De vs Doubler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
De
This audio plugin offers a trio of effects for vocal enhancement, including sibilance removal, vocal doubling, and noise gating. It features standard and multi-band modes for precise control over vocal processing.
- Sibilance removal (De-Esser)
- Vocal Doubler
- Noise Gate
- Standard and multi-band modes
- Visual frequency display
- Sibilance filter preview
- Limiter
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De-Esser is an AUv3 Compatible plugin for your favourite DAW such as Cubasis, Auria, AUM, Meteor, BM3 (does not work as a standalone app). This is actually a trio of effects all rolled into a single package which are ideally suited but not limited to voice recordings (De-Esser, a Vocal Doubler and a Noise Gate). This De-Esser is a great tool for removing sibilance from your vocals. Sibilance is the harsh over emphasising of phonetics such as 'ss', 'sh', 'ch', 'th' etc. which tend to be made worse during the recording process. This plugin has two modes of operation, 'standard' and 'multi-band' which can be used to effectively remove this kind of problem. The standard mode emulates the ducking of a volume control just like mixing engineers used to do in the good old days, but in this case uses a compressor driven by a filtered band of the input signal that contains the problematic frequencies. This is a common and effective method which has been tried and tested for many years. The multi-band mode uses a similar filtering mechanism to isolate the effected frequency band and applies a compressor to just that range in isolation. This method gives much more pleasing and natural results as it retains the overall volume level and only effects the specified frequency range. We also included a Vocal Doubler which simulates a multi-track vocal recording. It uses sophisticated techniques that eliminates the phase cancellation issues associated with layering vocals in this way. You have complete control over delay time, levels and stereo field placement. Finally this package incorporates a Noise Gate, to remove unwanted background noise from your recording. Fully configurable threshold, attack, release and dB reduction settings are available. A visual frequency display helps you quickly find and isolate the effected frequency ranges which can also be turned off to reduce CPU load. 4 different visual modes are available to help visualise issues. A siblance filter preview button lets you listen to the problematic frequencies in isolation and a limiter is available to make headroom for the vocal doubler. This is a great addition to our AUv3 plugin range which is heavily biassed towards recording of vocals.
Doubler
This real-time audio effect plugin creates a natural doubling sound for instruments and vocals. It adds richness and depth, making guitar parts sound massive and enabling flam-like effects on drums. Adjust variation parameters for precise control over the desired doubling effect.
- Real-time stereo doubling
- Enhances guitar, vocals, and polyphonic instruments
- Adds richness and depth
- Creates massive sound for riffs and solos
- Automatic vocal and instrument doubling
- Flam-like effects for drums
- Adjustable variation parameters
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The Nembrini Audio Doubler tracker turns your guitar performance into a stereo, double-tracked signal in real time, as if two guitarists were playing the same track left and right. Nembrini Audio Doubler is a plug-in designed to enhance your guitar, vocal or polyphonic instrument with a natural doubling effect, adding richness and depth. - Makes your guitar riffs and solos sound massive - Double vocal parts and polyphonic instrument automatically - Add flam-like effects to drums Just put Nembrini Audio real-time Doubler tracking plugin on your track, and adjust the variation parameters controls to create exactly the doubling effect you’re looking for Instant doubling. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect
Screenshots
Verdict
The clearest difference is review sentiment: De at 50% against Doubler's 0%. De also leads on ratings volume (19 vs 6) and iOS requirement (13 vs 15). Doubler's advantage is update cadence (monthly vs every 38 months) and rating (3.8 vs 3.4). On price, ads, in-app purchases and monetization model 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
De costs $9.99 and Doubler $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Doubler holds the better App Store score, 3.8 against 3.4. Both are backed by a comparable volume of ratings — 19 and 6 respectively. Written reviews complicate that: 50% of De's written reviews are positive against 0% of Doubler's, so the app with the better star average is not the one people write more warmly about.
De ships an update every 38 months, Doubler monthly. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.
| Parameter | De | Doubler |
|---|---|---|
| Price | $9.99 | $9.99 |
| Rating | 3.4 (19 ratings) | 3.8 (6 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 19 — better | 6 |
| Update frequency | Every 38 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 — better | 15 |
| Further details — not scored | ||
| Size | 6 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Nembrini Audio |
Customer experience
De
Doubler
In-app purchases
De
No in-app purchases
Doubler
No in-app purchases









