
The clearest difference is update cadence: SL Knock at every 5 days against LA Comp's every 3 weeks. SL Knock also leads on price ($6.99 vs $9.99). LA Comp's advantage is 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
LA Comp costs $9.99 and SL Knock $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LA Comp ships an update every 3 weeks, SL Knock every 5 days. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.
| Parameter | LA Comp | SL Knock |
|---|---|---|
| Price | $9.99 | $6.99 — better |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 51 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | OSC Audio | VIACHESLAV ZHILTSOV |
In-app purchases
LA Comp
No in-app purchases
SL Knock
No in-app purchases









