Comparison

AddStation vs Compositor NTP

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

Compositor NTP

Features
Read full description

Compositor NTP is a single solution for metronome and Ethernet education. It is a real-time device, which uses physical modeling as a source for NTP synchronous signal. Using the iOS version you can transform your iPhone into rhythm modeling station. You can adjust parameters visible on the screen using menus, dials and virtual keyboard. All of the dials smoothly interpolate for click-free performance. Compositor NTP is your entry point into the world of Ethernet communications. It dynamically updates the sound engine in accordance to IP address settings for three loopback channels. - Compositor NTP is an instrument that uses upper-level C++ programming, which makes it available as a pure 64-bit DSP application - First ever musical metronome with odometry - Convenient tempo and tone control - Natal chart of Constellations and month year cycle - Simulation of Solar System objects - Audio loopback and packet simulation - Telescope style control over reverberation channel

Screenshots

AddStation4 screens
Compositor NTP1 screens

Verdict

The call

The clearest difference is update cadence: AddStation at weekly against Compositor NTP's every 2 months. AddStation also leads on iOS requirement (12.0 vs 16.2). Compositor NTP's advantage is price ($2.99 vs $8.99). 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

CostPrice · In-app purchases · Ads · Monetization

AddStation costs $8.99 and Compositor NTP $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

AddStation ships an update weekly, Compositor NTP every 2 months. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
AddStation versus Compositor NTP: the parameters behind the verdict, then further details
ParameterAddStationCompositor NTP
Price$8.99$2.99 — better
Rating4.5 (43 ratings) — better—
Positive reviews82.1% of reviews—
Number of ratings43 — better—
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.2
Further details — not scored
Size133 MB4 MB
Age rating4+4+
DeveloperHarry GohsRuslan Yusipov

In-app purchases

None

AddStation

No in-app purchases

None

Compositor NTP

No in-app purchases

Questions

Is AddStation free?
AddStation costs $8.99, with no in-app purchases.
Is Compositor NTP free?
Compositor NTP costs $2.99, with no in-app purchases.
Do AddStation or Compositor NTP have ads?
Neither AddStation nor Compositor NTP shows ads.
Which is updated more often, AddStation or Compositor NTP?
AddStation ships an update weekly, and Compositor NTP every 2 months. Most recently, AddStation was updated on October 9, 2026 and Compositor NTP on October 3, 2026.

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