# Best Friend for K.O. II — App for EP-133, EP-40, EP-1320 > Companion app for Teenage Engineering EP-Series samplers, offering extended display and editing features. (iPhone/iPad app by Brian Holt.) - Source: https://appshunter.io/ios/app/best-friend-for-ko-ii/id6782250723 (this page in markdown: same URL + `.md`) - Developer: [Brian Holt](https://appshunter.io/developer/6782250725) - Category: Music - Price: $9.99 - Rating: 4.90/5 from 7 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 26.0 · 281 MB - Languages: American English - Released: 2026-07-02 - Data updated: 2026-09-07 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/best-friend-for-ko-ii/id6782250723/reviews.md ## What is Best Friend for K.O. II? Best Friend is the unrivaled companion app for Teenage Engineering EP-Series Samplers. Connect your EP-133, EP-40, or EP-1320 via USB-C to manage your hardware, upload and edit new files, and see your pad settings. Best Friend is an extended display and feature augmentation app for the physical EP-133, EP-40, or EP-1320. Connecting to one of these is REQUIRED for the app to function. Use a USB-C to USB-C cable. Lightning iPhones and iPads can connect with USB-IF certified USB-A to USB-C cable and a MFi-certified Lightning to USB adapter. Scenes: - See all notes across all banks in a Scene or Song - See fader automation lanes for each bank - Export REAL audio stems of every individual pad directly from your EP - Navigate through the Scene timeline with automatic playhead following Bounce and Export Audio Stems: - Export REAL audio stems directly from the hardware WITHOUT AI separation for any Scene or Song - Choose from every individual pads (all 48), group mixdowns, or stereo mixdowns - Fader automation is included in the export - Export MIDI data from a Scene or Song - Bring your bounces into your DAW of choice for mixing MIDI Controller: - Build rich chords with a button. Pick major, minor, suspended, or diminished triads then add a 6th, 7th, or 9th for flavour - Play the velocity-sensitive keyboard - Arpeggiator with 4 modes, 6 rates, and 3 octaves synced to the hardware clock - Configure your own custom chords to any of the Chord or Extension buttons - Split each key into 1-3 zones for playing chords in alternate positions - Add pitch bends or modulation to any chord Sample Editing: - Extract stems (drum, bass, vocal, guitar, and other instrument) from your samples - Build and edit multi-samples on the EP-1320 or EP-40 - Use Repitch to reduce the file size - Permanent cropping - Increase volume with normalize - Reverse playback - Convert stereo to mono - Change sample rate - Apply effects: 3-band EQ; compression; distortion and saturation; octaver; phaser; chorus; tremolo; delay; and reverb - Automatically detect and set the key - Save default pad settings Hardware Management: - Bulk upload samples from your Files and Videos - Bulk move, share, and delete samples - Edit and replace samples in place - Backup your Project or entire System - Import Project and System from the official EP Sample Tool - Extract Projects from your System Backups - Preview stereo mixes of your Project Backups - Save Bank Snapshots to share and recall later - Automatic iCloud syncing across your Apple devices Pads: - Mute and unmute individual pads - Apply performance effects to individual pads: mute, pitch up, pitch down, reverse - Drag and drop pads to reassign them across groups - See an entire bank of samples at once - See the sample waveform along with its name and length - See and edit the trim, attack, and release windows - See and adjust volume, pitch, pan, mute, play mode, time-stretch, and MIDI channel - See Supertone settings on your EP-40 Universal support: - works on iPhone, iPad, and MacOS with built-in iCloud syncing - works with EP-133 K.O. II, EP-40 Riddim, and EP-1320 Medieval with dedicated themes for each device Best Friend is not affiliated with Teenage Engineering in any way. ## Key features - Extended display for EP-Series samplers - Waveform and pad setting visualization - Sample editing (trim, attack, release, pitch, pan) - Bulk sample upload and management - Audio extraction from videos - Sample repitching and normalization ## Chart rankings - #12 in Top Paid · Music (US App Store) ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/best-friend-for-ko-ii/id6782250723/reviews.md ### 5/5 — Very Good! *2026-09-04* Amazing App, keeps getting better with every update! ### 1/5 — almost Works… sometimes *2026-08-30* I thought this would be a practical app to backup projects on my iphone. on almost every project i tried it has issues and doesnt back up right. the design is nice but i would prefer it working . would not recommend. **Developer response:** Hi! I’ve done a fair bit of backup testing so I’m not sure what’s giving you a problem. Please send me a message at feedback@epbf.app and I’ll try to troubleshoot it. ### 5/5 — Best Friend for my EP 133 *2026-08-29* Really liking the layout. So far it has been very easy to navigate. Still playing around and discovering but so far this has been very helpful as I am learning how to use EP133 KO II ### 5/5 — Genial *2026-08-13* Tolles Tool für den EP-133. Das wertet das Gerät noch ein paar Stufen höher auf mit den vielen Funtionen. Kein Abo, braucht kein Internet, besser geht’s nicht. (So etwas bräuchte ich auch für den OP-XY 😉) Dankeschön an Brian. 