Comparison

Multi vs ERS_250

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Multi

Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

Multi2 screens
ERS_2502 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Multi costs $4.99 and ERS_250 $13.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Multi versus ERS_250: the parameters behind the verdict, then further details
ParameterMultiERS_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 frequencyEvery 22 monthsEvery 8 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS139.3 — better
Further details — not scored
Size7 MB9 MB
Age rating4+4+
Developer4Pockets.comChristian Siedschlag

In-app purchases

None

Multi

No in-app purchases

None

ERS_250

No in-app purchases

Questions

Is Multi free?
Multi costs $4.99, with no in-app purchases.
Is ERS_250 free?
ERS_250 costs $13.99, with no in-app purchases.
Do Multi or ERS_250 have ads?
Neither Multi nor ERS_250 shows ads.
Which is updated more often, Multi or ERS_250?
Multi ships an update every 22 months, and ERS_250 every 8 months. Most recently, Multi was updated on September 10, 2026 and ERS_250 on September 21, 2026.

Other comparisons