ADverb2 vs Undulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ADverb2
This app emulates a vintage digital plate reverb unit from the 80s, offering a range of reverb effects from short and rich to long and ambient. It functions as a standalone effect, with Inter-App Audio, or as an AUv3 plugin for music production hosts.
- Vintage digital plate reverb emulation
- Adjustable pre-delay, time, and size
- Extensive filtering for reverb tail shaping
- Logical vintage-style user interface
- Cross-platform preset manager
- Low CPU load optimized algorithm
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ADverb2 is our love letter to the golden age of studio reverb: a small handful of controls, a big friendly panel, and a sound that flatters everything you run through it. Version 2.3 grows it from one algorithm into three. PLATE is the original ADverb algorithm, a classic digital plate with the fast build-up and silky decay that made these boxes famous. It remains untouched, and your old presets load exactly as before. AMBIENCE is a modern, airy space. It adds air and dimension around a source without an obvious tail at short settings, and blooms into a long, weightless wash when you push the time out. Time-varying early energy keeps it from ever sounding static. HALL is a large concert space, exceptionally smooth and very wide, with slow internal motion that keeps long decays lush instead of metallic. All three algorithms share the same simple control set: Pre-Delay, Reverb Time, Size, low and high Contour switches, Rolloff, and Diffusion, plus input level and output mix. The Input Mute and Reverb Stop kill switches let you perform with the reverb, choking the send or the tail on the beat. Mix Lock keeps your wet/dry setting pinned while you audition presets, ideal when ADverb2 sits on a send. Version 2.3 also brings our system-wide preset browser with folders and favorites, a hundred factory presets covering everything from drum plates to nine-second ambient washes, preset stepping right from the main panel, and presets that show up in your host's own preset menu. ADverb2 is an AUv3 Audio Unit and runs in any AUv3 host, including GarageBand and Logic Pro. The interface is fully resizable and scales to fit your device. No accounts, no ads, no in-app purchases.
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.
Screenshots
Verdict
The clearest difference is update cadence: Undulator at every 2 months against ADverb2's every 50 months. Undulator also leads on iOS requirement (11.0 vs 16.0). ADverb2's advantage is rating (4.6 vs 4.3) and price ($4.99 vs $7.99). 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
ADverb2 costs $4.99 and Undulator $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ADverb2 holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 19 and 12 respectively. Written reviews complicate that: 80% of ADverb2's written reviews are positive against 86% of Undulator's, so the app with the better star average is not the one people write more warmly about.
ADverb2 ships an update every 50 months, Undulator every 2 months. Both last shipped on October 24, 2026.
| Parameter | ADverb2 | Undulator |
|---|---|---|
| Price | $4.99 — better | $7.99 |
| Rating | 4.6 (19 ratings) — better | 4.3 (12 ratings) |
| Positive reviews | 80.0% of reviews | 85.7% of reviews — better |
| Number of ratings | 19 — better | 12 |
| Update frequency | Every 50 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Audio Damage, Inc. | Eventide |
Customer experience
ADverb2
Undulator
In-app purchases
ADverb2
No in-app purchases
Undulator
No in-app purchases









