Comparison

Arpeggist vs Phosphor 3

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

Head to head
About

Arpeggist

This app transforms single notes or chords into complex musical patterns using a programmable step matrix editor and a unique random generator. It allows for live playing with an onscreen or hardware keyboard and includes an internal sound generator for immediate use.

Highlights
  • Programmable step matrix editor
  • Random arpeggio generator
  • Live playing with onscreen keyboard
  • Internal sound generator
  • Chord generator
  • Dozens of selectable scales
Read full description

Arpeggist is a MIDI Note arpeggiator with a very flexible step matrix editor for programming and a unique “rolling dice” random arpeggio generator. You can build arpeggios from scratch or use one of the factory arpeggios as foundation. You can also create an unlimited number of user arpeggio presets.
 Just play a chord or a single note and it gets transformed into a grooving monophonic synth line or a rhythmical chord pattern. Full featured programmable Arpeggiator • User programmable sequences with up to 32 steps. • Can trigger single notes and chords. • Unique randomizer generates Arpeggios with 100% usability. • 40 Factory arpeggios included, unlimited user arpeggios possible. • For each step you can program tie (bound notes), accent, transposition and note order • Use to control MIDI compatible Synthesiser Live • Play trigger notes live with the onscreen keyboard. • Optionally use CoreMIDI compatible hardware keyboard. • Chord generator plays complex chords on one finger playing. • Internal sound generator. • Selectable Arpeggiator MIDI Output port. • Dozens of scales selectable • Variable Keyboard layout for scale optimized playing Global • Audiobus 2 compatible (Input slot) with Preset saving. • Inter App Audio • Exchange user presets with File Sharing in iTunes. • Support for virtual MIDI input/output connections.

About

Phosphor 3

This app recreates a vintage digital synthesizer, offering a faithful emulation of a classic sound engine. It includes modern features like MPE, extensive modulation, and a new UI for sonic exploration.

Highlights
  • Vintage digital synthesizer emulation
  • Additive synthesis engine
  • MPE support
  • Extensive modulation routing
  • Preset manager
  • Tuning tables
Read full description

Glow in the dark synthesis. Phosphor 3 is a dual-oscillator additive synthesizer that puts the raw building blocks of sound at your fingertips. Draw, randomize, or select up to 64 harmonics per oscillator, then shape them with envelopes, LFOs, cross-modulation, and a flexible mod matrix. Originally inspired by the alphaSyntauri, a rare digital additive synth from the early 1980s, Phosphor 3 takes that concept far beyond its origins with modern MPE expression, polyphonic modulation, and a full effects engine. --- Additive Oscillators Two identical additive oscillators, each with up to 64 individually editable harmonics. Start from classic shapes: sawtooth, triangle, square, or draw your own harmonic spectrum directly in the partial editor. The intelligent randomizer generates musically useful timbres with variable rolloff, density, and formant peaks, so every click produces something worth exploring. Choose 16, 32, or 64 partials per oscillator to balance complexity against CPU. Each oscillator has independent level, pan, transpose, fine tune, a noise generator with lo-fi downsampling, and cross-modulation (FM) for pushing timbres into harsher, more complex territory. Modulation Two ADSR envelopes with adjustable attack, decay, and release curves. Two LFOs with four waveforms (pulse, sine, saw, random), tempo sync, and the option to run polyphonically, a separate LFO per voice, or globally. An 8-source modulation matrix routes velocity, pressure, pitch bend, mod wheel, CC 74, triggered random, and both LFOs to destinations across the oscillators and effects. Effects Stereo delay with independent left/right time, feedback, and cross-channel feedback for ping-pong and rhythmic patterns. Tempo sync locks delay times to your DAW. Dual band-pass filters after the delay let you carve the wet signal into resonant, frequency-specific textures. Expression Full MPE support with per-note pitch bend, pressure, and slide across 16 polyphonic voices. Mono legato and mono retrigger modes with adjustable portamento. Unison mode for thick, detuned stacks. A scrollable 128-key on-screen keyboard with velocity from touch position, pitch bend from horizontal drag, and channel pressure from vertical drag, no hardware controller required. Tuning MTS-ESP client support for real-time microtuning from any MTS-ESP master. TUN file import for custom scales. Standard 12-TET with adjustable A4 reference. Supports AUv3 for use in GarageBand, AUM, Cubasis, and other AUv3-compatible hosts.

Verdict

The call

The clearest difference is review sentiment: Phosphor 3 at 79% against Arpeggist's 14%. Phosphor 3 also leads on rating (4.7 vs 2.0) and ratings volume (9 vs 3). Arpeggist's advantage is update cadence (every 5 weeks vs every 11 months) and price ($2.99 vs $5.99). 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

Arpeggist costs $2.99 and Phosphor 3 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Phosphor 3 holds the better App Store score, 4.7 against 2.0. Both are backed by a comparable volume of ratings — 3 and 9 respectively. Written reviews point the same way: 14% of Arpeggist's written reviews are positive against 79% of Phosphor 3's.

UpkeepUpdate frequency

Arpeggist ships an update every 5 weeks, Phosphor 3 every 11 months. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Arpeggist versus Phosphor 3: the parameters behind the verdict, then further details
ParameterArpeggistPhosphor 3
Price$2.99 — better$5.99
Rating2.0 (3 ratings)4.7 (9 ratings) — better
Positive reviews13.6% of reviews78.6% of reviews — better
Number of ratings39 — better
Update frequencyEvery 5 weeks — betterEvery 11 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPad
Requires iOS7.0 — better12.0
Further details — not scored
Size11 MB27 MB
Age rating4+4+
DeveloperHarry GohsAudio Damage, Inc.

Customer experience

Arpeggist

All ratings3 ratings
Positive0.0%
Neutral33.3%
Negative66.7%
Written reviews22 reviews
Positive13.6%
Neutral27.3%
Negative59.1%

Phosphor 3

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews14 reviews
Positive78.6%
Neutral14.3%
Negative7.1%

In-app purchases

None

Arpeggist

No in-app purchases

None

Phosphor 3

No in-app purchases

Questions

Is Arpeggist free?
Arpeggist costs $2.99, with no in-app purchases.
Is Phosphor 3 free?
Phosphor 3 costs $5.99, with no in-app purchases.
Which has better reviews, Arpeggist or Phosphor 3?
Phosphor 3 is rated higher. Arpeggist averages 2.0 out of 5 from 3 ratings, while Phosphor 3 averages 4.7 from 9 ratings.
Do Arpeggist or Phosphor 3 have ads?
Neither Arpeggist nor Phosphor 3 shows ads.
Which is updated more often, Arpeggist or Phosphor 3?
Arpeggist ships an update every 5 weeks, and Phosphor 3 every 11 months. Most recently, Arpeggist was updated on October 11, 2026 and Phosphor 3 on October 24, 2026.

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