# PD1 vs Scaler EQ

The clearest difference is review sentiment: PD1 at 100% against Scaler EQ's 50%. PD1 also leads on price ($3.99 vs $12.99) and update cadence (every 6 days vs every 2 months). Scaler EQ's advantage is chart position (#194 vs unranked) and iOS requirement (15.0 vs 17.5). On ads, in-app purchases, monetization model and device support there is nothing between them.

PD1 costs $3.99 and Scaler EQ $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PD1 ships an update every 6 days, Scaler EQ every 2 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | PD1 | Scaler EQ |
| --- | --- | --- |
| Price | **$3.99** | $12.99 |
| Rating | — | **[4.6 (27 ratings)](https://appshunter.io/ios/app/scaler-eq/id6499342445/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#194** |
| Size | 10 MB | 27 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pedro Yamada](https://appshunter.io/developer/1604183940) | [Scaler Music](https://appshunter.io/developer/1603180477) |

## What reviewers say

### PD1

[App page](https://appshunter.io/ios/app/pd1-analog-delay/id6450869337)

This app simulates classic analog delay pedals, offering a meaner grit with a ladder filter and random delay-line noise. It's an audio-unit effect designed for musicians seeking unique delay sounds.

**Highlights:** Analog delay simulation, Ladder filter for meaner grit, Random delay-line noise, Audio-unit effect plugin, Classic pedal sound recreation

**Features:** Vision Pro support

**In-app purchases:** none


### Scaler EQ

[App page](https://appshunter.io/ios/app/scaler-eq/id6499342445)

**Currently charting:** #194 Top Paid · Music (US App Store)

This application offers a unique approach to audio equalization by intelligently adjusting frequencies based on the detected key and scale of your music. It provides both musical enhancements and traditional EQ controls for detailed sound shaping.

**Highlights:** In-key EQ with harmonic band types, Automatic key and scale detection, Familiar EQ controls with added color, Magic Shelf for enhanced low and high frequencies, Mastering-grade limiters and meters, Dynamic band control and sidechain input, Standalone and AUv3 host compatibility

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PD1 free?

PD1 costs $3.99, with no in-app purchases.

### Is Scaler EQ free?

Scaler EQ costs $12.99, with no in-app purchases.

### Do PD1 or Scaler EQ have ads?

Neither PD1 nor Scaler EQ shows ads.

### Which is updated more often, PD1 or Scaler EQ?

PD1 ships an update every 6 days, and Scaler EQ every 2 months. Most recently, PD1 was updated on October 15, 2026 and Scaler EQ on October 3, 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.*