Comparison

ARIA ONE vs GRAB EM Field Synth

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

Head to head
About

ARIA ONE

Features
Read full description

ARIA ONE is a sound personalization app built from your unique hearing profile. Take the FullScale hearing test — a full-spectrum assessment mapping up to 37 frequencies per ear. Choose Instant, Quick Results, or Full Accuracy pathways. Complete a profile in as little as 8 minutes. Your hearing profile directly powers correction, limiter behavior, presets, and your personalized listening workflow. Three macro controls — Drive, Intensity, and Smoothing — shape the character of your sound. Three mood presets — Calm, Natural, and Intense — switch your full DSP state with a single tap. Play your own music library through your personalized DSP chain with the built-in audio player. ARIA AI gives you access to the full parameter space without touching a single knob. Describe what you want — "make the bass warmer," "tighten the transients," "reduce harshness" — and the AI adjusts one or many parameters at once across correction, dynamics, drive, and limiting. Choose Standard, Fine Tune, or Thinking agents depending on how broad or surgical you want the changes. Keep refining over time instead of learning the parameter space yourself. Presets, hearing profiles, and mood assignments sync across your devices. Use the Advanced View on Mac or Windows to fine-tune your sound with 400+ parameters, then push your presets and moods directly to your phone. Check out a mobile device remotely, dial in its settings from the full desktop interface, and commit changes back. On desktop, ARIA ONE is available as a standalone app and VST3/AUv3 plugin with eight graphing windows and ITU-R BS.1770 loudness metering. Part of the Altitude personalization ecosystem: FullScale, ARIA Studio, Absolute Zero, and Crossfeed. FEATURES Hearing Test • FullScale hearing test — full-spectrum, 125 Hz to 20 kHz • Up to 37 frequencies per ear • Three pathways: Full Accuracy, Quick Results, Instant • Demographic-based average profiles for instant demo • Test history and result export Sound Personalization • High-resolution hearing correction from FIR filters • Adaptive multi-stage lookahead limiting • Four limiter algorithms • Dual-pass dynamics processing • Input adaptive gain normalization Controls • Three macro sliders with curve-to-parameter mapping • Two macro toggle switches • Mood presets: Calm, Natural, Intense • One-tap mood switching with full DSP state swap • Bypass toggle and Crossfeed toggle Audio Player • Built-in player with playlist management • Library browser with import and song actions • Playback queue with drag reorder • Saved playlists with create, rename, sort • Now Playing strip with transport, seek, repeat, shuffle • Dual-source playback: internal player or system audio AI Personalization • Natural language control over the full parameter space • Adjusts correction, dynamics, drive, macros, and limiting • Four AI agents: Standard, Fine Tune, Thinking, Legacy • Device-specific AI-generated live presets • Iterative refinement — keep shaping your sound over time Sync & Devices • Cloud sync for profiles, presets, and mood assignments • Per-device mood preset management • Remote device checkout and commit • Copy and paste moods between devices • Cross-product sync with Absolute Zero • One-way export to ARIA Studio Preset System • Meta, Full, Limiter, EQ, Macro, and Adaptive Input presets • Factory and user preset libraries • Preset browser with category navigation Desktop Advanced View (Mac & Windows) • 400+ DSP parameters • EQ correction curves with multiband EQ overlay • Stereo processing: Mid/Side, LR, width, crossfeed • Macro assignment panel with curve editor • Eight standalone graphing windows • Vectorscope, Polar Sample, Polar Level, FFT, Waveform • ITU-R BS.1770 loudness metering • VST3 and AUv3 plugin formats Onboarding • Guided seven-phase setup flow • Audio verification and volume calibration • AI-assisted demonstration Localization • English, German, Spanish, French, Japanese, Portuguese, Russian

About

GRAB EM Field Synth

This experimental synthesizer uses your iPhone's magnetic sensor to capture ambient electromagnetic waves and transform them into sound. Explore unique soundscapes by "playing" the electromagnetic noise from everyday electronics like power adapters and Wi-Fi routers.