🙏 **Developer response:** So happy you like it! ### 5/5 — Works great! *2026-07-09* Very happy to not have to have a laptop nearby to make adjustments to the ko2! **Developer response:** Thanks so much! ## Frequently asked questions about Best Friend for K.O. II ### What is Best Friend? Best Friend is a companion app designed to work with Teenage Engineering EP-Series samplers like the EP-133. It provides an extended display and advanced editing features for your sampler. ### Do I need a Teenage Engineering sampler to use Best Friend? Yes, connecting to an EP-133, EP-40, or EP-1320 via USB-C is required for the app to function. It acts as an augmentation for these physical devices. ### What kind of sample editing features does Best Friend offer? Best Friend allows for permanent cropping, repitching to reduce file size, normalization to increase volume, reversing playback, converting stereo to mono, changing sample rate, and applying a 3-band EQ. ### Can I manage multiple samples at once with Best Friend? Yes, the app supports bulk operations for uploading samples from your Files and Videos, deleting samples, moving samples, and sharing samples. ### Is Best Friend free to download? No, Best Friend is a paid application. It is available for purchase at $7.99. ### Does Best Friend have ads? No, Best Friend does not contain advertisements. It is a paid app with no in-app purchases or ads. ### What devices does Best Friend support? Best Friend is currently supported on iPhone devices. It requires a USB-C connection to your Teenage Engineering sampler. ### How often is Best Friend updated? The latest version of Best Friend is 2.2, and it was last updated on July 12, 2026. Updates typically occur to improve functionality and compatibility. ## Version history (last 5 releases) ### 3.0 — 2026-09-04 New Features: - See all of your sequenced notes and fader automation lanes across any Scene or Song. - Export multi-track audio stems of your Scenes or Song directly from the hardware. Every single pad is isolated using the REAL samples and data, all WITHOUT AI separation. - Make your own chord presets in the MIDI Controller. - Split the Keyboard into zones for easier alternate chords positions. - Add the lower octave to your chord. - Extract Projects from your System Backups - Audio Previews of your Project Backups - A brand new Library for managing and arranging your Backups, Bank Snapshots, and Bounces - iCloud support that automatically backs up and syncs Best Friend across all of your Apple devices - Automatic key detection of your samples - Animated onboarding guides for every screen Fixes: - Backups could fail when encountering a corrupted sample - Undo wouldn't fire when deleting Bank Snapshots or Backups - MIDI Controller could crash the hardware with too much data ### 2.8 — 2026-08-24 New Features: - MIDI Controller with a Chord Builder plus pitch, modulation, and velocity parameters - MIDI arpeggiator with 4 modes, synced to the hardware clock - Octaver effect to add an octave up or down layer to your sample - Navigation double-tap shortcuts that toggle between: individual Pads settings and Pad Groups; Samples browse and select mode; and Backups and App Settings. - Increased the compressor attack range from 2ms to 10ms Fixes: - Wav displays made vertical scrolling difficult, especially on multi-sample editing - Pad Performance mute and mute groups animate opacity instead of pad colour - The compressor distorted audio previews ### 2.7 — 2026-08-17 Just bug fixes this time! - Drag and drop pads to rearrange is now reliable for both samples and Supertone - Sample name is now displayed on Sample Edit page - Last imported location can now be manually set - Performance improvement for pad playing animation - Drag and drop samples to far slots is now reliable - Pan knob filled from the left instead of the centre ### 2.6 — 2026-08-09 New features and improvements: - Refreshed design and dedicated device themes - Universal iPad and MacOS support with improved landscape screens for iPhone - Mute and unmute individual pads - Apply performance effects to individual pads: mute, pitch up, pitch down, reverse - Drag and drop pads to reassign them across groups - Drag pads to reorder Bank Snapshots - Drag and Drop support for file importing - Skip a file during multi-import so you don't need to discard the entire batch - New Preferences Screen Fixes: - Last opened folder was forgotten when importing samples - Delay XY Grid drag response was delayed ### 2.5 — 2026-08-01 New features and improvements: - Stem Splitter. Extract drums, bass, vocals, guitars, and other instruments from your samples then use them in isolation or blend them together in a new mix. - Improved Preview playback peformance. Preview will no longer stop when changing fidelity, repitch, normalize, and other values. Fixes: - Compressor attack and release ranges were off by a decimal point. Now attack = .1ms -> 2ms; release = 40ms -> 1000ms. - Double tap effects faders to reset. - When sample was reversed playhead played backwards, which was technically showing forward play. Now playhead always begins from the left. - Deleted samples no longer re-appear after delete. - Prevented backup attempts across devices, which could fault the memory. ## Related topics [best friend](https://appshunter.io/ios/topics/best-friend) --- *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 2026-09-07.*