Quantum Sequencer vs G.UITAR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quantum Sequencer
This app offers an interactive approach to music composition, focusing on detailed steps that can be arranged into looping sequences. It provides extensive control over note parameters and allows for real-time manipulation and experimentation.
- Interactive step-focused composition
- Detailed step notation (probability, ornamentation)
- Configurable sequence lengths and sub-sequences
- 16 general faders for parameter editing
- MIDI learnable faders
- Programmable loop actions
- Per-sequence MIDI FX, devices, and controllers
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Quantum is a performance midi sequencer which approaches music composition with an interactive creation processes - sometimes referred to as 'noodling'. Where pattern or piano-role sequencers are good for music forms (intro/verse/chorus etc) or grid entry, Quantum's approach is built around the idea of a step being the focus - think of the step as a single note or chord written on a music sheet then add a lot of extra notation (like probability of playing or ornamentation say). These highly detailed steps are then aligned into sequences (think melodies) that loop. You can have any length up to 64, but these can be further split into 4 sub-sequences that have their own set of sequencer parameters (like tempo, play direction, transpose etc). To enter step parameters such as note pitch, velocity, gated length etc, 16 general faders are available which allow you to draw, drag, select copy/paste, inc/dec & link together to edit values. These are also midi learnable (midi cc or nrpn) to allow you to use control surfaces or midi controllers. To aid you with faster control Quantum has loop actions which you can program in to carry out tasks when a sequence loops - e.g. transpose, randomise, start or load another sequence etc. With up to 24 sequences playing Quantum introduces a mixer page allowing you to blend midi velocities. Built on the MidiSequencer engine, midi FX, devices & Controllers are now possible per sequence. So why would Quantum be good for your setup? There are many midi enabled IOS & hardware synths that produce exotic timbres if you send them fast & varied midi controls that you just would not hear with keyboard playing or slow tempo tunes. Also, Quantum, embraces experimentation in melody creation and by copy/pasting allowing quick setup of arpeggios & counterpoint tunes that you can create & manipulate on the fly! note : This app sends midi information - you need to use it in conjunction with any midi enabled iOS synth app (e.g. Sunrizer) to hear sounds
G.UITAR
Experience the charm of 80s digital guitars on your smartphone. This app offers customizable sounds, versatile playing modes, and smart chord recognition to help you create unique music.
- Six unique guitar sounds
- Pluck and tap playing modes
- Mute individual strings
- Built-in transpose and auto-tuning
- Smart chord recognition engine
- Dynamic fretboard scaling
- Adjustable fret count (3, 4, or 5)
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G.UITAR – Your Retro Digital Guitar Companion G.UITAR brings the charm of 80s digital guitars straight to your smartphone, reimagined for modern creativity. Whether you're exploring new chord shapes or adding a vintage twist to your sound, G.UITAR offers an expressive, customizable experience for players and producers alike. Choose from six unique guitar sounds and switch effortlessly between pluck and tap modes to match your playing style. Mute individual strings for more percussive textures or open tunings—perfect for crafting original voicings. With built-in transpose and auto-tuning systems, switching keys or tunings takes just a tap. G.UITAR also includes a smart chord recognition engine to help you visualize and learn new shapes in real time—ideal for students, creators, or curious hands. Adjust the fretboard layout with dynamic scaling options to fit any screen or hand size, and select between 3, 4, or 5 frets for new chordal possibilities. Coming soon: MIDI out, theme customization, and AUv3 support—because your digital guitar should evolve with your music.
Screenshots
Verdict
The clearest difference is review sentiment: Quantum Sequencer at 69% against G.UITAR's 0%. Quantum Sequencer also leads on rating (4.6 vs 4.0) and ratings volume (35 vs 2). G.UITAR's advantage is price ($4.99 vs $7.99). On ads, in-app purchases and monetization model 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
Quantum Sequencer costs $7.99 and G.UITAR $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Quantum Sequencer holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Quantum Sequencer has 35 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 69% of Quantum Sequencer's written reviews are positive against 0% of G.UITAR's.
| Parameter | Quantum Sequencer | G.UITAR |
|---|---|---|
| Price | $7.99 | $4.99 — better |
| Rating | 4.6 (35 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 68.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 35 — better | 2 |
| Update frequency | Every 6 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 191 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | anthony saunders | Paolo Giorgi |
Customer experience
Quantum Sequencer
G.UITAR
In-app purchases
Quantum Sequencer
No in-app purchases
G.UITAR
No in-app purchases









