Fundamental2 vs ChaosArp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fundamental2
Explore the origins of electronic music with this sound synthesis software. It recreates a vintage vacuum tube oscillator with advanced modulation and morphing capabilities. Ideal for live electronics, media composition, or exploring early electronic music history.
- Vintage vacuum tube oscillator recreation
- Complex modulation possibilities
- Stochastic parameter distribution
- Morphing engine between scenes
- Real-time tuning scale transitions
- Morse code simulator LFO
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Fundamental is a sound synthesis software combining the different roots of electronic music history. Its wave engine is a faithful sonic recreation of a vintage Rohde&Schwartz vacuum tube oscillator ( having been widely used at WDR by Stockhausen ) Thanks to sonicLAB audio engine design, Fundamental leaves behind the limitations of the original device by proposing complex modulation possibilities, stochastic distributions addressing the sonic parameters like frequency , gain, stereo panning etc. in continuum, which has not been applicable until now. The Fundamental software presents you 8 instances of this vintage sine wave generator with all the artifacts and richness of a vintage equipment. That combination is we believe something you should experience. Direct Link for manual : https://www.sonic-lab.com/Fundamental/Fundamental2iOS_manual.pdf Fundamental2 brings following new features to the Fundamental1, basically now you can create organic, endless moving textures. (for iOS standalone and AUv3 ) - Ring Modulator, 7 individual modulator oscillators and one carrier oscillator. - A morphing engine which lets you gradually morph between four instances of Fundamental scenes. Also a stochastic manipulation on the 2D morphing panel is possible. - True real time gradual transition between tuning scales. - Rotary Encoder midi controller mapping for high resolution oscillator frequency and gain control with midi hardware. - One can send midi note-on messages to each Fundamental oscillator on discrete midi channels. - A morse code simulator is available on each GEN (sonicLAB LFO design ) which can create custom morse signals to modulate the relevant GEN outputs. - new envelope type "Ernd". Whether you play live electronics, compose for media or just insterested in early electronic music, Fundamental2 is a strong tool. Some of the main features of Fundamental1: ( iOS standalone and AUv3 ) - unique polymorphing wavetable synthesis without any compromise in data content and precision. - 4 dynamic wavetables being rendered for each voice to represent infinitesimal steps of frequency and gain combinations between 1HZ – 3800Hz of the original vacuum tube oscillator. - 8 simultaneous voices each with custom freq, gain, boost, panning and modulation settings. - Custom or harmonic frequency distribution of voices with variable spread ratio and tuning table. - 4 independent stochastic modulations for each voice (32 in total) addressing all parameters with various continuous, discrete distributions and also standard waveforms. - Full MPE support with various configuration possibilites. - Independent Attack / Release envelopes for each voice with various modes, AR times can be set to degrees of randomness. - Vintage oscillator or pure sine wave mode. Recommended iPAD model : A12 processor or higher. Due to screen size challenges, iPAD Mini models are not recommended.
ChaosArp
This music app generates complex and dynamic MIDI patterns using advanced algorithms. It offers a unique rhythm event feature and variance control for extensive customization, allowing users to create evolving musical sequences.
- Arpeggiator and step sequencer modes
- Rhythm event feature with 13 algorithms
- Pitch and rhythm variance control
- Scale quantizer
- Randomizable velocity and duration
- 4 performance buttons
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Introducing ChaosArp, the next-level MIDI arpeggiator/step sequencer designed to transform your musical ideas into intricate, dynamic patterns with a unique twist. ChaosArp is not just any arpeggiator; it's a powerhouse tool that uses the same advanced algorithms as LoAdKer to modulate pitch, rhythm, velocity, and duration, creating evolving, complex but high musical patterns that breathe life into your music. Dive into the heart of your creativity with ChaosArp's innovative ‘rhythm event’ feature, which allows you to explore a variety of rhythmic modifications. From repeaters to stretchers and rests for extra space and emphasis—ChaosArp has it all. Each one of these rhythm events can be assigned to any of the 6 available slots, offering limitless possibilities. Fine-tune your sonic exploration with the innovative ‘variance’ control - which goes one step beyond the simple ‘probability’ control that most arpeggiators have. Adjusting this setting for either pitch or rhythm (or both) will vary the character of the generated sequences, from fairly minimalistic to completely chaotic, thus opening up a world of endless variations. Elevate your music production today with ChaosArp and unleash patterns that inspire! Features: - Two modes: arpeggiator and stepper - 1-16 steps - Scale quantizer, never miss a note again! - Variable rate, from 1/128 to 4 beats - 3 arpeggiator modes (up, down, up/down) - 3 stepper modes (forward, backward, ping-pong) - 1 to 4 octaves range - Latch mode - Pitch randomizer with probability and variance control and random octave - Rhythm event selector with probability and variance control - 6 assignable rhythm event slots - 13 rhythm event algorithms, including repeaters, stretchers, and rests - Repeat, stretch, and repeat rest probability controls for further customization of the rhythm event algorithms - Randomizable velocity and duration with variable range - 4 performance buttons that temporarily override the probabilities of pitch, rhythm, velocity, and duration - Automatable parameters
Screenshots
Verdict
The clearest difference is price: ChaosArp at $3.99 against Fundamental2's $34.99. ChaosArp also leads on review sentiment (83% vs 57%) and rating (4.9 vs 4.7). On ratings volume, update cadence, ads and in-app purchases 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
Fundamental2 costs $34.99 and ChaosArp $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ChaosArp holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 6 and 9 respectively. Written reviews point the same way: 57% of Fundamental2's written reviews are positive against 83% of ChaosArp's.
Fundamental2 ships an update every 4 weeks, ChaosArp every 2 weeks. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.
| Parameter | Fundamental2 | ChaosArp |
|---|---|---|
| Price | $34.99 | $3.99 — better |
| Rating | 4.7 (6 ratings) | 4.9 (9 ratings) — better |
| Positive reviews | 57.1% of reviews | 83.3% of reviews — better |
| Number of ratings | 6 | 9 — better |
| Update frequency | Every 4 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #183 — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12 — better | 13.0 |
| Further details — not scored | ||
| Size | 59 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | SonicPlanet Audio Video Teknolojileri Anonim Sti. | Achillefs Sourlas |
Customer experience
Fundamental2
ChaosArp
In-app purchases
Fundamental2
No in-app purchases
ChaosArp
No in-app purchases









