Spatializer vs BLEASS Dragonfly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spatializer
Enhance audio with stereo widening that preserves mono compatibility and avoids phase issues. This tool synthesizes side channel information, ideal for mono sources or adding depth to existing stereo tracks without compromising the mid channel.
- Stereo widening without phase smearing
- Synthesizes side channel information
- Preserves mid channel integrity
- Flexible for mono and stereo sources
- Transparent or strong effect options
- Multiband transient shapers
- Directional RMS distribution visualization
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Spatializer is a great choice if you want to widen your sounds but need to avoid: • phase smearing in the mono mix • phasing / comb filter effects (from asymmetric channel delays) • or any changes to the mid channel or mono mix The plugin's main focus is to enhance sounds that have little or no side channel information, where traditional widening approaches like mid-side processing can't be effectively used. It also offers more flexibility in case of mixed inputs, widening narrow components without boosting already existing stereo width to extreme levels that would drown out the mid channel, leading to stereo image problems. Spatializer can also be combined with other effects, for example it's excellent for augmenting large-scale reverbs by enhancing the more immediate space or effectively moving the listener closer to the virtual sound source. At large timescales, the plugin takes on some of the qualities of a reverb itself, while keeping the mid channel sharp and free of any reflections. This could either be used as a special effect in and of itself (depending on the transient characteristics of the input), or be blended together with traditional ambience or acoustic space simulation effects. FEATURES: • Synthesis of side channel information where there was none (stereoization of mono sources) • Linear phase mid channel • Capability to deliver both a neutral / transparent response as well as stronger effects • Built-in multiband transient shapers for delivering a more focused response by suppressing outlier reflections • Multiple visualization options: Directional RMS distribution, position and motion • Effects can range from close-proximity / spatial audio effects to larger acoustic space reflections • Baseline frequency response is optimized to maximize flatness, balancing the spectral density of Left, Right, Side channels The built-in selection of subtly tuned presets and the combined psychoacoustic properties of the above features give more leeway to easily experiment with kinds of source material that have traditionally presented difficulties, like tracks with prominent LF content. Due to its ability to provide transparent, subtle and high-clarity responses, as well as good spectral density characteristics, Spatializer can also be included in master bus effects chains. In multi-track setups it can be used in parallel with other positioning methods to bring more variation to the sound stage or to provide additional ways to adjust the mix. For audio demos, visit: www.quantovox.com/sp PLEASE NOTE: • AUv3-compatible host application required • Supported sampling rates: 22.05, 44.1, 48, 96 kHz.
BLEASS Dragonfly
This audio effect plugin offers a unique approach to tremolo, allowing music producers to add dynamic modulation to synths, vocals, and melodies. It syncs tremolo effects with input frequencies, MIDI notes, or sidechained signals for creative sonic textures.
- Pitch tracking for self or sidechain modes
- MIDI input for precise triggering
- Manual rate and amplitude control
- Adjustable smoothing, stereo, attack, and release
- Wild mode for saturation and waveshaping
- Animated visualization of effect rate
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BLEASS Dragonfly is a completely new approach to tremolo effect which brings new sonic possibilities to all music producers. Make your synths, voices or any melody “vibrate” in correspondence with its own frequencies, or with external basses and leads! Just like in Billie Eilish’s song “Xanny”, Dragonfly helps you achieve the same effect as when the voice gets modulated by a heavy bass. BLEASS Dragonfly automatically syncs the tremolo effect applied on a track using various triggers: First, you can use the pitch tracking module on either the input audio track (“self mode”) or a sidechained audio track (“sidechain mode”). You also can use the midi input to trigger Dragonfly with accuracy: the tremolo will automatically sync with the notes’ frequencies. Finally, a manual mode allows you to set a fixed frequency. Then you can finetune your settings by adjusting the fine, factor, smoothness, stereo, attack & release. The “Wild” mode applies a waveshaper to the signal to produce a subtle saturation. The final tremolo effect rate is mirrored by the flapping wings of the Dragonfly. BLEASS Dragonfly is also available for Mac & Windows (AU / VST3) https://www.bleass.com/dragonfly/ ________________________________________________ Technical description: SOURCE stage: - MANUAL: Tremolo rate is set by the Rate knob. Tremolo amplitude is set by the Amplitude knob. - MIDI: Tremolo rate corresponds to the rate of the lowest MIDI note received by the plugin. Tremolo amplitude corresponds to the velocity value of this note. - SELF: Pitch tracking on the input signal gives the tremolo rate. Tremolo amplitude matches the input signal’s amplitude. - SIDECHAIN: Pitch tracking on the sidechain signal gives the tremolo rate. Tremolo amplitude matches the sidechain signal’s amplitude. - SOURCE CHANNEL: Sets the channel to be analysed for SELF and SIDECHAIN modes. - AMPLITUDE: Sets tremolo amplitude in MANUAL mode. - GAIN: Sets the input gain in MIDI, SELF and SIDECHAIN modes. DRAGONFLY stage: - RATE: Sets tremolo rate in MANUAL mode. - FINE: Offsets the detected pitch value by +/- 0.5 semitone in MIDI, SELF and SIDECHAIN mode. - FACTOR: Detected or set rate is multiplied by this factor to give the final tremolo rate. - SMOOTH: Sets the smoothing duration of rate variations. - STEREO: Sets phase difference between left and right channels. - ATTACK: Attack duration of the effect. - RELEASE: Release duration of the effect. - MODE: SIMPLE is a basic tremolo. WILD uses complex waveshaping for warm and saturated effect. - WILDNESS: Sets waveshaping strength in WILD mode. - VISUALISATION: Dragonfly wings are animated to match the rate and amplitude of the effect. Green label on the left indicates the input MIDI note and rate. Blue label on the right indicates the applied MIDI note and Rate. MIX stage: - GAIN: Output gain of the effect. - DRY/WET: Dry/wet balance. NOTE: This is an AUv3 effect which needs a compatible host that ideally offers audio sidechain or MIDI FX routing (such as AUM, Cubasis 3 or Logic)
Screenshots
Verdict
The clearest difference is update cadence: Spatializer at every 2 months against BLEASS Dragonfly's every 24 months. Spatializer also leads on review sentiment (91% vs 75%) and price ($6.99 vs $7.99). 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
Spatializer costs $6.99 and BLEASS Dragonfly $7.99 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 — 4.8 for Spatializer against 4.8 for BLEASS Dragonfly. Both are backed by a comparable volume of ratings — 27 and 19 respectively. Written reviews are what separate them: 91% of Spatializer's written reviews are positive against 75% of BLEASS Dragonfly's.
Spatializer ships an update every 2 months, BLEASS Dragonfly every 24 months. Both last shipped on November 3, 2026.
| Parameter | Spatializer | BLEASS Dragonfly |
|---|---|---|
| Price | $6.99 — better | $7.99 |
| Rating | 4.8 (27 ratings) | 4.8 (19 ratings) — better |
| Positive reviews | 90.9% of reviews — better | 75.0% of reviews |
| Number of ratings | 27 — better | 19 |
| Update frequency | Every 2 months — better | Every 24 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | quantovox | BLEASS |
Customer experience
Spatializer
BLEASS Dragonfly
In-app purchases
Spatializer
No in-app purchases
BLEASS Dragonfly
No in-app purchases









