Stria vs RP
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...
RP
This app offers dual stereo delay lines for a vast array of audio effects, from simple echoes to complex soundscapes. It features individual bypass, modulation routing, and tempo synchronization options.
- Dual stereo delay lines
- High- and Lowpass filters
- Stereo spread and Looping
- Separate modulation delay
- Tempo sync via AudioUnit Host or Ableton Link
- Delay times from 10ms to 2000ms
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RP-1 - Dual Digital Delay FX Two separate (stereo) delay lines allow for a wide range of effects ranging from basic slapback and ping-ping type echos to complex modulations and soundscapes. * Overview - Digital Stereo Delay with High- and Lowpass filters, Stereo spread and Looping - Separate modulation Delay for Chorus, Vibrato, Flanger, Panning, Phaser & Tremolo effects - Both sections can be bypassed individually - Mod section can be routed pre or post delay - Delay Times from 10ms to 2000ms (or 1/32 to 2bars) - Tempo Sync via AudioUnit Host or Ableton Link - Tap Temp and Manual Tempo - Normal, Dotted and Triplet - Stereo Spread - Simple 1-Button Looping * Connections - AudioUnitV3 Effect - Inter-App Audio Effect - Audiobus (Filter) - Ableton Link - USB Audio Interface - Microphone
Screenshots
Verdict
The clearest difference is rating: Stria at 5.0 against RP's 3.9. Stria also leads on review sentiment (91% vs 70%). RP's advantage is update cadence (every 2 months vs every 6 months) and price ($5.99 vs $9.99). 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 RP $5.99 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 3.9. Both are backed by a comparable volume of ratings — 35 and 15 respectively. Written reviews point the same way: 91% of Stria's written reviews are positive against 70% of RP's.
Stria ships an update every 6 months, RP every 2 months. The most recent releases landed on October 21, 2026 and October 17, 2026 respectively.
| Parameter | Stria | RP |
|---|---|---|
| Price | $9.99 | $5.99 — better |
| Rating | 5.0 (35 ratings) — better | 3.9 (15 ratings) |
| Positive reviews | 91.5% of reviews — better | 70.0% of reviews |
| Number of ratings | 35 — better | 15 |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | Kai Aras |
Customer experience
Stria
RP
In-app purchases
Stria
No in-app purchases
RP
No in-app purchases
