Comparison

Sinusoid vs Hilda Synthesizer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read 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

About

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.

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
Read 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

Sinusoid4 screens
Hilda Synthesizer3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Sinusoid costs $4.99 and Hilda Synthesizer $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Sinusoid versus Hilda Synthesizer: the parameters behind the verdict, then further details
ParameterSinusoidHilda Synthesizer
Price$4.99 — better$12.99
Rating4.9 (13 ratings) — better4.9 (58 ratings)
Positive reviews68.8% of reviews90.0% of reviews — better
Number of ratings1358 — better
Update frequencyEvery 3 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better12
Further details — not scored
Size7 MB6 MB
Age rating4+4+
DeveloperErik SigthBram Bos

Customer experience

Sinusoid

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews32 reviews
Positive68.8%
Neutral18.8%
Negative12.5%

Hilda Synthesizer

All ratings58 ratings
Positive98.3%
Neutral0.0%
Negative1.7%
Written reviews30 reviews
Positive90.0%
Neutral0.0%
Negative10.0%

In-app purchases

None

Sinusoid

No in-app purchases

None

Hilda Synthesizer

No in-app purchases

Questions

Is Sinusoid free?
Sinusoid costs $4.99, with no in-app purchases.
Is Hilda Synthesizer free?
Hilda Synthesizer costs $12.99, with no in-app purchases.
Which has better reviews, Sinusoid or Hilda Synthesizer?
Sinusoid is rated higher. Sinusoid averages 4.9 out of 5 from 13 ratings, while Hilda Synthesizer averages 4.9 from 58 ratings.
Do Sinusoid or Hilda Synthesizer have ads?
Neither Sinusoid nor Hilda Synthesizer shows ads.
Which is updated more often, Sinusoid or Hilda Synthesizer?
Sinusoid ships an update every 3 months, and Hilda Synthesizer every 9 days. Most recently, Sinusoid was updated on October 23, 2026 and Hilda Synthesizer on October 25, 2026.

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