TB DualVCF vs BLEASS Flanger
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TB DualVCF
This app offers a dual analog filter plug-in for music production, providing a wide range of vintage filter models to shape sound. It features intuitive modulation and envelope followers for creative audio exploration, compatible with AUv3 hosts.
- Dual analog filter sections
- Dozens of vintage filter models
- Envelope followers
- Intuitive modulation editor
- AUv3 plug-in compatibility
- Real-time audio processing
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Dual VCF - the ultimate dynamic filtering AUv3 plug-in! Dual VCF adds motion, shape, and colour. It produces evolving rhythmic movement and complex dynamic filter shapes. It contains dozens of analog filter models with that sought-after sound of the 70s, 80s and 90s. Combined with envelope followers and intuitive modulation editors, it provides almost infinite possibilities for creative aural exploration. Dual VCF features two filter sections, each supporting dozens of low-pass, high-pass and band-pass filter types. Every type is painstakenly modeled after analog filter types found in analog gear, analog synthesizers, and alike, including non-linear filter behavior. Dial in that characterstic 70s, 80s or 90s filter to add some analog flavor to your tracks! Each filter's cut-off frequency and resonance can be sequenced with an intuitive, free-running or beat-synced modulation editor. Seamlessly switch between sine, triangle, noise, or user-defined modulation waveforms. In addition, these parameters can also be modulated with the built-in envelope follower. The ToneBoosters DualVCF app captures the microphone (or external sound card) input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters DualVCF will appear in the list of Audio Unit extensions for effect plug-ins. How to use DualVCF as AUv3 plugin in a host program, start your favourite AUv3 host app (Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others) and add TB DualVCF as Audio Unit insert effect to a track or output bus. See below on how to use Audio Units in various host apps. Key features: - The same professional sound as the acclaimed desktop version - Two analog filter sections with dozens of filter designs - Intuitive modulation editor for creative, rhythmic and evolving effects - Undo/redo, and A/B comparison - Color themes for the user interface - Max screen support in Garageband - Optimised for iPad and compatible with iPhone and iPod Touch What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.
BLEASS Flanger
This audio effect app provides a modern take on classic flanging, offering flexible modulation sources, an envelope generator, and beat synchronization. It allows for complex and evolving timbral movement within your sound, with intuitive controls and efficient CPU usage.
- Flexible LFOs
- Envelope generator
- Beat synchronization
- Variable modulation routing
- Multi-mode input filter
- Stereo width control
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BLEASS Flanger harnesses the sonic characteristics of classic flanger effects and brings them fully up-to-date with a pair of flexible LFOs, variable modulation routing, an envelope generator and beat synchronisation. Classic flangers are a delay-based effect, and modulate the delay time to create the distinctive, repetitive flanged sound. But with BLEASS Flanger, multiple modulation sources are combined to create detailed, complex and evolving timbral movement within your sound. The addition of an envelope generator, which is triggered by the incoming signal, adds an additional dimension to the flanger effect, making it sensitive to the dynamics and nuances of your performances. The second LFO can take the sonic possibilities further still, with the option for it to modulate the delay’s feedback strength or stereo width. The tonal character of the effect can be controlled easily thanks to the multi-mode input filter, whilst the ability to synchronise the LFOs to the beat of your music allows you to explore completely new rhythmic and evolving effects. BLEASS’ trademark interface design ensures this powerful collection of tools are both easy and fun to work with, so you can harness their sonic versatility without ever hindering your musical creativity. And with super-efficient CPU usage, and compatibility with all major hosts and DAWs on desktop, iPad or iPhone, BLEASS Flanger is the only flanger you will ever need. More information on https://www.bleass.com/flanger/
Screenshots
Verdict
The clearest difference is update cadence: TB DualVCF at every 2 months against BLEASS Flanger's every 31 months. BLEASS Flanger's advantage is review sentiment (100% vs 80%) and price ($3.99 vs $4.99). On rating, ratings volume, ads and in-app purchases 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
TB DualVCF costs $4.99 and BLEASS Flanger $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for TB DualVCF against 5.0 for BLEASS Flanger. Both are backed by a comparable volume of ratings — 18 and 13 respectively. Written reviews are what separate them: 80% of TB DualVCF's written reviews are positive against 100% of BLEASS Flanger's.
TB DualVCF ships an update every 2 months, BLEASS Flanger every 31 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | TB DualVCF | BLEASS Flanger |
|---|---|---|
| Price | $4.99 | $3.99 — better |
| Rating | 4.9 (18 ratings) | 5.0 (13 ratings) — better |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 18 — better | 13 |
| Update frequency | Every 2 months — better | Every 31 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | ToneBoosters | BLEASS |
Customer experience
TB DualVCF
BLEASS Flanger
In-app purchases
TB DualVCF
No in-app purchases
BLEASS Flanger
No in-app purchases








