MIDIWriter vs Teraverse
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MIDIWriter
This app transforms keyboard input into musical notes and sounds. Type characters to instantly generate MIDI messages, or input phrases to create musical sequences with adjustable tempo and looping. It includes a built-in sound engine and supports external MIDI devices and apps.
- Text to MIDI conversion
- Built-in General MIDI sound engine
- Phrase playback with tempo control
- Drum mode with multiple kits
- External MIDI output
- Hardware keyboard support
- Wi-Fi MIDI networking
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[[ A STRANGE MUSIC TOOL FOR MANIAC MUSIC LOVERS! ]] MIDIWriter is a unique app that converts keyboard input into MIDI note messages. Each character you type instantly produces sound. You can also enter a phrase and play it back as a sequence with adjustable tempo and loop options. KEY FEATURES: Built-in Sound Engine: No external app required! MIDIWriter includes a built-in General MIDI sound engine with 128 instruments and 9 drum kits. Just type and hear the sound immediately. Phrase Playback: Enter any text and play it as a musical sequence. Adjust the tempo (1-480 BPM), enable loop mode, and let your words become music. Space characters can be used as rests. Drum Mode: Switch to drum mode to play percussion sounds. Choose from 9 GM drum kits including Standard, Room, Power, Electronic, 808/909, Jazz, Brush, and Orchestral. MIDI Output: Send MIDI to other apps or external devices. Configure MIDI channel (1-16), program change (0-127), and destination. Works with Virtual MIDI and MIDI Network Session. Can be used simultaneously with the built-in sound engine. Keyboard Support: Use the on-screen software keyboard, or connect a Bluetooth/USB hardware keyboard for a real typing experience. Supports Japanese input with proper IME handling. MIDI Network Session: Connect to Mac or other iOS devices over Wi-Fi to control CoreMIDI-compatible sound generators remotely. Dark Mode & Rotation: Full support for light and dark modes. Works in portrait and landscape orientations on both iPhone and iPad. Note: Playback stops when the app goes to background. Using the Built-in Sound: Simply launch MIDIWriter and start typing. Each key produces a unique sound based on its character code. Enable drum mode in Settings for percussion sounds. Using with External MIDI Apps (Virtual MIDI): 1. Open a CoreMIDI sound generator app. 2. In MIDIWriter Settings, turn on "MIDI Output" and select the destination. 3. Type any key to hear sound from the external app. Using with Mac (MIDI Network Session): 1. Connect iPhone and Mac to the same Wi-Fi network. 2. Open MIDIWriter on iPhone. 3. On Mac, open "Audio MIDI Setup" and configure Network MIDI. 4. Connect your iPhone to the session. 5. Open a CoreMIDI app on Mac and select the network session as MIDI input. 6. Type on MIDIWriter to play sounds on Mac. Credits: Built-in sound engine uses "GeneralUser GS" SoundFont by S. Christian Collins. https://schristiancollins.com/generaluser.php
Teraverse
Explore and manipulate sounds from a powerful polysynth. This companion app allows you to adapt existing sounds with simple parameters or discover entirely new sonic territories using a unique morphing engine. It offers extensive sound design capabilities for musicians.
- Sound exploration and adaptation
- Unique morphing engine
- Access to all Tera Pro sounds
- 128 voice polysynth
- MIDI Polyphonic Expression (MPE)
- 1800+ factory presets
- Standalone, AUv3, and IAA compatible
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Teraverse - The companion player for Tera Pro Explore the vast sound universe of Tera Pro sounds with this companion App. Have access to all sounds of Tera Pro and adapt them to your taste with a couple of parameters defining the primary attributes of its defining inner structure without being distracted from the complex modular polysynth beneath. Expand Tera Pro's sound universe with the unique morphing engine capable of extruding all subtleties in between two arbitrarily chosen sounds by using the modulation wheel or dragging your finger across the onscreen keyboard. Use the dice button to beam yourself into another part of the sound universe and enter territory no one else was there before. - 128 voice Polysynth - Tera Pro engine inside - All Sounds of Tera Pro - MIDI Polyphonic Expression (MPE) - Vintage voice modelling for organic warm sound character - 1800+ Factory presets included - Standalone, AUv3 and IAA compatible - Ableton Link - Bluetooth MIDI
Screenshots
Verdict
The clearest difference is review sentiment: Teraverse at 83% against MIDIWriter's 0%. Teraverse also leads on rating (4.8 vs 1.5) and update cadence (every 4 weeks vs every 35 months). MIDIWriter's advantage is price ($0.99 vs $2.99). 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
MIDIWriter costs $0.99 and Teraverse $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Teraverse holds the better App Store score, 4.8 against 1.5. That said, the two scores are not equally well evidenced: Teraverse has 112 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of MIDIWriter's written reviews are positive against 83% of Teraverse's.
MIDIWriter ships an update every 35 months, Teraverse every 4 weeks. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.
| Parameter | MIDIWriter | Teraverse |
|---|---|---|
| Price | $0.99 — better | $2.99 |
| Rating | 1.5 (2 ratings) | 4.8 (112 ratings) — better |
| Positive reviews | 0.0% of reviews | 83.3% of reviews — better |
| Number of ratings | 2 | 112 — better |
| Update frequency | Every 35 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 330 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayuki Akamatsu | Harry Gohs |
Customer experience
MIDIWriter
Teraverse
In-app purchases
MIDIWriter
No in-app purchases
Teraverse
No in-app purchases
Questions
Is MIDIWriter free?
Is Teraverse free?
Which has better reviews, MIDIWriter or Teraverse?
Do MIDIWriter or Teraverse have ads?
Which is updated more often, MIDIWriter or Teraverse?
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