frekvens vs Phosphor 3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
frekvens
This app offers a unique frequency shifter and stereo delay effect. It utilizes single sideband modulation and an infinite impulse response filter for advanced audio manipulation. Additional features include high/low pass filters and an LFO for delay modulation.
- Frequency shifter
- Stereo delay
- High and low pass filter
- LFO for delay modulation
- Core MIDI CC input
- Audiobus and Inter-App Audio support
- Audio Unit extension
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Frekvens is a frequency shifter and delay effect. Unlike a pitch shifter all frequencies are shifted linearly and then fed back into itself using the stereo delay unit. The frequency shifting is achieved with single sideband modulation using a hilbert transform and an infinite impulse response filter for fast computations. Frekvens also comes with a high and low pass filter and a lfo for modulating the delay play head. - frequency shifter - high, low pass filter - stereo delay - core midi cc input - audiobus - inter app audio - audio unit extension - save, load
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.
- Vintage digital synthesizer emulation
- Additive synthesis engine
- MPE support
- Extensive modulation routing
- Preset manager
- Tuning tables
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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.
Screenshots
Verdict
The clearest difference is update cadence: frekvens at every 2 months against Phosphor 3's every 11 months. frekvens also leads on price ($2.99 vs $5.99) and device support (3 vs 1). On rating, review sentiment, ratings volume and ads 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
frekvens costs $2.99 and Phosphor 3 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.8 for frekvens against 4.7 for Phosphor 3. Both are backed by a comparable volume of ratings — 21 and 9 respectively. Written reviews are what separate them: 83% of frekvens's written reviews are positive against 79% of Phosphor 3's.
frekvens ships an update every 2 months, Phosphor 3 every 11 months. The most recent releases landed on September 25, 2026 and July 6, 2026 respectively.
| Parameter | frekvens | Phosphor 3 |
|---|---|---|
| Price | $2.99 — better | $5.99 |
| Rating | 4.8 (21 ratings) — better | 4.7 (9 ratings) |
| Positive reviews | 83.3% of reviews — better | 78.6% of reviews |
| Number of ratings | 21 — better | 9 |
| Update frequency | Every 2 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 3 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Sigth | Audio Damage, Inc. |
Customer experience
frekvens
Phosphor 3
In-app purchases
frekvens
No in-app purchases
Phosphor 3
No in-app purchases









