Midiflow vs mfxConvert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Midiflow
This app enables seamless MIDI data transfer between different applications on your device. It allows for app synchronization, routing MIDI from sequencers to synths, and assigning keyboard zones. Users can save and recall configurations, and monitor MIDI activity.
- App-to-app MIDI routing
- MIDI clock synchronization
- Channel filtering and remapping
- Note and velocity manipulation
- Custom virtual MIDI ports
- Preset saving and recall
- Controller filtering and remapping (in-app purchase)
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Midiflow allows you to send MIDI from app to app in a similar way to what you already do with audio. That way, you can sync apps with each other or send MIDI parts from a sequencer app to different synth apps. You can also route the MIDI from your keyboard to apps and assign different key zones to them. Different settings can be stored as a preset, recalled later and inserted into another preset. Furthermore, all MIDI transfer can be monitored in order to find problems or just to learn what MIDI is doing (normally) behind the scenes. Important news: There is a full documentation on the Midiflow website now! HOW DOES IT WORK? Midiflow allows you to create multiple routings. Each routing receives MIDI data on its source and sends it to its destination. The selectable sources and destinations include your CoreMIDI compatible MIDI interface and other apps if they provide a virtual MIDI port. You can also create custom ports that can be used by other apps to receive data from Midiflow or send data to it. A routing also has a modifier which allows you to filter data or modify it. That way, you can transpose notes, limit them to a key range, change the MIDI channel of the incoming data, etc. (see the feature list below). LIST OF FEATURES + MIDI clock – specify tempo and your apps will be in sync + Channel filtering and remapping + Velocity filtering – a routing is only active for notes in a given velocity range + Note shift – shift all notes by a given number of half-tone steps + Note remapping – shift each note individually + Velocity remapping – apply a velocity curve, transform to fixed velocity, or specify the map value by value. In the latter case, you can also export the mapping to the clipboard, edit it in another app like Apple Numbers, and paste it back in Midiflow + Filtering out Clock or dividing the tempo into subdivisions + Filtering out SysEx + Connect to other iPads/iPhones via Bluetooth MIDI (iOS8 or higher) + Save a configuration as a preset, which can be recalled later or inserted into another preset + Custom virtual MIDI ports, which can be selected in other apps as a source or destination + Control aspects of Midiflow via MIDI. For example, select presets or control the clock with any MIDI command + Launch your synth apps from Midiflow (works with an increasing number of apps) + Sharing your configurations ADDITIONAL FEATURES (available as an In-app purchase) + Filtering and remapping of controllers – transform (a) the controller type, e.g. from CC1 to pitch-bend or note value to CC1, and (b) transform the value in several ways: as a linear remapping from an input range to an output range, as a curve, or as a value by value list. In the latter case, you can also export the mapping to the clipboard, edit it in another app like Apple Numbers, and paste it back in Midiflow. This allows you to create very sophisticated remappings. + Controller conditions – adjust your routings depending on other MIDI messages. This allows you to create sophisticated behavior within your setup by switching routings on and off. DOES MIDIFLOW WORK WITH MY SYNTH APPS? Midiflow works with every app that has a correct MIDI implementation. In the best case, it has an own virtual MIDI port and can be configured so that it receives MIDI only on that port. Unfortunately, some apps don't have that, but can at least be restricted to one MIDI channel. In that case, you can send to that channel on the global MIDI port "Network Session 1". If you can't select a channel either, then the app won't work with Midiflow. There is a tutorial video on www.midiflow.com that explains this in more detail.
mfxConvert
This real-time MIDI event converter allows for simple or sophisticated remapping of various MIDI message types. Create multiple conversion setups within a single utility for flexible music production workflows.
