iSequence HD vs iSyn Poly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iSequence HD
Create professional music on your iPad with an intuitive 8-track sequencer, a vast library of instruments, and flexible mixing with DSP effects. Record, edit, and arrange loops, beats, and melodies in real-time, controlling every aspect of your music project.
- 8-track sequencer
- 160+ built-in instruments
- Custom instrument sampler
- Real-time recording and automation
- Step sequencer and FX editor
- Flexible mixer with DSP effects
- Wi-Fi file sharing
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iSequence is a long-running iPad music app appreciated for its speed, simplicity, and distinctive workflow. Build beats, melodies, and arrangements with an intuitive 8-track sequencer with 32-step patterns, shape sounds with its sampler, and mix everything with flexible DSP effects. Whether you are sketching loops or building full tracks, iSequence keeps music creation direct and hands-on. FAST, FLUID WORKFLOW Create patterns, record parts in real time, and edit them without interrupting playback. Switch between tracks, instruments, step sequencing, and automation as you build your song. iSequence is built for sketching ideas quickly, jamming with loops, and arranging complete tracks in a simple, focused environment. INSTRUMENTS • 160 built-in instruments, including acoustic sounds, drum kits, pads, leads, sweeps, and ambient textures • Additional sound banks available in the BankShop • Play with the on-screen piano keyboard or drum pads • Create custom instruments with the built-in sampler • Supports CoreMIDI and MIDI instruments REAL-TIME RECORDING AND AUTOMATION • Record notes as you play • Change tracks and instruments during playback • Use the metronome and slowdown mode for easier recording • Record parameter changes in real time STEP SEQUENCER • 8 tracks with FX curve editing • 32 steps per row / pattern • Instruments are not tied to tracks, allowing flexible sequencing and layering • Edit notes with the piano keyboard, drum pads, and other controls • Adjust note duration, panning, velocity, and gliss • Copy, paste, move, and transpose patterns and selections • Arrange patterns into full song structures MIXER AND EFFECTS • Adjust tempo, master volume, and shuffle • Mute, solo, and set levels for each track • Route tracks to 5 configurable effect channels • Includes Filter, Reverb, Flanger, Delay, Ring Modulator, EQ, Lo-Fi Crusher, Live Looper, and Distortion SAMPLER • Import, record, or paste samples to build custom instruments • Edit loop points, ADSR envelope, and sample mapping • Slice loops and synchronize them to tempo automatically FILE SHARING • Export songs as HSQ, MIDI, or WAV • Import samples and presets • Copy tracks to the audio clipboard • Import HSQ songs
iSyn Poly
Create electronic music with three virtual analog synthesizers and a drum machine. Features a full sequencer for arranging songs and live editing capabilities. Supports external MIDI keyboards for enhanced control.
