Sinusoid vs Hilda Synthesizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sinusoid
Create music with a retro 8-bit inspired sound machine. Features 4 channels for tones and drums, with extensive sound sculpting options like filters, modulation, and effects. Export your creations and integrate with other music apps.
- 4 sound channels (3 tones, 1 drum/noise)
- Extensive audio parameters (envelope, vibrato, glide, filter)
- Ring modulation and FM synthesis
- Arpeggiator, delay, and bit crusher effects
- MIDI input and output support
- Audiobus, IAA, and AUv3 integration
- AIFF export and in-app music player
Read full descriptionHide full description
Sinusoid is a tracker/sequencer sound machine inspired by retro 8 bit game consoles. It has 4 sound channels where 3 play tones and 1 plays drums and noise. It has audio parameters like pan, amplitude envelope, vibrato, pitch glide, a resonant filter and second oscillator for ring modulation and fm. Further sculpt the sound with an arpeggiator, delay and bit crusher. Export songs to AIFF and listen to them in the in app music player or share them with other apps. MIDI can be used to control parameters, play and input notes. MIDI out makes it possible to play other synths with sinusoid using Core MIDI, Bluetooth, IAA MIDI or AUv3 MIDI. Connect to other sound apps using Audiobus, Inter App Audio or AUv3. +++ 3 tone channels: sinusoid, square, triangle, saw, pulse (75%, 50%, 25% or 12.5%) +++ 1 drum/noise channel +++ Stereo pan +++ Amplitude envelope (attack, length and release) +++ 2nd oscillator for fm and ring modulation +++ Vibrato +++ Pitch glide +++ Resonant filter +++ Arpeggio/stutter +++ Tape delay +++ Bit/samplerate crush +++ Per note ability to override all channel audio parameters +++ Copy/paste between devices on the same network +++ Save and share projects using “open with” and files app drag’n drop +++ Export to songs to AIFF +++ Core MIDI, Bluetooth, IAA MIDI, AUv3 MIDI +++ Audiobus, IAA and AUv3
Hilda Synthesizer
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.
- 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
Read full descriptionHide full description
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
Screenshots
Verdict
The clearest difference is price: Sinusoid at $4.99 against Hilda Synthesizer's $12.99. Sinusoid also leads on iOS requirement (9.0 vs 12). Hilda Synthesizer's advantage is update cadence (every 9 days vs every 3 months) and review sentiment (90% vs 69%). On rating, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Sinusoid costs $4.99 and Hilda Synthesizer $12.99 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 Sinusoid against 4.9 for Hilda Synthesizer. Both are backed by a comparable volume of ratings — 13 and 58 respectively. Written reviews are what separate them: 69% of Sinusoid's written reviews are positive against 90% of Hilda Synthesizer's.
Sinusoid ships an update every 3 months, Hilda Synthesizer every 9 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.
| Parameter | Sinusoid | Hilda Synthesizer |
|---|---|---|
| Price | $4.99 — better | $12.99 |
| Rating | 4.9 (13 ratings) — better | 4.9 (58 ratings) |
| Positive reviews | 68.8% of reviews | 90.0% of reviews — better |
| Number of ratings | 13 | 58 — better |
| Update frequency | Every 3 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12 |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Sigth | Bram Bos |
Customer experience
Sinusoid
Hilda Synthesizer
In-app purchases
Sinusoid
No in-app purchases
Hilda Synthesizer
No in-app purchases
Questions
Is Sinusoid free?
Is Hilda Synthesizer free?
Which has better reviews, Sinusoid or Hilda Synthesizer?
Do Sinusoid or Hilda Synthesizer have ads?
Which is updated more often, Sinusoid or Hilda Synthesizer?
Other comparisons















