Comparison

S vs P422 Fairuz

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

Head to head
About

S

This semi-modular synthesizer app for iPad offers a hands-on sound design experience with a single-screen interface for intuitive patching. It delivers a warm, vintage sound inspired by 1970s synthesizers, featuring dual oscillators, resonant filters, and multiple modulation sources.

Highlights
  • Single-screen interface
  • Fast, hands-on patching
  • Vintage 1970s synth sound
  • Dual oscillators
  • Resonant ladder filter
  • Multiple modulation sources
Features
Read full description

S-Modular is a semi-modular synthesiser for iPad, designed for fast, hands-on patching without clutter. Everything is presented on a single screen, making sound design immediate and intuitive. Simply drag from one jack to another to create connections. S-Modular delivers a distinctive vintage sound inspired by classic 1970s synthesis — warm, rich, and full of character. Features Dual oscillators 24 dB/oct ladder filter Resonant high-pass and low-pass filters Two LFOs Four-step CV sequencer Four-track mixer Audio and CV splitter Two AHR envelope generators Delay effect

About

P422 Fairuz

This app offers a powerful four-band parametric equalizer with selectable curves and proportional Q for precise sound shaping. It emulates classic op-amp circuits, adding harmonic density and character, with features like a sub-bass circuit and input transformer control.

Highlights
  • Four op-amp EQ bands with Bell/Contour/Contour X2 shapes
  • Proportional Q for musical width
  • TREMOR sub-bass circuit
  • VOICE input transformer and HAMMER output stage saturation
  • Real-time spectrum analyzer
  • AUv3 plugin and standalone app
Features
Read full description

P422 Fairuz is a four-band op-amp parametric EQ that moves past hardware — the punch and harmonic density of classic op-amp circuits, with capabilities the originals never had. Shape your sound with HIGH, HI-MID, LO-MID and LOW bands, each with three selectable curves (Bell, Contour, Contour X2) and proportional Q: wide stays wide, narrow finds itself. LO and HI shelves with complementary dip behavior, switchable HPF/LPF, and the TREMOR circuit laying a sub-bass foundation below 30 Hz. Character comes from the circuit, not just the curve: OUT drives the op-amp output stage, VOICE adds drive on top of it, and HAMMER adds the output transformer after it, for body, density and saturation — op-amp color available even with the EQ bands off. Blend it all in parallel with the MIX control, no DAW routing needed. FEATURES - Four op-amp EQ bands with Bell / Contour / Contour X2 shapes - Proportional Q — musical at any width - Stepped or continuous frequency modes - LO / HI shelves with complementary dip - TREMOR sub-bass circuit below 30 Hz - Switchable HPF / LPF with position options - Op-amp output stage: OUT drive, VOICE drive and the HAMMER output transformer - MIX parallel blend and Dual Mono L/R behavior - Spectrum visualizer: drag the band dots, tap one for its card; IN/OUT analyzer with freeze, range, resolution, speed and tilt - A/B states and 276 factory presets with notes, tags, search and favorites - Out & Trim linked gain staging - Zero latency, optional oversampling FORMATS - AUv3 plug-in for AUM, Logic Pro, GarageBand, Cubasis and other AUv3 hosts - Standalone app with mic/interface input Bring console-grade op-amp tone to your iPad and iPhone.

Screenshots

S2 screens
P422 Fairuz3 screens

Verdict

The call

The clearest difference is review sentiment: P422 Fairuz at 100% against S's 31%. P422 Fairuz also leads on rating (5.0 vs 2.6) and update cadence (monthly vs every 7 months). S's advantage is price ($2.99 vs $19.99) and ratings volume (11 vs 1). On ads, in-app purchases, monetization model and device support 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

S costs $2.99 and P422 Fairuz $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

P422 Fairuz holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: S has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 31% of S's written reviews are positive against 100% of P422 Fairuz's.

UpkeepUpdate frequency

S ships an update every 7 months, P422 Fairuz monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 5 level
S versus P422 Fairuz: the parameters behind the verdict, then further details
ParameterSP422 Fairuz
Price$2.99 — better$19.99
Rating2.6 (11 ratings)5.0 (1 ratings) — better
Positive reviews31.3% of reviews100.0% of reviews — better
Number of ratings11 — better1
Update frequencyEvery 7 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size7 MB46 MB
Age rating4+4+
DeveloperPaul BetowskiPulsar Modular

Customer experience

S

All ratings11 ratings
Positive27.3%
Neutral27.3%
Negative45.5%
Written reviews16 reviews
Positive31.3%
Neutral25.0%
Negative43.8%

P422 Fairuz

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

S

No in-app purchases

None

P422 Fairuz

No in-app purchases

Questions

Is S free?
S costs $2.99, with no in-app purchases.
Is P422 Fairuz free?
P422 Fairuz costs $19.99, with no in-app purchases.
Which has better reviews, S or P422 Fairuz?
P422 Fairuz is rated higher. S averages 2.6 out of 5 from 11 ratings, while P422 Fairuz averages 5.0 from 1 ratings.
Do S or P422 Fairuz have ads?
Neither S nor P422 Fairuz shows ads.
Which is updated more often, S or P422 Fairuz?
S ships an update every 7 months, and P422 Fairuz monthly. Most recently, S was updated on October 24, 2026 and P422 Fairuz on October 25, 2026.

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