Harmonizr vs BLEASS Filter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Harmonizr
This app allows users to create vocal harmonies by singing along to a melody. It synthesizes up to three harmony voices in the user's own voice and can be controlled via MIDI input or used as an extension in other music production apps.
- Automatic vocal harmony synthesis
- Real-time key center selection
- MIDI keyboard integration
- On-screen MIDI keyboard
- Audio Unit (AUV3) extension support
- Control via MIDI controller apps
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Harmonizr is a vocal harmonizer offering a unique and fun user interface. Plug in a pair of headphones and sing a melody, tapping the correct key center buttons, and Harmonizr will follow, synthesizing up to three voices of automatic harmony in your own voice. Plug in a MIDI keyboard, or use the on-screen one, and you can sing harmony like Imogen Heap or Jacob Collier, matching every note you play. Harmonizr also can also be used as an Audio Unit (AUV3) extension within other apps, such as GarageBand, AUM, or Cubasis, and can be controlled by MIDI controller apps like SoundPrism.
BLEASS Filter
This app offers a stereo dynamic filter effect inspired by vintage analog synthesizers. It features an envelope follower and LFO for dynamic musical movement, providing a tactile user experience with detailed visual feedback.
- Stereo dynamic filter effect
- Vintage analog synth inspiration
- Envelope follower
- LFO with sync to beat
- Intuitive tactile interface
- Detailed visual feedback
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Inspired by the vintage analogue filters found on the world’s most renowned classic synths, and wrapped in our trademark super-modern interface design, BLEASS Filter delivers a great sound along with an intuitive and tactile user experience. The plugin also provides detailed visual feedback that can be read and understood at a glance. A static filter can be as dull as no filter at all, which is why we have included both an envelope follower and an LFO (Low Frequency Oscillator) in BLEASS Filter. The envelope follower can be tuned to perfectly match your audio, adding dynamic interest to your music, whilst the LFO creates repeating sweeps and movement that can run freely or sync to the beat. With superb versatility, ultra-efficient processing, and a great price, BLEASS Filter is guaranteed to bring new character and interest to your audio, and a smile to your face! BLEASS Filter is also available for Desktop visit www.bleass.com/filter for more information
Screenshots
Verdict
The clearest difference is rating: BLEASS Filter at 5.0 against Harmonizr's 4.2. BLEASS Filter also leads on price ($3.99 vs $4.99) and iOS requirement (11.0 vs 18.6). Harmonizr's advantage is update cadence (every 4 months vs every 18 months) and chart position (#184 vs unranked). On review sentiment, 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
Harmonizr costs $4.99 and BLEASS Filter $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
BLEASS Filter holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 27 and 22 respectively. Written reviews point the same way: 74% of Harmonizr's written reviews are positive against 80% of BLEASS Filter's.
Harmonizr ships an update every 4 months, BLEASS Filter every 18 months. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.
| Parameter | Harmonizr | BLEASS Filter |
|---|---|---|
| Price | $4.99 | $3.99 — better |
| Rating | 4.2 (27 ratings) | 5.0 (22 ratings) — better |
| Positive reviews | 73.9% of reviews | 80.0% of reviews — better |
| Number of ratings | 27 — better | 22 |
| Update frequency | Every 4 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #184 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew Robbins | BLEASS |
Customer experience
Harmonizr
BLEASS Filter
In-app purchases
Harmonizr
No in-app purchases
BLEASS Filter
No in-app purchases
