Comparison

SimplyPhaser vs MIDI FX PRO

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

Head to head
About

SimplyPhaser

Apply a classic phaser audio effect to your music with this straightforward tool. It uses all-pass filters to create out-of-phase signal copies for a retro sound. Use it within compatible music hosts or directly within the app.

Highlights
  • Classic phaser audio effect
  • All-pass filter implementation
  • AUv3 app extension support
  • Standalone app experimentation
  • Retro sound generation
Features
Read full description

A simple but straightforward phaser audio effect to give you that nice retro feel. Unlike the SimplyFlange effect that is also available, this filter does not involve any delay buffer. Rather, it uses a string of all-pass filters to generate out-of-phase copies of the input signal. These are mixed together to produce the classic phasing effect. The filter lives in an AUv3 app extension so it is available for use in any host app that supports AudioUnit components such as AUM or Cubasis or GarageBand. You can also experiment with the audio effect directly in this app.

About

MIDI FX PRO

This app is a powerful MIDI workstation for iOS and Mac, allowing users to control and process MIDI signals. It offers features like harmonization, transposition, arpeggiation, and sequencing for external or virtual synths. It also includes internal instruments and effects for mobile music creation.

Highlights
  • MIDI signal processing
  • Harmonize, Transpose, Arpeggiate
  • Sequencer for synths
  • Delay/looper
  • Internal instruments (drums, piano, synth)
  • Filter notes by velocity
Read full description

Buy once and get the iOS and Mac apps (with Family Sharing) This is the Unlocked Version of MIDI FX. You can buy this version instead of unlocking the free one through IAP Control your MIDI signals and process them in any combination of ways: Harmonize, Transpose, Arpeggiate, etc... Or use the Sequencer to play any external or virtual synth. Use a MIDI interface to unlock the power of the app to control multiple synths with one keyboard, play one note and generate chords, basslines, etc... Use the delay/looper or filter notes based on velocity or other parameters to send to different synths/effects. A MIDI workstation in your pocket (or your iPad/Mac) You can also use some internal instruments (drums sampler, piano or synth) if you are away from your MIDI gear, and sequence whole songs inside the app, or use other synth apps as input/output for MIDI FX. Your imagination is the limit!

Screenshots

SimplyPhaser2 screens
MIDI FX PRO1 screens

Verdict

The call

The clearest difference is review sentiment: MIDI FX PRO at 50% against SimplyPhaser's 0%. MIDI FX PRO also leads on rating (4.0 vs 3.0) and ratings volume (4 vs 1). SimplyPhaser's advantage is price ($0.99 vs $9.99). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

SimplyPhaser costs $0.99 and MIDI FX PRO $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

MIDI FX PRO holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 0% of SimplyPhaser's written reviews are positive against 50% of MIDI FX PRO's.

UpkeepUpdate frequency

SimplyPhaser ships an update every 3 weeks, MIDI FX PRO monthly. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

Scorecard5 real differences · 5 level
SimplyPhaser versus MIDI FX PRO: the parameters behind the verdict, then further details
ParameterSimplyPhaserMIDI FX PRO
Price$0.99 — better$9.99
Rating3.0 (1 ratings)4.0 (4 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings14 — better
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS16.414.7 — better
Further details — not scored
Size5 MB263 MB
Age rating4+4+
DeveloperBrad HowesJorge Arroyo

Customer experience

SimplyPhaser

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

MIDI FX PRO

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

SimplyPhaser

No in-app purchases

None

MIDI FX PRO

No in-app purchases

Questions

Is SimplyPhaser free?
SimplyPhaser costs $0.99, with no in-app purchases.
Is MIDI FX PRO free?
MIDI FX PRO costs $9.99, with no in-app purchases.
Which has better reviews, SimplyPhaser or MIDI FX PRO?
MIDI FX PRO is rated higher. SimplyPhaser averages 3.0 out of 5 from 1 ratings, while MIDI FX PRO averages 4.0 from 4 ratings.
Do SimplyPhaser or MIDI FX PRO have ads?
Neither SimplyPhaser nor MIDI FX PRO shows ads.
Which is updated more often, SimplyPhaser or MIDI FX PRO?
SimplyPhaser ships an update every 3 weeks, and MIDI FX PRO monthly. Most recently, SimplyPhaser was updated on October 4, 2026 and MIDI FX PRO on October 2, 2026.

Other comparisons