Multi vs ERS_250
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Multi
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This is a AUv3 compatible audio effect which can be used as plugin with your favourite DAW such as Cubasis, Meteor, Auria or GarageBand. It supports a modern graphical interface and presets with stereo meters for monitoring signal levels. The Multi-Tap delay takes the traditional digital delay to the next level. Instead of a single delay line you have up to 4 taps at your disposal. Each tap has an adjustable delay which can either be a value in milliseconds or a division of a beat. This is because the effect tracks the host tempo and can automatically match the beat by just pressing the sync button on each tap. Some taps can be free running while others synced to the beat. What really makes this type of delay shine is that fact you can choose to either have all taps play back in series or stack them end on end in parallel mode. This allows for some very creative and unusual patterns which are not achievable using a conventional delay. A dedicated LFO synced to the host tempo can also be used to apply modulation to each of the taps. You can modulate the frequency to create a chorus/ensemble type effect, vary the amplitude to create a vibrato effect, create an oscillating pan or even run the tap in reverse echo mode or through a band pass filter. This is a great tool to have at your disposal, allowing you to some unusual delay effects not available with a conventional delay. All parameters fully support automation. This is one of a suite of AUv3 compatible plugins which will also soon be available from 4Pockets.
ERS_250
This audio plugin faithfully replicates the EMT 250, the first digital hardware reverb ever made. It offers adjustable decay time, frequency response, predelay, and a dry-wet ratio, with an optional modern schematic.
- Replication of original EMT 250 schematics
- Adjustable reverb decay time (0.4-5s)
- Adjustable low and high frequency response
- Adjustable predelay
- Additional low-pass filter
- Adjustable Dry-Wet ratio
- Optional 'modern' schematics
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The ERS 250 reverb audio plugin was originally designed and sold by Harrie Munnik and his Dutch company EmptyRoomSystems. DDMF, having been a part in the development of the first version some years ago, is proud to carry on the legacy by distributing and further developing the set of ERS plugins. This unit is a faithful replication of the first digital hardware reverb ever made, the EMT 250. Only 250 units of that legendary studio tool have ever been produced… needless to say, the availability as an audio plugin has received an enthusiastic welcome by the audio engineering and production community. Now this plugin is finally available for compatible iOS hosts that support either AUv3 or InterAppAudio. Features: - Careful reproduction of the original schematics - Adjustable reverb decay time (from 0.4 to 5 seconds), low frequency response, high frequency response, and predelay - Additional low-pass filter to create darker sounds - Dry-Wet ratio adjustable - Alternative “modern” schematics available
Screenshots
Verdict
The clearest difference is price: Multi at $4.99 against ERS_250's $13.99. ERS_250's advantage is update cadence (every 8 months vs every 22 months) and iOS requirement (9.3 vs 13). On 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
Multi costs $4.99 and ERS_250 $13.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Multi ships an update every 22 months, ERS_250 every 8 months. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.
| Parameter | Multi | ERS_250 |
|---|---|---|
| Price | $4.99 — better | $13.99 |
| Rating | — | 4.3 (6 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 22 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 | 9.3 — better |
| Further details — not scored | ||
| Size | 7 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Christian Siedschlag |
In-app purchases
Multi
No in-app purchases
ERS_250
No in-app purchases









