Comparison

Undulator vs MP1 Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Modulated tremolo effect
  • Ethereal feedback and detuned echoes
  • AM/FM modulation
  • Tempo sync
  • Real-time ribbon control
  • Multiple modulation waveforms
Read full description

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.

About

MP1 Pro

This app emulates a classic guitar preamplifier, offering versatile tone shaping with virtual tube circuits, a digital delay, and analog modulations. It includes a power amplifier, reverb, noise gate, and compressor for comprehensive sound control.

Highlights
  • Tri-State Voicing selection (Distortion Tube, Clean Tube, Solid State)
  • Four EL34 virtual tubes in power amplifier
  • Digital delay with Lo-Fi and offset controls
  • Analog Chorus or Tremolo modulation
  • Hall reverb algorithm
  • Tight, Low cut, and High cut filters
  • Analog noise gate
  • Studio compressor
Features
Read full description

PREAMPLIFIER Nembrini Audio MP1 Pro Guitar Amplifier plugin is based on a ADA MP1* preamplifier. Nembrini Audio MP1 Pro features a Tri-State Voicing selection that allows you to choose between Distortion Tube, Clean Tube, or Solid State virtual circuits. POWER AMPLIFIER Powered by four EL34 virtual tubes with presence, resonance, volume and power switch in class AB push-pull configuration. DIGITAL DELAY FILTER make the delay Lo-Fi and OFFSET create a time offset in left/right delay sections ANALOG MODULATIONS select Chorus or Tremolo modulation AMBIENT REVERB Hall reverb algorithm FILTERS CLEANER TIGHT filter suitable for 7 / 8 strings guitar, Low and High cut filters PRE and POST amplifier ANALOG NOISE GATE tuned for guitar and bass with GATE speed control STUDIO COMPRESSOR keep your dynamics in check, whether just thickening the sound or keeping levels consistent Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect. Legal Disclaimer: MP1 is a registered trademark of ADA Signal Processors, INC. Nembrini Audio MP1 Pro was developed by Nembrini Audio SRL based on its own modelling techniques. ADA Signal Processors, INC has not endorsed nor sponsored the Nembrini Audio MP1 Pro in any manner, nor licensed any intellectual property for use in this product.

Screenshots

Undulator3 screens
MP1 Pro2 screens

Verdict

The call

The clearest difference is update cadence: Undulator at every 2 months against MP1 Pro's every 44 months. Undulator also leads on price ($7.99 vs $9.99) and iOS requirement (11.0 vs 15). MP1 Pro's advantage is rating (4.6 vs 4.3). 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

CostPrice · In-app purchases · Ads · Monetization

Undulator costs $7.99 and MP1 Pro $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

MP1 Pro holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 11 and 9 respectively. Written reviews complicate that: 86% of Undulator's written reviews are positive against 80% of MP1 Pro's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Undulator ships an update every 2 months, MP1 Pro every 44 months. The most recent releases landed on September 21, 2026 and September 28, 2026 respectively.

Scorecard4 real differences · 6 level
Undulator versus MP1 Pro: the parameters behind the verdict, then further details
ParameterUndulatorMP1 Pro
Price$7.99 — better$9.99
Rating4.3 (11 ratings)4.6 (9 ratings) — better
Positive reviews85.7% of reviews — better80.0% of reviews
Number of ratings11 — better9
Update frequencyEvery 2 months — betterEvery 44 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15
Further details — not scored
Size16 MB28 MB
Age rating4+4+
DeveloperEventideNembrini Audio

Customer experience

Undulator

All ratings11 ratings
Positive81.8%
Neutral0.0%
Negative18.2%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

MP1 Pro

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

Undulator

No in-app purchases

None

MP1 Pro

No in-app purchases

Questions

Is Undulator free?
Undulator costs $7.99, with no in-app purchases.
Is MP1 Pro free?
MP1 Pro costs $9.99, with no in-app purchases.
Which has better reviews, Undulator or MP1 Pro?
MP1 Pro is rated higher. Undulator averages 4.3 out of 5 from 11 ratings, while MP1 Pro averages 4.6 from 9 ratings.
Do Undulator or MP1 Pro have ads?
Neither Undulator nor MP1 Pro shows ads.
Which is updated more often, Undulator or MP1 Pro?
Undulator ships an update every 2 months, and MP1 Pro every 44 months. Most recently, Undulator was updated on September 21, 2026 and MP1 Pro on September 28, 2026.

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