NoiseFace vs PX1 FM Synth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NoiseFace
Discover, mix, and visualize various noise colors with an adorable animated character. Adjust individual noise levels, save custom mixes, and enjoy a unique visual representation of sound. Perfect for focus, sleep, and relaxation.
- 12 Noise Colors
- Visual Waveforms
- Individual Control
- Save Presets
- Adorable Character
- Drag to Delete Presets
- Modulation Mode
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Meet NoiseFace - the cutest way to discover, mix, and visualize noise! NoiseFace brings noise generation to life with an adorable animated character whose mouth moves to show you exactly what each noise sounds like. Watch as different waveforms dance across the screen while you create your perfect sound environment. KEY FEATURES: 12 Noise Colors Mix and match from white, pink, brown, blue, violet, gray, black, green, orange, yellow, turquoise, and red noise - each with its own unique sound character and visual waveform. Visual Waveforms See your sounds! The character's expressive mouth displays real-time animated waveforms so you can actually see the difference between each noise type. Individual Control Adjust the brightness (filter frequency) of each noise independently, or control them all together. Fine-tune your perfect sound mix. Save Presets Found the perfect combination? Save it as a preset! Store up to 12 different mixes and switch between them instantly. Adorable Character Your noise companion blinks, shows emotions, and even falls asleep after extended play sessions. Tap the face to clear sounds or toggle between your presets. Drag to Delete Long-press any preset to drag it to the trash. Simple, intuitive preset management. Universal App Beautifully designed for both iPhone and iPad with optimized layouts for each device. Modulate Hold the small white button above the slider and activate modulation mode where the slider moves on its own and controls all sounds. PERFECT FOR: • Focus and concentration • Sleep and relaxation • Meditation • Blocking distractions • Studying • Creative work • Sound therapy • Tinnitus relief Each noise color has unique properties: - White Noise: Equal intensity across all frequencies - Pink Noise: Balanced, natural sound (rain-like) - Brown Noise: Deep, rumbling bass tones - Blue Noise: Higher frequencies, crisp and bright - Violet Noise: Even higher frequencies - Gray Noise: Psychoacoustically flat - And more specialty colors for every preference! Download NoiseFace today and discover your perfect sound mix with the cutest noise generator ever created!
PX1 FM Synth
Create rich, wide stereo sounds with a dual-engine FM synthesizer. Explore classic 1980s digital synth tones, from electric pianos to metallic bells, with extensive operator and envelope controls. It functions as a standalone app or an AUv3 plugin for music production.
- Dual independent 6-operator FM engines
- 32 classic FM algorithms
- Per-operator envelopes and pan
- Five macro knobs for sound shaping
- Built-in reverb
- AUv3 plugin support
- Random patch generator
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PX1 is a dual-engine FM synthesizer inspired by the classic 6-operator digital synths of the 1980s. Each engine features six operators, 32 algorithms, and full envelope control — giving you everything from glassy electric pianos and punchy basses to evolving pads and metallic bells. What makes PX1 special is the dual-engine architecture. Two completely independent FM voices run side by side. Copy one engine to the other, make subtle changes, then use the Spread control to place them across the stereo field. The result is a lush, wide sound that a single FM engine simply cannot produce. FEATURES • Two independent 6-operator FM engines • 32 classic FM algorithms • Per-operator envelopes (4 rates + 4 levels) • Per-operator pan for detailed stereo placement • Five macro knobs — Brightness, Touch, Attack, Decay, Spread • Copy/Paste between engines for instant layering • Random patch generator exploring the classic FM sound palette • Built-in reverb (Size, Damp, Amount) • Mono, Legato, and Portamento modes • LFO with triangle, saw, square, and random waveforms • Pitch bend range and transpose controls • Key velocity sensitivity per operator • Keyboard rate scaling and level scaling • Operator Key Sync on/off for consistent or organic attacks AUv3 PLUGIN PX1 works as a standalone instrument and as an Audio Unit v3 plugin. Load it directly inside GarageBand, Logic Pro, AUM, Cubasis, or any AUv3-compatible host. Full parameter automation is supported — record knob movements in your DAW and play them back. DESIGNED FOR MUSICIANS The interface stays close to the original FM programming model that experienced synthesists know, while macro controls make it approachable for anyone. Turn one knob and shape the entire sound; dive into individual operators when you want surgical control. LISTEN TO EXAMPLES Hear PX1 in action — sound demos are available at: https://soundcloud.com/peter-sj-gren/sets/px1-demo Requires no in-app purchases. No subscriptions. No ads. No tracking.
Screenshots
Verdict
The clearest difference is rating: PX1 FM Synth at 5.0 against NoiseFace's 4.6. NoiseFace's advantage is price ($4.99 vs $7.99) and ratings volume (9 vs 2). 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
NoiseFace costs $4.99 and PX1 FM Synth $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PX1 FM Synth holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 9 and 2 respectively.
| Parameter | NoiseFace | PX1 FM Synth |
|---|---|---|
| Price | $4.99 — better | $7.99 |
| Rating | 4.6 (9 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 9 — better | 2 |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 2 MB | 121 MB |
| Age rating | 4+ | 4+ |
| Developer | Johanna Quiceno | Peter Sjogren |
Customer experience
NoiseFace
PX1 FM Synth
In-app purchases
NoiseFace
No in-app purchases
PX1 FM Synth
No in-app purchases