- Three programmable virtual analog synthesizers
- Sample playback drum machine with 17 kits
- Full-featured four-track sequencer
- Gesture-oriented user interface for live editing
- Support for CoreMIDI compatible hardware keyboards
- Global effects unit with phaser, flanger, chorus, and delay
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iSyn Poly is an electronic music studio for use with Apple iPad. iSyn Poly places an unbelievable number of features including three studio-quality, fully programmable virtual analog synthesizers and a drum machine packed in just three different screens on your iPad ! Each synthesizer is a full-featured analog modeling synth with three oscillators, a classic 24 db/oct ladder-style lowpass filter, independent filter and amp envelope generators, and full modulation routings. With our 10+ years of experience with analog simulations you can expect some serious sound easily covering all those fat frequencies so prevalent in modern production. iSyn Poly also includes a sample playback-based drum machine with seventeen kits, each containing eight samples. Drum samples include 808, 909, modular synth drums and numerous 80's drum machines. Volume, pan and decay time are individually adjustable and pitches are tunable over a wide range for crazy effects. The full fledged sequencer let you arrange complete songs and can record the notes and controller movements of your performance. The unique gesture oriented user interface makes it ideal for live editing of notes and automations. With the Apple iPad Camera Connection Kit you can use a CoreMIDI compatible MIDI Keyboard to control iSyn Poly. iSyn Poly is developed by VirSyn with content from audioMIDI.com. Features: Three Independent Synthesizers One polyphonic synth with eight voices and two monophonic synths with: • Three oscillators with sawtooth, pulse, triangle and sine waves. Modulations routings: LFO->pitch, filter ADSR->cutoff, LFO->pulse width. • White/Pink noise generator. • Classic 24 dB/oct ladder-style lowpass filter with drive parameter. Modulations routings: LFO->Cutoff, Filter ADSR->Cutoff. • Amp section includes distortion with drive, asymmetry and crusher. • Control matrix allows real time control of five parameters using the X/Y touch pad, the modulation wheel and the tilt sensors of the iPad. • Arpeggiator for automated sequences. • 64 factory presets, unlimited user presets can be shared. Drum Machine • Eight simultaneous instruments arranged into eight user-selectable drum kits. • Editor page allows tuning, panning, level and decay time for individual instruments. Effects Section • iSyn Poly features one global effects unit with phaser, flanger, chorus and stereo/cross delay. Live • Play melodies live with onscreen keyboard/drum pads. Drag fingers for slides and vibrato. • Optionally use CoreMIDI compatible hardware keyboard. Full featured Sequencer • Four track sequencer with piano roll and automation editor. • Real time recording with quantize function and metronome. • Arrange your songs with variable length patterns. Move and copy/paste patterns. • Recording and playback of X/Y Pad movements, mod wheel, pitch bend and key velocity. • Full set of editing functions with unlimited undo. Global • Manage unlimited number of songs. • Render song or patterns to audio and midi files. • Audio pasteboard. • Audiobus 2 support (requires iOS 7 or newer). • Exchange songs and user presets with File Sharing in iTunes.
Verdict
The clearest difference is price: iSequence HD at Free against iSyn Poly's $0.99. iSequence HD also leads on review sentiment (77% vs 64%) and ratings volume (33 vs 4). iSyn Poly's advantage is in-app purchases (none vs 8) and iOS requirement (8.0 vs 15.6). On rating, update cadence, ads 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
iSequence HD is free to download; iSyn Poly costs $0.99 up front. iSequence HD sells 8 one-off in-app purchases. iSyn Poly asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.2 for iSequence HD against 4.3 for iSyn Poly. That said, the two scores are not equally well evidenced: iSequence HD has 33 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 77% of iSequence HD's written reviews are positive against 64% of iSyn Poly's.
iSequence HD ships an update every 3 months, iSyn Poly every 6 months. Both last shipped on October 23, 2026.
| Parameter | iSequence HD | iSyn Poly |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.2 (33 ratings) | 4.3 (4 ratings) — better |
| Positive reviews | 76.6% of reviews — better | 64.0% of reviews |
| Number of ratings | 33 — better | 4 |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPad | iPad |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 156 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | BeepStreet | Harry Gohs |
Customer experience
iSequence HD
iSyn Poly
Bugs and requests
iSequence HD
Reported bugs
4 issues- Crashes on startup or during use
- Issues with sample loading and playback
- Inconsistent behavior with certain features
- Compatibility problems with newer iOS versions
Requested features
6 requests- Expanded track count
- More effects and sound design capabilities
- Audiobus and Inter-App Audio integration
- Improved sample import and management
- Support for more time signatures and rhythms
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- Ability to save and load full projects
iSyn Poly
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iSequence HD
- Funny farm bank$1.99
- Chiptunes bank$1.99
- Acoustic bank$2.99
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- Electro/house bank$2.99
- Trance waves$2.99
- Loops vol.1$2.99
- Loops vol.2$2.99
- Beat elements bank$2.99
iSyn Poly
No in-app purchases








