Cornerman for K.O. II vs RS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cornerman for K.O. II
This app serves as a sample librarian for the Teenage Engineering EP-133 K.O. II sampler. It allows users to upload, download, and organize backups directly from their device. Note that it requires a USB-C connection and is only compatible with iOS devices featuring such ports.
- Sample librarian for EP-133 K.O. II
- Upload and download backups
- Organize and share backups
- USB-C connection required
- iOS device compatibility
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Cornerman for K.O. II is a third party Sample Librarian for the Teenage Engineering EP-133 K.O. II Sampler Composer. The app doesn't make any sound by itself and is designed to work connected to the EP-133 via an USB-C connection. IMPORTANT: Please note that due to hardware limitations of the K.O. II the app is only compatible with iOS devices using USB-C ports. Power is provided by the mobile device for the EP-133 while connected. Features: - Upload and download backups from your K.O. II - Organize and share your backups with friends Drum Machine Funk is an independent software developer not affiliated with Teenage Engineering. We develop innovative apps for your favorite sampler and synthesizer.
RS
Compose, sequence, loop, and harmonize with a virtual vocal ensemble. This app offers four distinct modes for creating complex vocal arrangements, including real-time harmonization with your microphone and AI-powered song generation.
- Real-time vocal harmonization
- Multi-octave virtual keyboard
- Four recording loops for layered harmonies
- Manual note editor for pitch and length
- 16-pattern song sequencing
- AI song generation
- Native gear synchronization
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Unleash the full voice of your choir. RS-CHOIR is the ultimate companion app designed exclusively for the Teenage Engineering Choir. Whether you are a composer, producer, or live performer, RS-CHOIR equips you with powerful tools to compose, sequence, loop, and harmonize in real-time. Transform your choir into a fully customizable vocal ensemble with four intuitive modes and advanced synchronization features. FOUR POWERFUL MODES ****Loop & Edit: Play your choir using a multi-octave virtual keyboard. Capture your inspiration with four dedicated recording loops to build complex, layered harmonies. Need perfection? Use the manual note editor to fine-tune the pitch and length of any note until it perfectly fits your vision. ****Sequence: Arrange complete, evolving song structures by chaining up to 16 unique patterns. Define single notes or full chords for every step. Don’t just play notes—play words! Assign specific vowels and consonants to craft custom lyrics and vocal articulations. ****Sing: Turn your Choir into your personal backup singers. Simply tap to latch your microphone, sing a tone, and listen as the Choir seamlessly harmonizes with you in real-time. ****Play: Effortlessly save your compositions and play whenever you want. You can also load MP3 backing tracks that play in perfect parallel with your choir, giving you a massive, full-band sound. ADVANCED PRO FEATURES Native Gear Sync: RS-CHOIR isn't just an isolated app. Send an audio master clock sync pulse directly from your device to perfectly time your Choir with external gear, including Teenage Engineering Pocket Operators, modular synths, and other grooveboxes. AI Song Generation: Generate entirely new songs in seconds! Use our built-in AI workflow and optimized prompts with your favorite AI chat to generate fresh song data. Paste it back into the app, and your Choir will sing a brand-new, original piece. Full Vocal Integration: Bring your choir to the next level. Move beyond simple melodies by adding dedicated vocals and articulations to your masterpieces. Ready to start conducting? Download RS-CHOIR today and bring your vocal arrangements to life. Disclaimer: RS-CHOIR is an independently developed application and is not affiliated with, associated with, or endorsed by Teenage Engineering.
Screenshots
Verdict
The clearest difference is rating: RS at 5.0 against Cornerman for K.O. II's 2.5. RS also leads on update cadence (every 4 days vs every 3 months) and monetization model (free vs free with in-app purchases). Cornerman for K.O. II's advantage is ratings volume (11 vs 3) and iOS requirement (14.0 vs 18.6). 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. Cornerman for K.O. II sells 1 one-off in-app purchase and RS sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
RS holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 11 and 3 respectively.
Cornerman for K.O. II ships an update every 3 months, RS every 4 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Cornerman for K.O. II | RS |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (11 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 11 — better | 3 |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 45 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Delta Seven Kft. | Rolf Schmucker |
In-app purchases
Cornerman for K.O. II
- Restore/Backup Functionality$14.99
RS
- Creator Version$4.99
- Creator Version$8.99
- Creator Version$14.99









