Undulator vs WOOTT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Undulator
This app offers a classic modulated tremolo effect inspired by a renowned hardware processor. It allows musicians to add rhythmic movement, ethereal feedback, and detuned echoes to various instruments and samples, creating evolving soundscapes and dynamic textures.
- Modulated tremolo effect
- Ethereal feedback and detuned echoes
- AM/FM modulation
- Tempo sync
- Real-time ribbon control
- Multiple modulation waveforms
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Undulator is Eventide’s classic modulated tremolo effect from the iconic H3000 effects processor. This unique, rhythmic effect combines ethereal feedback and detuned echos, run through an AM / FM modulated tremolo. Whether used for manipulating samples or adding movement to strings, pads, guitars, and keys, Undulator is a muse for creative musicians. Add Undulator into your plug-ins collection for the most playable tremolo-style effect on your DAW or iOS device. Undulator excels at evolving pads, sync’d chops, and time-lapsing dreamy soundscapes. Combined with a multi-tap delay and powerful tremolo, Undulator’s controls give any sound sustain and shape. This is perfect for transforming ordinary synths, keys, guitars, and even vocals into evolving pads, tempo synced production elements, or ethereal and fluctuant delays. Simply put, Undulator can make shorter sounds into longer layered effects, and give sustaining sounds shape and rhythmic character. Use the Ribbon to morph tremolo patterns into vacillating and varying rhythmic territories. This can be effective for calling attention to synth pads and creating a state of flux or rarity which is otherwise arduous to achieve. - Turn up the MIX to increase the dry/effect ratio. - Utilize multiple modulation waveform shapes and sources to alter the rhythmic feel. - Subtly finesse detuning of delays by using SPREAD. - Add FEEDBACK to accentuate delays or create infinite loops. - The Secondary LFO determines how fast the depth and speed modulation “wiggle” their targets. - Lock the tremolo to tempo using SYNC. - RETRIG at the top of the waveform for a more predictable effect. - RIBBON lets you ‘play’ the effect in real-time and provides dynamic and fluid control to morph back and forth between the settings of your choice. - SLOW/FAST button toggles on a “Slow LFO” mode. Holding it down to “BRAKE” temporarily slows down the LFOs at a constant rate until released. - Update the tremolo speed in real time using the TAP button. - Available as an AUv3 plug-in and Standalone App.
WOOTT
This audio effect plugin enhances sounds by simultaneously compressing loud elements and amplifying quiet ones. It's designed to add massive proportions, aggressive edges, and bring out subtle details in audio, making it ideal for producers looking to add hype and excitement to their tracks.
- Triple band dynamics algorithm
- Simultaneous downwards and upwards compression
- Dedicated limiter per band
- AUv3 audio unit effect plugin
- Universal support (iOS and macOS)
- Multi-output capability
- Mono switch for low-band signal
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WOOTT is an Audio Unit plugin (AUv3 audio effect) inspired by the infamous OTT sound. WOOTT uses a triple band dynamics algorithm with simultaneous downwards AND upwards compression, and adds a dedicated limiter to each band. So what's all that techno mumbojumbo good for? 1. First, it slams all the loud, dominant aspects of your sound 2. Next it blows up all the subtle quiet bits that were hiding below As a result, it's perfect for: - Blowing up average sounds to massive proportions - Giving an aggressive sharp edge to synthesizer filters - Bringing out subtle details and movement that would otherwise get lost in the mix (in a hamfisted way, though) - Dusting off old breakbeat samples and loops - Hyping specific aspects of your synth lines - Making generally boring things more interesting WOOTT features: - AUv3 audio unit effect plugin - Universal (all iPads and iPhones supported + MacOS M & Intel) - Runs in all your favorite AUv3 plugin hosts: Cubasis, AUM, Beatmaker 3, Nanostudio 2, Garageband, etc. - Multi-output (requires compatible host) for post-processing the individual bands - Low-resource, so stack as many of them as you like - "[WO]OTT all the things!" - Downwards *and* upwards compressors (a rare feature on conventional dynamics plugins) - Smart soft limiter per band, adapts to its own band's specific settings - Mono switch makes low-band signal monaural for an extra tight bass Note: this is not a subtle effect. If subtle and minimal are what you're after, this is not the droid you're looking for :-)
Screenshots
Verdict
The clearest difference is rating: WOOTT at 4.9 against Undulator's 4.3. WOOTT also leads on price ($4.99 vs $7.99) and chart position (#171 vs unranked). On review sentiment, update cadence, 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
Undulator costs $7.99 and WOOTT $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WOOTT holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 11 and 54 respectively. Written reviews point the same way: 86% of Undulator's written reviews are positive against 92% of WOOTT's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.
| Parameter | Undulator | WOOTT |
|---|---|---|
| Price | $7.99 | $4.99 — better |
| Rating | 4.3 (11 ratings) | 4.9 (54 ratings) — better |
| Positive reviews | 85.7% of reviews | 91.7% of reviews — better |
| Number of ratings | 11 | 54 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #171 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 16 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Eventide | Bram Bos |
Customer experience
Undulator
WOOTT
In-app purchases
Undulator
No in-app purchases
WOOTT
No in-app purchases









