ERS_EchORek2 vs KP Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ERS_EchORek2
This audio plugin emulates the iconic Binson Echorec2 analog delay, offering a unique, dreamlike, and psychedelic sound. Developed with careful study of original schematics, it provides enhanced controls for musicians seeking a distinctive vintage delay effect.
- Authentic 70's analog delay emulation
- Binson Echorec2 sound
- Enhanced controls
- Psychedelic sound quality
- Vintage delay effect
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The ERS EchORek2 analog delay plugin was originally designed and sold by Harrie Munnik and his Dutch company EmptyRoomSystems. DDMF is proud to carry on the legacy by distributing and further developing the set of ERS plugins. The “ERS EchORek2” plug-in has been developed to sound like the Binson Echorec2 delay with enhanced controls. This delay has been used on thousands of recordings worldwide. Starting from the early Pink Floyd albums, its unique sound and benign unpredictability have made it the weapon of choice of musicians who wanted to add a dreamlike, psychedelic quality to their sound. As all ERS plugins, careful study of the original schematics have led to a plugin version that leaves nothing to be desired...
KP Viewer
This app provides a clear, at-a-glance display for Kemper Profiler Player users during live performances. It shows current bank, rig name, effect status, morph status, and an automatic tuner, turning older devices into a dedicated stage display.
- Live performance display
- Bank and Rig information
- Rig name display
- Effect status indicators
- Automatic tuner
- Dedicated stage display
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BEFORE PURCHASING KP Viewer requires a Kemper Profiler Player or Profiler Stage and a direct USB connection. • Lightning iPhone or iPad: USB-B-to-Lightning cable • USB-C iPhone or iPad: USB-B-to-USB-C cable Connect the cable, allow the Kemper to power on completely, then open KP Viewer. The app will not function without a compatible Kemper device and cable. KP Viewer gives Kemper Profiler Player users a clear, easy-to-read display for live performance. Connect your iPhone or iPad to your Kemper Player and KP Viewer provides the information you need at a glance, without navigating through menus. KP Viewer displays: • Current Bank and Rig • Rig Name • Effect status for A, B, C, D, X, MOD, DLY, and REV • Morph status • Automatic tuner display The interface is designed to be simple, highly visible, and useful on stage, making an older iPhone or iPad a practical dedicated display for your Kemper Player. KP Viewer is an independent application and is not affiliated with or endorsed by Kemper GmbH.
Screenshots
Verdict
The clearest difference is price: ERS_EchORek2 at $9.99 against KP Viewer's $19.99. ERS_EchORek2 also leads on iOS requirement (9.3 vs 15.0). KP Viewer's advantage is rating (5.0 vs 4.1) and update cadence (every 4 days vs every 26 months). On ratings volume, ads, in-app purchases and monetization model 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
ERS_EchORek2 costs $9.99 and KP Viewer $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
KP Viewer holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 7 and 3 respectively.
ERS_EchORek2 ships an update every 26 months, KP Viewer every 4 days. Both last shipped on October 24, 2026.
| Parameter | ERS_EchORek2 | KP Viewer |
|---|---|---|
| Price | $9.99 — better | $19.99 |
| Rating | 4.1 (7 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 7 — better | 3 |
| Update frequency | Every 26 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #193 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 13 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Siedschlag | DEREK BERNARD |
Customer experience
ERS_EchORek2
KP Viewer
In-app purchases
ERS_EchORek2
No in-app purchases
KP Viewer
No in-app purchases









