Features & Capabilities

Hilda is a Complex Oscillator Monosynth, inspired by the most interesting aspects of both west-coast and east-coast synthesis techniques. You'll find a wave folder, lowpass gate, and audio-rate modulations, but also a 12-mode filter and traditional VCA circuit. All parts of the instrument are carefully circuit-modelled to sound as analog (or digital, where applicable) as possible. It's like a best-of-all-worlds semi modular synth, but without the patch cables.

The unique mix of different synthesis components adds up to a unique sounding electronic instrument, which can be used as a playable synthesizer, a MIDI sequencer and an audio effect for external audio - or any combination of those three.

  • Full Audio Unit compatibility (AUv3 instrument, audio effect and MIDI processor modes supported)
  • Universal design (iPhone and iPad; iPad Air 2 or higher recommended)
  • Built-in analog style 16 Step MIDI Sequencer with custom scales
  • 12 mode filter, based on the Oberheim Xpander design
  • Drone mode lets you [partially] bypass the VCA/LPG and just go with the flow
  • DIY Lo-Fi digital delay circuit emulation
  • Live pads with effects that can be triggered via the UI (or via exposed AU Parameters)
  • All synth settings exposed a AU Parameters (for automation and MIDI learning in your host of choice)
  • MIDI Processor plugin mode disables synth to save CPU
  • Carefully handcrafted by yours truly, to capture the essence of my love for tinkering and experimenting with sound :-)

Find the user manual on ruismaker.com

User Growth & Download Statistics

App
By:
Bram Bos
Rating:
5.00
(24)
Version:
1.3.1 Last updated: 2025-03-05
Version code:
872989686
Creation date:
2023-05-04
Compatible devices:
Size:
6.44MB
Price:
12.99
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-05
Compare stats and ranking:

Ranking

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
Bram Bos
Apple Apps Store
https://apps.apple.com/gb/app/hilda-synthesizer/id6447191659
Website:
https://ruismaker.com

User Reviews

Users consistently praise Hilda Synthesizer for its unique, experimental sounds and hardware-like character, with a deep feature set, engaging sequencer and drone options, and strong cross-genre versatility. The listening experience is described as fun and meditative, and the developer’s proactive support with updates is repeatedly highlighted. A recurring caveat is update-related instability—presets, saving state, and some universal/app behaviors—though later firmware updates have resolved some of these issues for many users. Overall, it’s a creative, high-quality instrument when updates are smooth.
Pros
  • Encourages experimentation with unique, hard-to-reproduce sounds.
  • Powerful, feature-rich synth with a hardware-like vibe, delivering versatile sequencer and drone modes.
  • Fun and engaging to use across genres; immersive and inspiring.
  • Active, responsive developer with regular updates and improvements.
Cons
  • Update-related stability issues: broken presets and save-state problems; background/universal app behavior reported by users.
  • Some device-specific inconsistency and quality concerns after updates; although many issues are addressed by firmware updates, problems persist for a subset of users.
Recent reviews
I held back on getting Hilda because it wasn’t the kind of synth I was used to. Then I bought it, and it was true love, because it wasn’t the kind of synth I was used to, lol. Hilda will reward experimentation with sounds you’re not likely to get anywhere else!
by Ni*****, 2025-01-27

Resisted getting this for a long time, always skeptical of West Cost synthesis. Then they dropped the price and I’m glad I got it. Meditative and relaxing.
by Co*****, 2024-11-22

Tried and True Developer who cares about his customers and products enough that he even provides free luxury updates. 10/10
by Et*****, 2023-11-11
View all user reviews ›

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