spool. vs AmpGate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
spool.
Create full songs on your phone with this pocket music studio. It offers a variety of sound engines, sampling capabilities, step sequencing, and a 4-track tape recorder for recording and mixing your music. Effects and MIDI controller support enhance the creative process.
- Multiple sound engines
- Sampling and sequencing
- 4-track tape recording
- Extensive effects rack
- MIDI controller support
- Step sequencer
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Make a whole song on your phone. Spool is a pocket music studio inspired by the joy of hardware grooveboxes — play, sample, sequence, and record to tape, all in one playful instrument. Fourteen sound engines. From punchy FM and fat subtractive Pulse to shimmering Cluster, plucked String, granular Cloud, the TALK vocoder, the WIDE stereo engine, THUMP bass, a Sampler, and two drum machines — each with its own animated, touchable visualizer and four hands-on controls. Sample anything. Record straight from the mic into the sampler or drum kits, trim it, and play it across the keyboard. Drums & beats. Build kits, chop a sample into a playable kit, and lock in grooves with the step sequencer. Playful sequencers. Pattern and arpeggiator to start; unlock Stream, Taps, and the bouncing-ball Gumball machine for happy accidents. Six minutes of 4-track tape. Record, overdub, varispeed (including reverse), scrub, and bounce your jam to a finished mixdown — export to WAV. Your tape is saved with your project. Effects & mixer. A deep rack — delay, spring reverb, drive, compressor, chorus, multimode filter, phaser, tremolo/auto-pan, beat-repeat stutter, and a pitch-shifter/harmonizer — many tempo-syncable. Plus a master EQ and brickwall limiter so it always sounds finished. Plays with your gear. Connect a USB or Bluetooth MIDI controller and play Spool like hardware. AUv3 plugin support is planned for a future update. Free to download and make music with a starter set of engines and sequencers. A single one-time Spool Pro purchase unlocks the full instrument — all engines, sampling, every effect and sequencer, unlimited projects, export, and MIDI. No subscription. Spool is an original, independent work by a solo developer — affiliated with no hardware maker.
AmpGate
This app provides a real-time amplifier simulator for mobile devices, featuring exact digital captures of real amplifiers and full rigs. It allows users to browse and audition a vast library of tones, load custom impulse responses, and import their own captures. It also functions as an AUv3 plugin for use in music production hosts.
- Real-time amp simulation
- Vast tone library access
- Cabinet section with IR loader
- Noise gate and gain controls
- Low-latency processing
- AUv3 plugin compatibility
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Every amp ever, in your pocket. AmpGate is a Neural Amp Modeler (NAM) player for iPhone and iPad: a real-time amp sim that plays exact digital captures of real amplifiers and full rigs, including the new Architecture 2 (A2) models, the most accurate generation of neural captures yet. BROWSE HUNDREDS OF THOUSANDS OF TONES Connect your free TONE3000 account and the world's largest tone library opens right inside the app. Search by amp, gear or genre, audition any capture through your own guitar before saving it, and build your collection with one tap. - NAM engine with A2 model support - Cabinet section with impulse response loader, browse TONE3000 IRs or import your own WAV files - Tone stack (bass / mid / treble), noise gate, input and output gain - Low-latency processing tuned for live playing - Import your own .nam captures from the Files app AUv3 PLUGIN INCLUDED Load AmpGate inside GarageBand, Logic Pro, AUM, Loopy Pro, Cubasis and any other AUv3 host. The app and the plugin share one library: save a tone and it's already in your session. Neural Amp Modeler is an open-source project by Steven Atkinson. TONE3000 is a free third-party service; an account is optional.
Screenshots
Verdict
The clearest difference is review sentiment: spool. at 100% against AmpGate's 0%. spool. also leads on rating (5.0 vs 1.0) and ratings volume (9 vs 1). AmpGate's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement 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
Both are free to download. spool. sells 1 one-off in-app purchase. AmpGate asks for nothing beyond the download.
spool. holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: spool. has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of spool.'s written reviews are positive against 0% of AmpGate's.
| Parameter | spool. | AmpGate |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (9 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 9 — better | 1 |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Kristopher Yang | MATTEO DEMETRIO ZANARDI |
Customer experience
spool.
AmpGate
In-app purchases
spool.
- Spool Pro$9.99
AmpGate
No in-app purchases