- Real-time MIDI event conversion
- Supports various MIDI message types
- Pitch bend to controller conversion
- Note velocity to channel pressure conversion
- Create multiple conversion setups
- AUv3 and CoreMIDI compatible
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* INTELLIGENT MIDI CONVERTER * (AUv3 and CoreMIDI Effect) mfxConvert is a plugin for converting MIDI events in real time. It can be used for simple channel, note or controller remaps. However, it can also handle sophisticated conversions of event types, for example pitch bend to controller or note velocity to channel pressure. See below for the supported conversions. Simple to operate yet a very effective tool to have at your disposal. Create as many separate conversions as you need inside the one utility. Conversions supported: - note -> note, aftertouch, controller, program change, channel pressure, pitch bend or system realtime - aftertouch -> aftertouch, controller or channel pressure - controller -> note, aftertouch, controller, program change, channel pressure, pitch bend or system realtime - program change -> note, controller, program change or system realtime - channel pressure -> controller, channel pressure or pitch bend - pitch bend -> controller, channel pressure or pitch bend - system realtime -> controller, program change or system realtime * ABOUT mfxSeries * mfxSeries is a set of compact but powerful plugins for CoreMIDI or AUv3 hosts. Covering a range of use cases from common everyday MIDI manipulation tasks to creatively ambitious effects. Each plugin in the mfxSeries can be controlled and automated from the host as all controls are exposed as AUv3 parameters. mfxSeries plugins are built using the MidiBus library - http://midib.us
Screenshots
Verdict
The clearest difference is rating: Midiflow at 4.0 against mfxConvert's 3.3. Midiflow also leads on update cadence (every 5 weeks vs every 3 months) and ratings volume (39 vs 7). mfxConvert's advantage is in-app purchases (none vs 3) and price ($2.99 vs $7.99). On review sentiment, ads, device support and iOS requirement 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
Midiflow costs $7.99 and mfxConvert $2.99 up front. Midiflow sells 3 one-off in-app purchases. mfxConvert asks for nothing beyond the download.
Midiflow holds the better App Store score, 4.0 against 3.3. That said, the two scores are not equally well evidenced: Midiflow has 39 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 59% of Midiflow's written reviews are positive against 56% of mfxConvert's.
Midiflow ships an update every 5 weeks, mfxConvert every 3 months. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.
| Parameter | Midiflow | mfxConvert |
|---|---|---|
| Price | $7.99 | $2.99 — better |
| Rating | 4.0 (39 ratings) — better | 3.3 (7 ratings) |
| Positive reviews | 58.8% of reviews — better | 55.6% of reviews |
| Number of ratings | 39 — better | 7 |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 | 9.0 |
| Further details — not scored | ||
| Size | 4 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Johannes Doerr | Audeonic Apps |
Customer experience
Midiflow
mfxConvert
Bugs and requests
Midiflow
Reported bugs
45 issues- Frequent crashes while editing CC map
- Mapped CCs dropped during performance
- App does not open on iOS 10
- Layout issues on iPhone 11 (no 'Done' button)
- App stops working, opens for 2 seconds then closes
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- Bug in Velocity remapping: 'Reset curve' makes screen blank
- Note Off messages have vel value = 0
- App simply doesn't start after paid updates
- No 'Done' or 'Back' button visible in menus
- App crashes when editing a song and saving
- Edits lost after crash
- Backup song lost after crash
- App crashes when trying to remap
- App crashes on first note when Roli Seaboard is connected
- App closes when searching for nearby devices
- App closes when selecting 'find nearby devices' or 'advertise device'
- App doesn't work with iOS 14
- App doesn't work with iOS 15
- App doesn't work with iOS 16
- App crashes on iPad 5 after update
- App closes immediately after starting
- No back or cancel button, stuck in menus
- CC control mapping issues (e.g., CC7 dropped)
- Bluetooth connectivity crashes the app
- Program Change to MIDI note remapping not working
- App doesn't search for nearby devices
- App force closes when remapping
- GUI problems with returning to main page
- App crashes on first note
- App doesn't load after paid updates
- No return button
- Layout issues on iPhone
- Filter out Note Off messages functionality missing
- Frequent crashes while editing
- Mapped CCs dropped during performance
- Note off velocities are ignored
- App doesn't open
- App closes immediately
- App doesn't work with SampleTank in background
- Remapping doesn't work properly
- MIDI messages blocked or morphed
- Remapping adds code instead of replacing
- Fixed MIDI channels in Korg iPolysix
- Does not work with Arturia iMini/iProphet
- App shutdown on iPad 2
Requested features
6 requests- AUv3 plugin version
- Mass sharing of songs
- Dark mode
- Ability to map multiple notes from one key press
- Individual transpose for split zones
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- More MIDI features controllable by external hardware
mfxConvert
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Midiflow
- Send Controller On Load$1.99
- Controller Conditions$2.99
- Controller Remapping$3.99
mfxConvert
No in-app purchases
Questions
Is Midiflow free?
Is mfxConvert free?
Which has better reviews, Midiflow or mfxConvert?
Do Midiflow or mfxConvert have ads?
Which is updated more often, Midiflow or mfxConvert?
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