# iSyn Poly vs Hilda Synthesizer

The clearest difference is price: iSyn Poly at $0.99 against Hilda Synthesizer's $12.99. iSyn Poly also leads on iOS requirement (8.0 vs 12). Hilda Synthesizer's advantage is update cadence (every 9 days vs every 6 months) and review sentiment (90% vs 64%). On ads, in-app purchases and monetization model there is nothing between them.

iSyn Poly costs $0.99 and Hilda Synthesizer $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSyn Poly ships an update every 6 months, Hilda Synthesizer every 9 days. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | iSyn Poly | Hilda Synthesizer |
| --- | --- | --- |
| Price | **$0.99** | $12.99 |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/isyn-poly/id443141370/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 64.0% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 19 MB | 6 MB |
| Requires iOS | **8.0** | 12 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Harry Gohs](https://appshunter.io/developer/382428644) | [Bram Bos](https://appshunter.io/developer/325340444) |

## What reviewers say

### iSyn Poly

[App page](https://appshunter.io/ios/app/isyn-poly/id443141370)

Create electronic music with three virtual analog synthesizers and a drum machine. Features a full sequencer for arranging songs and live editing capabilities. Supports external MIDI keyboards for enhanced control.

**Highlights:** Three programmable virtual analog synthesizers, Sample playback drum machine with 17 kits, Full-featured four-track sequencer, Gesture-oriented user interface for live editing, Support for CoreMIDI compatible hardware keyboards, Global effects unit with phaser, flanger, chorus, and delay

**In-app purchases:** none


### 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


## Frequently asked questions

### Is iSyn Poly free?

iSyn Poly costs $0.99, with no in-app purchases.

### Is Hilda Synthesizer free?

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

### Do iSyn Poly or Hilda Synthesizer have ads?

Neither iSyn Poly nor Hilda Synthesizer shows ads.

### Which is updated more often, iSyn Poly or Hilda Synthesizer?

iSyn Poly ships an update every 6 months, and Hilda Synthesizer every 9 days. Most recently, iSyn Poly was updated on October 23, 2026 and Hilda Synthesizer on October 30, 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.*