# Hilda Synthesizer vs Phase Monkey

The clearest difference is price: Phase Monkey at $5.99 against Hilda Synthesizer's $12.99. Hilda Synthesizer's advantage is review sentiment (90% vs 71%) and ratings volume (57 vs 17). On rating, update cadence, ads and in-app purchases there is nothing between them.

Hilda Synthesizer costs $12.99 and Phase Monkey $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Hilda Synthesizer against 4.8 for Phase Monkey. Both are backed by a comparable volume of ratings — 57 and 17 respectively. Written reviews are what separate them: 90% of Hilda Synthesizer's written reviews are positive against 71% of Phase Monkey's.

Hilda Synthesizer ships an update every 9 days, Phase Monkey weekly. The most recent releases landed on September 23, 2026 and July 16, 2026 respectively.

## The numbers

| Metric | Hilda Synthesizer | Phase Monkey |
| --- | --- | --- |
| Price | $12.99 | **$5.99** |
| Rating | **[4.9 (57 ratings)](https://appshunter.io/ios/app/hilda-synthesizer/id6447191659/reviews)** | [4.8 (17 ratings)](https://appshunter.io/ios/app/phase-monkey-poly-synth/id6452880369/reviews) |
| Number of ratings | **57** | 17 |
| Positive reviews | **90.0% of reviews** | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Paid | Paid |
| Size | 6 MB | 15 MB |
| Requires iOS | **12** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Bram Bos](https://appshunter.io/developer/325340444) | [Sketch Audio, LLC](https://appshunter.io/developer/1699093348) |

## What reviewers say

### Hilda Synthesizer

[App page](https://appshunter.io/ios/app/hilda-synthesizer/id6447191659)

This app offers a complex oscillator monosynth with a blend of west-coast and east-coast synthesis techniques. It features a wave folder, lowpass gate, 12-mode filter, and VCA circuit, all meticulously circuit-modelled for authentic analog or digital sound. It functions as a playable synth, MIDI sequencer, and audio effect.

**Highlights:** Complex Oscillator Monosynth, Wave folder and lowpass gate, 12-mode filter, Circuit-modelled analog sound, Built-in 16-step MIDI Sequencer, Audio effect for external audio, AUv3 compatibility

**Features:** Vision Pro support

**In-app purchases:** none


### Phase Monkey

[App page](https://appshunter.io/ios/app/phase-monkey-poly-synth/id6452880369)

Explore a versatile digital synthesizer inspired by 1980s phase distortion technology. Create a wide range of sounds from warm pads to aggressive basses with its unique engine and eight-stage envelopes. Optimized for touch interaction, it also supports MIDI controllers and runs across Apple devices.

**Highlights:** Phase distortion synth engine, Eight-stage envelopes, Touch-first interface, AUv3 plugin support, Universal Apple purchase, MIDI controller support, iCloud preset syncing

**In-app purchases:** none


## Frequently asked questions

### Is Hilda Synthesizer free?

Hilda Synthesizer costs $12.99, with no in-app purchases.

### Is Phase Monkey free?

Phase Monkey costs $5.99, with no in-app purchases.

### Which has better reviews, Hilda Synthesizer or Phase Monkey?

Hilda Synthesizer is rated higher. Hilda Synthesizer averages 4.9 out of 5 from 57 ratings, while Phase Monkey averages 4.8 from 17 ratings.

### Do Hilda Synthesizer or Phase Monkey have ads?

Neither Hilda Synthesizer nor Phase Monkey shows ads.

### Which is updated more often, Hilda Synthesizer or Phase Monkey?

Hilda Synthesizer ships an update every 9 days, and Phase Monkey weekly. Most recently, Hilda Synthesizer was updated on September 23, 2026 and Phase Monkey on July 16, 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.*