ScratchLab vs S
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ScratchLab
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ScratchLab is a professional capture and session-logging tool designed for DJs and structured recording workflows. It helps keep sessions organized so takes, notes, and supporting media are easier to manage. With ScratchLab, you can: • capture and organize session data • track takes with clear logging • support repeatable recording workflows • keep performance and practice sessions documented • simplify review and file organization after recording ScratchLab is built for workflows where consistency matters, whether you are documenting scratch practice, recording structured sessions, or managing repeated capture setups for training and review. It is designed to reduce confusion, improve session organization, and make post-session handling more efficient. The focus is simple: a clear, reliable workflow for capturing and organizing DJ session material without unnecessary complexity.
S
This app is a polyphonic synthesizer that works with specific hardware. It offers a variety of sound engines, filters, and effects for creating unique audio textures. Advanced modulation options and a flexible routing system allow for deep sound design.
- Dual engine slots per voice
- Multiple sound flavors (analog, wavetable, FM, speech)
- Classic and Modern filter modes
- Advanced FX rack
- Two free-routing LFOs
- Unified mod matrix
- Standalone, AU, and AUv3 formats
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s-2 is a polyphonic synthesizer designed to work with the Roland AIRA Compact S-1. ENGINE Each voice runs two parallel engine slots that mix together. Pick a sound flavor per slot, including: • Classic analog — saw, square, sub, noise, pulse-width • Wavetable • FM • Speech • Chord • Plucked string FILTER AND FX Classic mode runs a vintage-style ladder filter into a simple Delay → Chorus → Reverb chain. Modern mode swaps in a multi-mode SVF (LP / BP / HP) followed by a 3-slot Advanced FX rack with Bitcrusher, Drive, Flanger, Phaser, Auto-Filter, Tape Delay, Plate Reverb and Chorus. MODULATION Two free-routing LFOs (sine / triangle / saw / square / random / noise, with optional clock-sync), a dedicated filter envelope with two destination slots, and a unified mod matrix dialog that visualizes every routing in one place. Click any knob in Learn mode to assign — no digging through menus. FORMATS • Standalone for iOS • Audio Unit (AU) for Logic Pro and other AU hosts • AUv3 plugin for iPad / iPhone in AUM, GarageBand, Cubasis and more - s-2 is an independent third-party application. It is not affiliated with, sponsored by, or endorsed by Roland Corporation. "Roland", "AIRA", "AIRA Compact", and "S-1" are trademarks of Roland Corporation, used here only to describe MIDI compatibility between this app and that hardware.
Screenshots
Verdict
The clearest difference is iOS requirement: S at 16.0 against ScratchLab's 18.0. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ScratchLab | S |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (4 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | — | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 216 MB | 17 MB |
| Age rating | 12+ | 4+ |
| Developer | Karl Watson | Mathias Kirkerød |
In-app purchases
ScratchLab
No in-app purchases
S
No in-app purchases









