Comparison

ThermVoltGe 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

ThermVoltGe

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ThermVoltGe is a character-focused germanium distortion processor for iPhone and iPad. Use it as a standalone audio app or insert the included AUv3 effect in a compatible host such as GarageBand. Its nonlinear core is built around an OA91-style germanium-diode architecture. A low forward-voltage threshold, asymmetric conduction, temperature dependency, battery sag, and supply-voltage interaction create early compression and a soft, rounded clipping response. FEATURES - OA91-style germanium diode clipping - Temperature-dependent nonlinear response - Battery sag and supply-voltage control - Instrument and line input modes - Boost stage - Adjustable gain, high-pass filter, tone, drive, and output - 2x and 4x oversampling modes - Standalone iOS/iPadOS app - AUv3 audio effect for compatible hosts TRY BEFORE UNLOCKING The app provides 10 minutes of full-featured active use. Demo time advances only while the standalone app or AUv3 effect is actively being used. After the allowance is used, audio processing is disabled for 24 hours. A one-time, non-consumable In-App Purchase unlocks unlimited use in both the standalone app and AUv3 extension. Restore Purchases is available in the standalone app. Customers whose verified original app version is 1.0.2 or earlier retain full access automatically without an additional purchase. ThermVoltGe is designed for guitar, bass, synthesizers, keyboards, and other sources that benefit from compressed, harmonically rich germanium drive.

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

ThermVoltGe2 screens
SL Knock3 screens

Verdict

The call

The clearest difference is price: ThermVoltGe at Free against SL Knock's $6.99. SL Knock's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 2 months). On ads, 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

ThermVoltGe is free to download; SL Knock costs $6.99 up front. ThermVoltGe sells 1 one-off in-app purchase. SL Knock asks for nothing beyond the download.

UpkeepUpdate frequency

ThermVoltGe ships an update every 2 months, SL Knock weekly. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

Scorecard3 real differences ยท 3 level
ThermVoltGe versus SL Knock: the parameters behind the verdict, then further details
ParameterThermVoltGeSL Knock
PriceFree โ€” better$6.99
Update frequencyEvery 2 monthsWeekly โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS16.015.0 โ€” better
Further details โ€” not scored
Size28 MB28 MB
Age rating4+4+
DeveloperShoma KondoVIACHESLAV ZHILTSOV

In-app purchases

1 purchases

ThermVoltGe

One-time1
  • ThermVoltGe Full Version$4.99
None

SL Knock

No in-app purchases

Questions

Is ThermVoltGe free?
ThermVoltGe is free to download, with in-app purchases available.
Is SL Knock free?
SL Knock costs $6.99, with no in-app purchases.
Do ThermVoltGe or SL Knock have ads?
Neither ThermVoltGe nor SL Knock shows ads.
Which is updated more often, ThermVoltGe or SL Knock?
ThermVoltGe ships an update every 2 months, and SL Knock weekly. Most recently, ThermVoltGe was updated on October 12, 2026 and SL Knock on October 16, 2026.

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