AddStation vs MIDI World
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AddStation
Explore new sonic territories with this advanced additive synthesis tool. Create complex timbres by combining thousands of sine waves and unique morph sequencing. Integrate seamlessly with iOS production environments and enjoy a suite of built-in effects.
- Fractal additive synthesis
- Sound morphing
- Over 170 sound presets
- AUv3 AudioUnit integration
- Built-in effects suite
- Audiobus 3 and Ableton Link support
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The next generation of additive synthesis Additive synthesis is a sound synthesis technique that creates timbre by adding sine waves together. The timbre of musical instruments can be considered to consist of multiple harmonic or inharmonic partials or overtones. VirSyn already has a remarkable track record of products ( CUBE, POSEIDON ) trying to make this virtually unlimited synthesis method manageable for creative sound designers and musicians. AddStation is the next step forward giving you a tool to explore completely new sonic territory. The massive amount of sine waves in AddStation - thousands per voice - together with unique morph sequencing blocks blur the frontiers between analog and digital sonic realms. And all this integrated in all relevant iOS production environments especially the emerging AUv3 AudioUnit standard. Synthesis • Fractal additive synthesis • over 170 sound presets • Four parts with 8 Additive Sequence Blocks • Sound morphing • up to 512 partials per voice with independent AD envelopes • harmonic/inharmonic spectra • Ringmodulation • arbitrary filter function and noise spectra • four independent analog style Arpeggiators Effects • Chorus • Phaser • Flanger • Overdrive • Parametric EQ • Echo/Delay • Reverb Global • AUv3 for Host integration • Audiobus 3 compatible (Input slot) with state saving • Support for Ableton Link. • Inter-app audio compatible (Instrument/Generator) • CoreMIDI / Virtual MIDI • Audio recorder.
MIDI World
Transform device sensors and real-world data into MIDI control and musical notes. Create multitrack recordings, adjust performances with per-track controls, and export to any DAW. Connect environmental data to your music.
- Sensor-to-MIDI mapping
- Real-world data integration
- Multitrack recording
- Per-track performance controls
- Standard MIDI File export
- Optional audio export
- Preset and theme customization
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MIDIWorld turns sensors and live data into MIDI control and notes. Map accelerometer, gyroscope, compass, GPS, barometer, microphone level, touch, light, proximity, and device motion into your performances. Layer weather, air quality, tides, visibility, seismic activity, place density, and market or FX-style feeds where available. Record multitrack sessions, adjust each source with per-track controls, and preview what you captured. Export Standard MIDI Files to use in any DAW or hardware that accepts MIDI. Optional audio export is available where the app supports it. Presets help you start quickly — from motion and tilt to weather, urban, health-driven, and experimental setups. Themes keep the interface comfortable for studio or stage. Permissions (Motion, Microphone, Location — including background when your session needs it — Health, Bluetooth) are used only to drive MIDI and related features on your device, as described in the system prompts and in our Privacy Policy. Whether you are sonifying a ride, the forecast, or generative patches from your environment, MIDIWorld connects world data to music.
Screenshots
Verdict
The clearest difference is review sentiment: AddStation at 82% against MIDI World's 0%. AddStation also leads on rating (4.5 vs 2.0) and update cadence (weekly vs every 7 months). MIDI World's advantage is price ($0.99 vs $8.99). On ads, in-app purchases, monetization model 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
AddStation costs $8.99 and MIDI World $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AddStation holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: AddStation has 42 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 82% of AddStation's written reviews are positive against 0% of MIDI World's.
AddStation ships an update weekly, MIDI World every 7 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | AddStation | MIDI World |
|---|---|---|
| Price | $8.99 | $0.99 — better |
| Rating | 4.5 (42 ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 82.1% of reviews — better | 0.0% of reviews |
| Number of ratings | 42 — better | 1 |
| Update frequency | Weekly — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 133 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | Los Palmos |
Customer experience
AddStation
MIDI World
In-app purchases
AddStation
No in-app purchases
MIDI World
No in-app purchases









