iDousyn vs Spiral Chorus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iDousyn
This app transforms your device into a professional music production tool. It features a sample-based synthesizer with dual-layer sampling, advanced filters, and a professional effects chain. Create immersive sounds and build captivating tracks with an intuitive interface and extensive sound library.
- Dual-layer sampling
- Advanced filters and EQ
- Professional effects chain
- Creative chord pads
- MIDI mastery
- Expansive sound library
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iDousyn transforms your iPhone and iPad into a premium sampler, synthesizer, and AUv3 plugin built for professional music production, beat making, and sound design. Powered by a massive dual-layer rompler engine, it delivers a touch-optimized workflow to create studio-quality music anywhere. Seamlessly integrating as a high-performance AUv3 Audio Unit, iDousyn is the perfect companion for Logic Pro for iPad, GarageBand, Cubasis, AUM, Loopy Pro, and other leading iOS DAWs. Whether you are producing EDM, making hip hop beats, scoring cinematic soundtracks, or designing ambient soundscapes, iDousyn gives you the ultimate sonic palette. Chord Sequencer & Harmony Engine • Ultimate Inspiration: Instantly browse, audition, and map over 432 chord variations and 100 global musical scales directly to your pads—no advanced music theory required. • Timeline Sequencer: Drag and drop your custom chords into the new visual timeline. Program rests, set loop lengths, and let the zero-latency lookahead scheduler play your progressions with perfect tempo synchronization. • Dynamic Performance: 10 customizable Chord Pads featuring intelligent strumming, dual MIDI keyboards, and assignable key ranges with real-time Neon Glow visual feedback. Dual-Layer Synthesis & DSP Effects • True Dual-Layer Rompler: Stack and blend two independent sample oscillators. Fine-tune with octave, semitone, cents, pan, and level controls for massive, evolving textures. • Studio-Grade FX Chain: Shape your tone with multi-mode filters, a parametric EQ, and fully automatable AUv3 effects including Reverb, Delay, Chorus, Flanger, Phaser, Compressor, and Limiter. Massive Sound Library & iCloud Sync • 1,100+ Premium Samples: An expansive built-in soundbank featuring heavy basses, lush synth pads, sharp leads, drum kits, acoustic guitars, and orchestral strings. • Smart Presets: Create unlimited custom patches. Your library is safely backed up with automatic, silent background iCloud Drive synchronization across all your Apple devices. Pro Recording & Export • Lossless Audio & MIDI: Record your live sessions directly within the app and export high-fidelity FLAC, WAV, AIFF, CAF, or M4A audio files, as well as full MIDI sequences. • AudioShare Integration: Instantly route your bounces to your favorite audio editors. • Background Audio: Keep your sequences running and your MIDI controllers active even while switching between apps. Designed for modern producers, beat makers, live performers, and synth enthusiasts, iDousyn brings desktop-class virtual instruments right to your fingertips.
Spiral Chorus
This music effect plugin offers an analog-modeled LCR chorus with touch-friendly controls and immersive 3D visuals. It seamlessly integrates into DAWs for iOS, adding depth and texture to various music productions.
- Analog Modeled LCR Chorus
- Touch-Friendly Controls
- Immersive 3D Visuals
- Versatile Music Application
- Optimized for iOS
- Seamless DAW Integration
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FX Forms #001 - Spiral Chorus from Wild Surmise Music, number one in the series of AUv3 FX plugins. Key Features: - Analog Modeled LCR Chorus: Delve into the rich, warm textures of an analog-modeled LCR (Left-Center-Right) chorus effect, bringing a new dimension to your tracks. - Touch-Friendly Controls: With an interface tailored for iOS, Spiral Chorus offers intuitive, touch-friendly controls. Effortlessly sculpt your sound with responsive sliders and xy pads, ensuring a seamless workflow. - Immersive 3D Visuals: Enhance your audio manipulation experience with captivating 3D visuals in the background. - Versatile Application: Whether you're working on dreamy soundscapes, dynamic beats, or cutting-edge experimental sounds, Spiral Chorus adds a layer of depth and texture to your music. - Optimized for iOS: Crafted specifically for the iOS environment, Spiral Chorus ensures a stable, high-performance experience on your favorite devices. 3D Visuals leverage SceneKit and Metal Shaders providing good visual performance on iOS devices. - Seamless Integration: Use Spiral Chorus seamlessly within your favorite DAW as an AUv3 plugin, fitting perfectly into your existing workflow.
Screenshots
Verdict
The clearest difference is review sentiment: Spiral Chorus at 89% against iDousyn's 29%. Spiral Chorus also leads on price (Free vs $4.99) and rating (5.0 vs 4.2). iDousyn's advantage is update cadence (every 2 months vs every 15 months) and ratings volume (159 vs 15). On ads, in-app purchases 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
Spiral Chorus is free to download; iDousyn costs $4.99 up front. iDousyn sells 1 one-off in-app purchase and Spiral Chorus sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Spiral Chorus holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: iDousyn has 159 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 29% of iDousyn's written reviews are positive against 89% of Spiral Chorus's.
iDousyn ships an update every 2 months, Spiral Chorus every 15 months. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.
| Parameter | iDousyn | Spiral Chorus |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.2 (159 ratings) | 5.0 (15 ratings) — better |
| Positive reviews | 29.3% of reviews | 88.9% of reviews — better |
| Number of ratings | 159 — better | 15 |
| Update frequency | Every 2 months — better | Every 15 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 1.2 GB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Jorge Lozada | Tom Power |
Customer experience
iDousyn
Spiral Chorus
In-app purchases
iDousyn
- Unlock ProFree
Spiral Chorus
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$9.99









