Companion apps for the Teenage Engineering EP-Series
A comparison of the apps that work with the EP-133 K.O. II, EP-40 Riddim, and EP-1320 Medieval.
This page is a survey, not a scoreboard and accurate as of September 2026. These are all actively developed apps so features change. Check each app’s store listing for its current state.
Best Friend
A companion app for all three EP-Series samplers — EP-133 K.O. II, EP-40 Riddim, and EP-1320 Medieval — on iPhone, iPad, Mac, and Android. It connects over USB-C and covers the pad editor, a Scene and Song timeline with fader automation, multi-track stem bouncing off the hardware, a MIDI keyboard with chords and an arpeggiator, a full sample editor with effects, stem splitting, multi-sample building on the EP-40 and EP-1320, and a Library of Bank Snapshots, backups, and bounces synced by iCloud on Apple devices. One-time purchase per store.
App Store · Google Play · What it does
EP Sample Tool
The EP Sample Tool is the official web-based utility developed by Teenage Engineering for managing audio on their EP hardware line, requiring a WebMIDI-compatible browser and a direct USB-C connection. It allows users to easily drag and drop audio files to upload, download, or delete samples.
Cornerman for K.O. II
A dedicated third-party sample librarian and backup utility for the physical hardware over a direct USB connection. It focuses purely on utility by allowing users to securely upload, download, timestamp, and share device backups.
EP-PatchStudio
A companion app for the EP series with an emphasis on sample preparation: multi-sample creation, auto-sampling, batch processing, and converting between project formats.
PunchKit
Designed to speed up music production workflows, this app features offline 12-pad kit assembly, automatic USB audio take recording, and local AI-driven stem separation. It also introduces a “Punch It” live performance mode that allows producers to destructively bake effects like tunable LoFi filters and vinyl artifacts directly into their audio.
At a glance
A blank cell means unverified as of September 2026, not unsupported. Check each app’s own listing for its current state.
| Best Friend | Official EP Sample Tool | Cornerman | EP-PatchStudio | PunchKit | |
|---|---|---|---|---|---|
| EP-133 K.O. II | Yes | Yes | Yes | Yes | Yes |
| EP-40 Riddim | Yes | Yes | Yes | Yes | |
| EP-1320 Medieval | Yes | Yes | Yes | Yes | |
| Desktop Browser | Yes | ||||
| Mac | Yes | Yes | |||
| iPhone / iPad | Yes | Yes | Yes | Yes | |
| Android | Yes | Yes | |||
| Backups | Yes | Yes | Yes | Yes | Yes |
| Backup extraction | Yes | Yes | |||
| Sample List | Yes | Yes | Yes | Yes | |
| Bulk Management | Yes | Yes | Yes | ||
| Sample editing | Yes | Yes | Yes | ||
| Effects | Yes | Yes | Yes | ||
| Stem splitting | Yes | Yes | |||
| Sample processing | Yes | Yes | |||
| Batch processing | Yes | Yes | |||
| Multi-sample building | Yes | Yes | |||
| Auto-sampler | Yes | ||||
| Pad Settings Display | Yes | ||||
| Pad Group Display | Yes | ||||
| Performance effects | Yes | Yes | |||
| Kit/Group building | Yes | Yes | Yes | ||
| Scene/Song Screen | Yes | Yes | |||
| Fader automation view | Yes | Yes | |||
| MIDI Export | Yes | Yes | |||
| Individual track export | Yes | ||||
| Group Export | Yes | ||||
| Stereo Export | Yes | Yes | |||
| Stereo Capture | Yes | ||||
| MIDI keyboard | Yes | Yes | |||
| Arpeggiator | Yes | ||||
| iCloud sync | Yes | ||||
| Price | $9.99 | Free | $14.99 | $29.99 | $14.99 |
Related
Best Friend is not affiliated with, endorsed by, or sponsored by Teenage Engineering, and is not affiliated with the developers of the other apps listed here. EP-133, EP-40, EP-1320, and related names are trademarks of their respective owners.
