Comparison

rrarrow vs Sound Terrain

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

Head to head
About

rrarrow

Create experimental audio effects with extended feedback capabilities. This modular noise machine offers a simplified interface for fast assembly and flexible connectivity, allowing you to control processing parameters with the audio signal itself.

Highlights
  • Modular audio effect processing
  • Extended feedback capabilities
  • 20 audio processing blocks
  • Built-in audio recorder
  • MIDI controller support
  • Audiobus and Inter-App Audio support
  • Background audio playback
Features
Read full description

rrarrow is the experimental noise machine / modular audio effect for the iOS featuring extended feedback capabilities. Key features: - Simplicity. The interface is simplified for faster assembly and more flexible connectivity — you can assemble your effect very fast and control all the processing parameters with the audio signal! - Feedback capabilities. You can add feedbacks to the audio chain to get some chaotic noise sounds . - 20 blocks for audio processing: - Sine generator. Basic oscillator with sine waveform - Saw and square oscillators - Signal multiplier - Delay - Frequency shifter - Envelope follower - “Lorenz attractor” - Quantizer - Sample-and-hold - Reverb - Special Lowpass filter - Clipper - Nonlinear shaper (for self-oscillating circuit) - two special waveshaping modules with “fold” and “wrap” distortion blocks that work with audiofiles: - lookup table. Loads up to 10 seconds of audiofile to be used as nonlinear transfer function - Players with/without interpolation and speed control - "scrub" block for semi-random granular file playback - Built-in audio recorder. Share the audio file to other applications or AudioShare. - MIDI support! Assign MIDI controllers to all faders. Supports network midi and has a virtual MIDI in. - Audiobus support. Now you can stream live audio directly to other Audiobus-compatible apps! See http://audiob.us for more information. Works as input and filter. - Audiobus state saving support - Inter-App Audio support - Background audio support: enabled when connected to Audiobus and user switchable otherwise. The 'background audio" switch is located in app's "settings" page iPad2/iPhone4S or newer is recommended for complex presets this app is optimized for iPad and iPhone 5 To get started please watch the tutorial videos on the website and read the user guide inside the app

About

Sound Terrain

Features
Read full description

Sound Terrain turns a field of colored cells into a small instrument. Tap to switch notes on and off, brush across the surface to strum, or hold to capture up to eight seconds of sound and release it across the terrain. Explore dust, wind, clicks, drones, bells and plucks. Spread two fingers to reshape a short tape loop. Draw an L for an echo, or trace a circle to leave a repeating phrase. Double-tap to mute a sound type. Your samples return as scattered grains, reverse playback and vocoder-like textures. Use rec to record a performance, then save or share the audio. Tilt your iPhone to send particles through the field, or enable camera brightness control to change speed and pitch by covering and uncovering the lens. Choose a palette or let colors follow the time of day. English and Chinese interfaces are included. Sound synthesis and recording work offline. No account, advertising or subscription. Microphone, camera and motion controls are optional. Samples are temporary and cleared by reset or closing the app process; exported performances remain wherever you save them. Playback pauses in the background.

Screenshots

rrarrow3 screens
Sound Terrain4 screens

Verdict

The call

The clearest difference is update cadence: Sound Terrain at every 11 days against rrarrow's every 4 weeks. Sound Terrain also leads on price ($1.99 vs $3.99). rrarrow's advantage is device support (4 vs 2). On ads, in-app purchases and iOS requirement 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

rrarrow costs $3.99 and Sound Terrain $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

rrarrow ships an update every 4 weeks, Sound Terrain every 11 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
rrarrow versus Sound Terrain: the parameters behind the verdict, then further details
ParameterrrarrowSound Terrain
Price$3.99$1.99 — better
Rating4.6 (18 ratings) — better—
Positive reviews81.3% of reviews—
Number of ratings18 — better—
Update frequencyEvery 4 weeksEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size29 MB3 MB
Age rating4+4+
DeveloperAlexey Nadzharov弢 张

In-app purchases

None

rrarrow

No in-app purchases

None

Sound Terrain

No in-app purchases

Questions

Is rrarrow free?
rrarrow costs $3.99, with no in-app purchases.
Is Sound Terrain free?
Sound Terrain costs $1.99, with no in-app purchases.
Do rrarrow or Sound Terrain have ads?
Neither rrarrow nor Sound Terrain shows ads.
Which is updated more often, rrarrow or Sound Terrain?
rrarrow ships an update every 4 weeks, and Sound Terrain every 11 days. Most recently, rrarrow was updated on November 1, 2026 and Sound Terrain on October 31, 2026.

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