Highlights
  • Electromagnetic wave to sound conversion
  • Multi-layered sound engine
  • Sensor-linked synth voices
  • Camera-driven tremolo effect
  • Bitcrush, comb filter, reverb, stutter effects
  • Ableton Link tempo synchronization
  • 3D point cloud frequency spectrum visualization
Features
Read full description

GRAB uses the magnetometer in your iPhone as an antenna. It receives the electromagnetic noise around you and turns it into sound in real time. Power adapters, motors, displays, Wi-Fi routers — the invisible field they radiate becomes the source material, and you play it the way you would play a field recording. Move to a different room and the instrument sounds different. SOUND ENGINE • Five ETHER-inspired layers: mains hum / PWM buzz / static hiss / high squeal / pulse train • Three sensor-driven synth voices: saw / square / noise • With the camera on, light falling on the lens drives a tremolo across level and timbre EFFECTS • CRUSH — bit crusher with sample-rate reduction • COMB — comb filter with feedback • REVERB — multi-tap reverb with shimmer • STUTTER — BPM-synced gate • MUTE — momentary kill switch; tap it repeatedly to articulate a tremolo by hand • HOLD latch on every effect pad, from the button or a second finger ABLETON LINK • Automatic tempo sync with Live, Logic and other iOS music apps • STUTTER locks to the Link tempo at 1/4, 1/8, 1/16 and 1/32 • Uses Ableton's official Link settings panel • Plays alongside other audio apps rather than interrupting them VISUALS • 3D point-cloud frequency spectrum • Spectrum bar mode • With the camera on, a grayscale image sits behind the field in depth WAYS TO PLAY • A field-sound tool: walk it past appliances and hear the timbre shift • An atmospheric noise source to drop into a live set • A platform for experimenting with electromagnetic noise music PRIVACY All audio is processed on the device. Nothing is recorded and nothing is sent anywhere. Ableton Link communicates only within your local Wi-Fi network.

Screenshots

ARIA ONE4 screens
GRAB EM Field Synth4 screens

Verdict

The call

The clearest difference is price: ARIA ONE at Free against GRAB EM Field Synth's $3.99. ARIA ONE also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). GRAB EM Field Synth's advantage is in-app purchases (none vs 1) and update cadence (daily vs every 8 days). On ads there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

ARIA ONE is free to download; GRAB EM Field Synth costs $3.99 up front. ARIA ONE sells 1 one-off in-app purchase. GRAB EM Field Synth asks for nothing beyond the download.

UpkeepUpdate frequency

ARIA ONE ships an update every 8 days, GRAB EM Field Synth daily. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

Scorecard5 real differences Ā· 3 level
ARIA ONE versus GRAB EM Field Synth: the parameters behind the verdict, then further details
ParameterARIA ONEGRAB EM Field Synth
PriceFree — better$3.99
Positive reviews—100.0% of reviews
Update frequencyEvery 8 daysDaily — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size419 MB2 MB
Age rating12+4+
DeveloperAltitude AudioHiroya Tanaka

In-app purchases

1 purchases

ARIA ONE

One-time1
  • ARIA AI Credits — 20 Pack$19.99
None

GRAB EM Field Synth

No in-app purchases

Questions

Is ARIA ONE free?
ARIA ONE is free to download, with in-app purchases available.
Is GRAB EM Field Synth free?
GRAB EM Field Synth costs $3.99, with no in-app purchases.
Do ARIA ONE or GRAB EM Field Synth have ads?
Neither ARIA ONE nor GRAB EM Field Synth shows ads.
Which is updated more often, ARIA ONE or GRAB EM Field Synth?
ARIA ONE ships an update every 8 days, and GRAB EM Field Synth daily. Most recently, ARIA ONE was updated on October 6, 2026 and GRAB EM Field Synth on October 11, 2026.

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