# Undulator vs yaleD

The clearest difference is rating: yaleD at 4.9 against Undulator's 4.3. yaleD also leads on update cadence (daily vs every 2 months) and price ($1.99 vs $7.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Undulator costs $7.99 and yaleD $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

yaleD holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 11 and 24 respectively. Written reviews point the same way: 86% of Undulator's written reviews are positive against 100% of yaleD's.

Undulator ships an update every 2 months, yaleD daily. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Undulator | yaleD |
| --- | --- | --- |
| Price | $7.99 | **$1.99** |
| Rating | [4.3 (11 ratings)](https://appshunter.io/ios/app/undulator/id1463822021/reviews) | **[4.9 (24 ratings)](https://appshunter.io/ios/app/yaled-reverse-delay/id1477503080/reviews)** |
| Number of ratings | 11 | **24** |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Paid | Paid |
| Size | 16 MB | 13 MB |
| Requires iOS | 11.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eventide](https://appshunter.io/developer/546518026) | [Sonosaurus LLC](https://appshunter.io/developer/338977569) |

## What reviewers say

### Undulator

[App page](https://appshunter.io/ios/app/undulator/id1463822021)

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

**In-app purchases:** none


### yaleD

[App page](https://appshunter.io/ios/app/yaled-reverse-delay/id1477503080)

This audio effect plugin creates a unique reverse delay sound. It offers detailed control over feedback, filtering, and timing, with options for synced beats or milliseconds. Ideal for musicians and producers seeking creative audio manipulation.

**Highlights:** Reverse delay audio effect, AUv3 plugin extension, Beat-synced or millisecond delay times, Feedback with cross-pan and filtering, Optional tape effect, One-Shot mode for triggered records, MIDI control and automation support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Undulator free?

Undulator costs $7.99, with no in-app purchases.

### Is yaleD free?

yaleD costs $1.99, with no in-app purchases.

### Which has better reviews, Undulator or yaleD?

yaleD is rated higher. Undulator averages 4.3 out of 5 from 11 ratings, while yaleD averages 4.9 from 24 ratings.

### Do Undulator or yaleD have ads?

Neither Undulator nor yaleD shows ads.

### Which is updated more often, Undulator or yaleD?

Undulator ships an update every 2 months, and yaleD daily. Most recently, Undulator was updated on October 7, 2026 and yaleD on September 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*