Comparison

PatchLens vs SL Bass

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

Head to head
About

PatchLens

Features
Read full description

Save synth and pedal settings from a photo, then add editable hotspots and recall notes. The demo and 3 patch records stay free; Pro Lifetime is a one-time unlock. PatchLens helps musicians capture hardware synth, pedal, and semi-modular settings as private local patch records. Take or import a photo, mark the knobs and jacks that matter, add values and notes, then search your local patch library later. Optional on-device text recognition can suggest visible panel labels, but you stay in control of every saved value. PatchLens does not require an account, does not upload your photos, and does not promise automatic universal knob or cable detection. Pro Lifetime is a one-time in-app purchase that unlocks the full local patch library, on-device OCR label assist, and recall-sheet sharing. The bundled demo and 3 patch records stay free. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://bonega.ai/patchlens/privacy

About

SL Bass

Features
Read full description

SL Bass is a bass synth and 808 instrument for iPhone and iPad. Explore 146 factory presets and 102 bundled sample variants, then shape each sound with editable pitch and amplitude envelopes, mono and legato modes, glide, saturation and a playable keyboard. Use SL Bass as a standalone instrument or load it as an AUv3 in a compatible host such as GarageBand, Logic Pro for iPad, AUM or Cubasis. The interface adapts to compact iPhone and iPad windows while preserving direct touch control. Features: - 146 factory presets - 102 sample variants - Editable pitch and amplitude envelopes - Mono, legato and glide controls - Saturation and output control - Standalone app and AUv3 instrument - Local processing with no account or subscription SL Bass is an instrument and responds to MIDI notes. It does not process incoming audio as an effect. Support: support@sfoorlabs.com

Screenshots

PatchLens4 screens
SL Bass3 screens

Verdict

The call

The clearest difference is price: PatchLens at Free against SL Bass's $14.99. SL Bass's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 17.0). On update cadence, ads and device support 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

PatchLens is free to download; SL Bass costs $14.99 up front. PatchLens sells 1 one-off in-app purchase. SL Bass asks for nothing beyond the download.

UpkeepUpdate frequency

PatchLens ships an update weekly, SL Bass every 10 days. Both last shipped on October 31, 2026.

Scorecard3 real differences ยท 3 level
PatchLens versus SL Bass: the parameters behind the verdict, then further details
ParameterPatchLensSL Bass
PriceFree โ€” better$14.99
Update frequencyWeekly โ€” betterEvery 10 days
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size7 MB99 MB
Age rating4+4+
DeveloperClashware Sร rlVIACHESLAV ZHILTSOV

In-app purchases

1 purchases

PatchLens

One-time1
  • Pro Lifetime$4.99
None

SL Bass

No in-app purchases

Questions

Is PatchLens free?
PatchLens is free to download, with in-app purchases available.
Is SL Bass free?
SL Bass costs $14.99, with no in-app purchases.
Do PatchLens or SL Bass have ads?
Neither PatchLens nor SL Bass shows ads.
Which is updated more often, PatchLens or SL Bass?
PatchLens ships an update weekly, and SL Bass every 10 days. Most recently, PatchLens was updated on October 31, 2026 and SL Bass on October 31, 2026.

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