shapesynth vs Alien Box
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
shapesynth
Create unique retro-inspired sounds by drawing oscillator waveforms. This polyphonic synthesizer offers extensive modulation options, built-in effects, and recording capabilities. Seamlessly integrate with other music apps and hardware for a versatile creative experience.
- Draw custom oscillator waveforms
- 16-voice polyphony
- Arpeggiator and stereo delay
- Resonant filter
- Parameter modulation via keyboard, MPE, accelerometer
- Tape recorder with infinite overdubs
- Inter-app audio and AUv3 support
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Shape is a polyphonic synthesiser allowing the user to draw the shape of the oscillator waveform. The first half of the oscillator is represented by 32 blocks and the second half is its mirror, generating all sorts of possible raw retroish sounds. 16 pages per oscillator allows to interpolate between different shapes. Add effects like arpeggio, stereo delay and a resonant filter and record your sounds on a classic tape. Modulate any parameter with keyboard, MIDI MPE or the device accelerometer. Connect to other apps with AudioBus, IAA, AUv3 and midi. +++ 16 voice polyphony +++ 2 oscillators, draw your own shape +++ 3 oscillator mixing functions (add, subtract or multiply) +++ Lfo modulation with ADSR: envelope, pitch, duty cycle, square, page or filter +++ Record on tape with infinite overdubs (save, load, import, export) +++ Arpeggiator +++ Stereo delay +++ Resonant filter (low, band and high pass) +++ Modulate any parameter using keyboard, MIDI MPE or accelerometer (Built in or Sphero) +++ Mini linear sequencer with euclidean rhythm +++ On screen 25 key stylophone style keyboard +++ AudioBus, Inter App Audio and AUv3 +++ Ableton link or AUv3 host sync +++ CoreMIDI, IAA MIDI, Bluetooth MIDI, limited MPE and MIDI out +++ Audio Paste, files app drag’n drop or open with
Alien Box
This audio effect plugin creates a unique sound with increased sustain and gentle, LFO-modulated vibes. It functions as an AUv3 effect for hosts like GarageBand or as a standalone app for real-time audio input processing.
- Unique sound enrichment
- LFO modulated vibes
- Complex resonator system
- AUv3 plugin for hosts
- Standalone app mode
- Gain, Vibe, Depth, Reverb controls
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Alien Box is a completely new kind of audio effect that you have never heard before. It makes the sound big and slightly increases the sustain while adding gentle vibes to it. The vibes are LFO modulated and the effect is using very complex resonator system inside. It is modulation effect and you can compare it to flanger, phaser or chorus but it is not like any of them… The app is an Audio Unit Effect AUV3 and can be used inside GarageBand or other AU host apps as an effect plug-in. Alien Box can also run as a stand alone app adding effect to the audio input so you can play your guitar, bass or synth directly three the app if you have the connector to do so. Alien Box controls: - Gain - you can use it increase the gain and sustain - Vibe - main tone and background vibes balance - Depth - controls the modulations depth - Reverb - adds reverb to the background vibes
Screenshots
Verdict
The clearest difference is review sentiment: shapesynth at 65% against Alien Box's 0%. shapesynth also leads on rating (4.9 vs 1.3) and update cadence (every 2 months vs every 38 months). Alien Box's advantage is price ($2.99 vs $4.99). 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
shapesynth costs $4.99 and Alien Box $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
shapesynth holds the better App Store score, 4.9 against 1.3. That said, the two scores are not equally well evidenced: shapesynth has 24 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 65% of shapesynth's written reviews are positive against 0% of Alien Box's.
shapesynth ships an update every 2 months, Alien Box every 38 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.
| Parameter | shapesynth | Alien Box |
|---|---|---|
| Price | $4.99 | $2.99 — better |
| Rating | 4.9 (24 ratings) — better | 1.3 (3 ratings) |
| Positive reviews | 65.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 24 — better | 3 |
| Update frequency | Every 2 months — better | Every 38 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 10.0 |
| Further details — not scored | ||
| Size | 8 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Sigth | Aleksandar Mlazev |
Customer experience
shapesynth
Alien Box
In-app purchases
shapesynth
No in-app purchases
Alien Box
No in-app purchases









