Stria vs AltiSpace 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stria
This app is a multilevel interactive sound synthesizer that utilizes Frequency Modulation and Wavetable Additive techniques. It offers extensive control over oscillators, pitch grids, and effects, with support for various audio and MIDI connections.
- Multilevel interactive sound synthesizer
- Up to 240 FM or Wavetable Additive Oscillators
- Five Spectral Pitch Grid Generators
- MIDI Pad With Scale Grid
- Extensive effects chain (Doppler, Glitch Gen, Reverb, etc.)
- Snapshots Presets Morphing Pad
- Control Manager LFO for Parameters
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Stria is rated as a Killer App by Apps4iDevices. Multilevel Interactive Sound Synthesizer Idea and Csound-Orchestra by Eugenio Giordani “Stria” is the title of a very important composition by John Chowning and I would like to say that this computer music piece represents the manifest of Frequency Modulation technique applied to audio synthesis, invented by Mr. Chowning himself. + Audiobus and Inter-App Audio support + Up to 240 Frequency Modulation Oscillators or simple Wavetable Additive + Five Spectral Pitch Grid Generators (Geometric, Harmonic, Fibonacci, Scalar, Temperated) + MIDI Pad With Scale Grid + Effects chain: Doppler, Chopper, Glitch Gen, Sync Grain, Spectral Arpeggiator, FDN Reverb, Dynamic Compressor/Expander + Snapshots Presets Morphing Pad + Control Manager LFO for Parameters + Midibus, Virtual Midi and Network: 14 bit NRPN controllers + Capture Master Audio Output + File Manager, sharing common audio files via iTunes, Dropbox and AudioCopy + Post Fx Chain: Doppler, Chopper, Out Of Range, Sync Granulator, Spectral Arpeggiator, Reverb FDN, Dynamisc Processor + Bluetooth A2DP High Quality + etc...
AltiSpace 2
This app offers advanced convolution reverb with realistic acoustic simulations and famous hardware device presets. It allows users to import their own impulse responses and provides extensive controls for EQ, gating, modulation, and more to shape unique sounds.
- Import custom impulse response files
- Library of famous hardware reverb presets
- Advanced EQ, gate, and ducking controls
- Modulation and pitch shifting effects
- MIDI controller support
- Stereo and mono input processing
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AltiSpace is a convolution reverb app with advanced controls that provides realistic sounding natural acoustic space or the most famous reverb devices for any track or mix. A convolution reverb takes a captured sample (called an impulse response) from a real-world space or hardware and uses this to digitally simulate the reverberation of that space or device down to the last detail and nuance. Because it is sampled, not synthesized, convolution reverb is known for its stunning realism, and it is widely considered to be the best type of reverb. However, unlike the more common algorithmic reverbs, convolution reverbs usually does not have much control over the reverberation process. But AltiSpace, in addition to the ability to load your own impulse response files and a built-in library of real reverb device presets, has advanced settings such as EQ, gate, ducking, modulation and more. You can change the original impulse response parameters to something completely new and then save it as a new preset. This app has an easy-to-use user interface, where all the main controls are located on the single screen, and it is ready to use right out of the box, even without additional settings. And at the same time, you can easily change the parameters of the impulse responses from the built-in library to create your own sound. App features: Ability to import your own impulse response files. A large built-in library of presets from the most famous hardware reverbs. Convenient preset manager with the ability to group and search presets. Presets can be marked as favorites for display in the favorites group. Supports MIDI controllers (also Bluetooth) with learn or manually assign mode. Reverb can work with a stereo or mono input and convert it to stereo. Add dynamic noise before reverb for a more natural sound. The gate allows you to turn on the reverb when the threshold is exceeded. The ducking allows you to turn off the reverb when the threshold is exceeded. Sets the minimum reverb level for Gate and Ducking modes. Equalizer with high and low cut filters in chain before or after reverb. Changing the time (length) of the current impulse response. Possibility to set a fade out point for a smooth end of the impulse response. Sets the pre-delay time of the signal before reverb. Experimental feature to change the pitch of the impulse response. Amplifying early or late reflections. Adjusts the stereo image before the reverb. Haas effect for adding stereo space to a mono signal. Sets the depth and frequency of modulation the signal before reverb. Mixing dry / wet signal and adjusting the output level. Four-channel mode for better stereo ambience. Input and output level meters. Indicators of possible input clipping for standalone. Prevents any output clipping for standalone. Built-in full description of all controls. Demo: https://www.youtube.com/watch?v=WBHxgjkGCoU https://www.youtube.com/watch?v=GLNi9wHaGew https://www.youtube.com/watch?v=A3RPopor9gI AltiSpace is a universal application for iOS and macOS. It can work on iPhone and iPad as well as Mac / MacBook with M1 chip (and later). AltiSpace works on iPhone and iPad standalone, as an Audio Unit or Inter-App Audio module, and supports Audiobus. On MacOS, AltiSpace can works both as a standalone application and as an Audio unit (AUv3) with DAWs and other hosts that support AUv3 plugins. AltiSpace has a built-in detailed description of all parameters also available as PDF file on the application site. You can find more information on AltiSpace and other creative audio apps at: https://motion-soundscape.blogspot.com
Screenshots
Verdict
The clearest difference is update cadence: AltiSpace 2 at monthly against Stria's every 5 months. AltiSpace 2 also leads on chart position (#199 vs unranked) and price ($7.99 vs $9.99). Stria's advantage is rating (5.0 vs 4.7) and review sentiment (91% vs 78%). On ratings volume, ads, in-app purchases and monetization model 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
Stria costs $9.99 and AltiSpace 2 $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Stria holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 35 and 29 respectively. Written reviews point the same way: 91% of Stria's written reviews are positive against 78% of AltiSpace 2's.
Stria ships an update every 5 months, AltiSpace 2 monthly. The most recent releases landed on August 31, 2026 and September 19, 2026 respectively.
| Parameter | Stria | AltiSpace 2 |
|---|---|---|
| Price | $9.99 | $7.99 — better |
| Rating | 5.0 (35 ratings) — better | 4.7 (29 ratings) |
| Positive reviews | 91.1% of reviews — better | 77.8% of reviews |
| Number of ratings | 35 — better | 29 |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #199 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.4 — better |
| Further details — not scored | ||
| Size | 19 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | Igor Vasiliev |
Customer experience
Stria
AltiSpace 2
In-app purchases
Stria
No in-app purchases
AltiSpace 2
No in-app purchases









