# Cornerman for K.O. II — Sample Librarian for EP-133 > Sample librarian for Teenage Engineering EP-133 K.O. II sampler. (iPhone/iPad app by Delta Seven Kft..) - Source: https://appshunter.io/ios/app/cornerman-for-ko-ii/id6499280264 (this page in markdown: same URL + `.md`) - Developer: [Delta Seven Kft.](https://appshunter.io/developer/1355331300) - Category: Music, Utilities - Price: Free with in-app purchases - Rating: 2.50/5 from 11 App Store ratings · 10 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 45 MB - Languages: American English - Released: 2024-11-11 - Data updated: 2026-09-13 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/cornerman-for-ko-ii/id6499280264/reviews.md ## What is Cornerman for K.O. II? 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. ## Key features - Sample librarian for EP-133 K.O. II - Upload and download backups - Organize and share backups - USB-C connection required - iOS device compatibility ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Restore/Backup Functionality | $14.99 | one-time | ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/cornerman-for-ko-ii/id6499280264/reviews.md ### 1/5 — Waste *2026-05-03* Does not work. Make sure you perform/upload your projects into a daw. ### 2/5 — Pitched down *2025-12-13* Okay I love this idea and didn’t have the same problems as others. When I restored my first backup every sound was pitched down. Hoping this can be addressed in an update, I would love to use this. ### 1/5 — Can’t import samples *2025-12-10* The description says that this can import and trim samples but I can only find how to make and restore complete backups. Am I missing something? ### 1/5 — Really wanted this to work *2025-08-10* Sadly on my iPhone 15 Pro this app simply displays the splash screen then quits. ### 5/5 — My bad *2025-07-31* Actually , I m here now to say sorry , I figure out that my phone is tha the latest , but I was able to download the app in my laptop and is working perfectly t and exporting the files, is actually better than using the phone , so thanks for that , and I apologize completely about my past reviews based on my lack of knowledge, thank you ! For making this happened and il give you 10 stars , and I’ll give you authorization to delete the past bad review I left . ### 1/5 — It sucked want my money back *2025-03-26* It don’t work end of story $15 dollars that I want back and I feel like I’m entitled to $20 for having to go through the trouble of getting the app ### 1/5 — Don’t waste your time ( or money) *2025-03-21* Total garbage app. Wasn’t worth downloading. Crashes constantly ### 1/5 — doesn’t work *2025-02-23* I was excited to see an app like this as i was disappointed that TE didn’t have anything offline that didn’t require internet connection and thought an app was a good idea. I paid $15 and it doesn’t work. it just doesn’t work. i connect my ep-133 to my phone with c to c charger cable, hit backup button, wait as it shows a progress bar slowly fill (indicating that it’s doing something), then…. nothing. no backup. nothing happens. i’m so angry that i can’t get a refund on an app that doesn’t do the only thing it’s designed for. i got denied on my refund request. i submitted an appeal explaining the app doesn’t work. It doesn’t do the only thing it advertises and that i spent $15 and should be entitled to it back but my appeal was denied. don’t waste your money. I’m really frustrated and angry at being taken advantage of. ### 1/5 — $15 for a File-Saving App? Way Pricier Than Most in the App Store! *2024-12-20* I was excited to download it because it said it was free. I would’ve been fine paying a couple of bucks, but it turned out to cost $15. That’s much more expensive than most apps in the App Store with similar functionality! I wouldn’t mind paying a small fee, but $15 feels a bit steep for an app that’s primarily for saving files. Maybe the price would be justifiable if it allowed uploading and downloading samples like the web app does. ### 5/5 — So excited to see a Teenage Engineering app on iOS *2024-11-20* This app is awesome - obviously it backs up your Ko ii - onto your device, without the need for going online to the TE website for the ep-133 browser tool. I hope to see the ability to navigate/edit folders and samples too one day; as it is fantastic work and thank you for making this! ## Frequently asked questions about Cornerman for K.O. II ### What is Cornerman for K.O. II? Cornerman for K.O. II is a third-party sample librarian designed to work with the Teenage Engineering EP-133 K.O. II sampler. It helps you manage your sample backups directly from your iOS device. ### How does Cornerman for K.O. II connect to the EP-133? The app connects to the EP-133 K.O. II via a USB-C connection. Power is provided to the EP-133 by the connected mobile device. ### What devices are compatible with Cornerman for K.O. II? Due to hardware limitations, Cornerman for K.O. II is only compatible with iOS devices that have USB-C ports, such as iPhones and iPods. ### Can I organize and share my samples with Cornerman for K.O. II? Yes, the app allows you to organize your sample backups and share them with friends. This feature helps in managing and distributing your creative work. ### Does Cornerman for K.O. II make any sound? No, the app itself does not produce any sound. Its sole purpose is to act as a librarian and management tool for the EP-133 K.O. II sampler. ### What is the rating for Cornerman for K.O. II? Cornerman for K.O. II has a rating of 2.7 stars based on 9 user ratings. This indicates a mixed reception from its current user base. ### How often is Cornerman for K.O. II updated? The latest version, 1.0.2, was released on May 21, 2025. This suggests the app is actively being maintained and updated by the developer. ### Is Cornerman for K.O. II free to use? Yes, Cornerman for K.O. II is available for free. However, it does feature in-app purchases, which may offer additional functionality or content. ## Version history (last 3 releases) ### 1.0.2 — 2025-05-21 - Updated transfer for firmware 2.0 - Updated guide - Bug fixes and performance improvements ### 1.0.1 — 2024-11-11 Bugfixes and performance improvements. ### 1.0 — 2024-11-07 No release notes. ## Apps similar to Cornerman for K.O. II | App | Rating | Price | Category | | --- | --- | --- | --- | | [PunchKit](https://appshunter.io/ios/app/punchkit/id6785249847) | 4.9 (50) | Free | Music | | [OP-Z](https://appshunter.io/ios/app/op-z/id1088232296) | 4.2 (115) | Free | Music | | [M8C](https://appshunter.io/ios/app/m8c/id6746388495) | 4.8 (16) | Free | Music | | [SEQTRAK](https://appshunter.io/ios/app/seqtrak/id1544687021) | 4.8 (9) | Free | Music | | [Condukt: MIDI Controller](https://appshunter.io/ios/app/condukt-midi-controller/id1473063860) | 5.0 (8) | Free | Music | | [Doctor Vibe (Legacy)](https://appshunter.io/ios/app/doctor-vibe-legacy/id6479925332) | 4.8 (9) | Free | Music | ## More apps by Delta Seven Kft. - [Audio Bunny](https://appshunter.io/ios/app/audio-bunny/id1521653318) - [iDP/4](https://appshunter.io/ios/app/idp4/id1526481455) - [SPL-12](https://appshunter.io/ios/app/spl-12/id1549379598) - [Bassliner](https://appshunter.io/ios/app/bassliner/id1566713961) - [Matrix-1000 Controller](https://appshunter.io/ios/app/matrix-1000-controller/id1593250150) - [SPL-44](https://appshunter.io/ios/app/spl-44/id6464316172) All apps by Delta Seven Kft.: https://appshunter.io/developer/1355331300 ## Related topics [teenage engineering](https://appshunter.io/ios/topics/teenage-engineering) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-13.*