Comparison

AddStation vs MIDI World

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

Head to head
About

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.

Highlights
  • Fractal additive synthesis
  • Sound morphing
  • Over 170 sound presets
  • AUv3 AudioUnit integration
  • Built-in effects suite
  • Audiobus 3 and Ableton Link support
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

AddStation4 screens
MIDI World4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

AddStation costs $8.99 and MIDI World $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

AddStation ships an update weekly, MIDI World every 7 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
AddStation versus MIDI World: the parameters behind the verdict, then further details
ParameterAddStationMIDI World
Price$8.99$0.99 — better
Rating4.5 (42 ratings) — better2.0 (1 ratings)
Positive reviews82.1% of reviews — better0.0% of reviews
Number of ratings42 — better1
Update frequencyWeekly — betterEvery 7 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size133 MB14 MB
Age rating4+4+
DeveloperHarry GohsLos Palmos

Customer experience

AddStation

All ratings43 ratings
Positive88.4%
Neutral4.7%
Negative7.0%
Written reviews39 reviews
Positive82.1%
Neutral2.6%
Negative15.4%

MIDI World

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

AddStation

No in-app purchases

None

MIDI World

No in-app purchases

Questions

Is AddStation free?
AddStation costs $8.99, with no in-app purchases.
Is MIDI World free?
MIDI World costs $0.99, with no in-app purchases.
Which has better reviews, AddStation or MIDI World?
AddStation is rated higher. AddStation averages 4.5 out of 5 from 42 ratings, while MIDI World averages 2.0 from 1 ratings.
Do AddStation or MIDI World have ads?
Neither AddStation nor MIDI World shows ads.
Which is updated more often, AddStation or MIDI World?
AddStation ships an update weekly, and MIDI World every 7 months. Most recently, AddStation was updated on October 24, 2026 and MIDI World on October 25, 2026.

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