Comparison

Combustor vs Relic Flow

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

Head to head
About

Combustor

This audio effect extension transforms tracks with a unique time-bending resonator. Create vibrant textures, subtle resonances, and dynamic sweeps. It's designed for electronic musicians and producers seeking to add wild or organic qualities to their sounds.

Highlights
  • Time bending resonator effect
  • Creates distorted textures and physical resonance
  • Envelope follower for dynamic control
  • MIDI input for melodic control
  • Performative interface
  • AUv3 compatible
Features
Read full description

*** Note: Combustor is an Audio Unit effect extension and requires an AUv3 compatible host app, like Logic Pro, Drambo or GarageBand. It does not run as a standalone app *** Combustor is a unique, wild resonating body fashioned to spice up or extremely transform your tracks. At the heart of Combustor is a custom time bending resonator that doesn't sound like anything you have heard before. You can create anything from vibrant, distorted texture, perfectly suited for "hardcore" electronic musicians, to subtle physical resonance, which is often lacking in synthesized sounds. Combustor contains an envelope follower, to create dynamic-controlled pitch or filter sweeps. It also has MIDI input, that controls resonator's pitch, to make something melodic and organic out of non-melodic sounds, like drums. With just a few knob turns, a boring sound can be turned into screaming madness that sounds like it went out of control. A simple and straightforward interface makes Combustor a performative tool that allows you to directly interact with your sound.

About

Relic Flow

Generate unique Lo-Fi rhythms, noise patterns, and drum loops using advanced synthesis algorithms. Explore billions of sound samples with intuitive controls and real-time audio recording. Perfect for musicians and sound designers seeking endless creative possibilities.

Highlights
  • Lo-Fi rhythm and drum loop generation
  • Billions of unique sound samples
  • Real-time audio recording to WAV
  • Multiple input methods (on-screen, PC keyboard, MIDI)
  • Export to WAV, SunVox, and text clipboard
  • iOS Audio Unit Extension (AUv3) support
Features
Read full description

Relic Flow is a generator of Lo-Fi rhythms, noise patterns and drum loops based on unique synthesis algorithms from NightRadio. More than 4 billion samples from the depths of the Mathematical Universe! Features: * search for new sounds with three buttons: next random set, edit code, previous set; each set of 12 sounds corresponds to a code of 8 characters; * three types of keyboards for live performing: on-screen buttons, PC keyboard, MIDI input; * several processing parameters + control via MIDI; * real-time audio recording to WAV (32-bit); * export to: WAV (one file or a set), SunVox (samples + effects in one file), text clipboard; * the LCK button freezes individual samples - they will not change during the search for new sets; * iOS Audio Unit Extension (AUv3). Double clicking on a parameter opens a window for setting the exact value. If you enable the Hold option, the notes will play endlessly, without reacting to key release (noteOff) events; turning the note on again works like turning it off; there are two ways to enable this option: 1) using the Hold parameter in the "MIDI Mapping" window; 2) by pressing the HOLD button, which appears in place of LCK while playing the musical keyboard: press HOLD, release the desired notes - then the released notes will continue to play.

Screenshots

Combustor1 screens
Relic Flow2 screens

Verdict

The call

The clearest difference is update cadence: Combustor at every 2 months against Relic Flow's every 17 months. Relic Flow's advantage is price ($1.99 vs $4.99) and review sentiment (93% vs 80%). On rating, ratings volume, ads and in-app purchases 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

Combustor costs $4.99 and Relic Flow $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Combustor against 4.8 for Relic Flow. Both are backed by a comparable volume of ratings — 19 and 26 respectively. Written reviews are what separate them: 80% of Combustor's written reviews are positive against 93% of Relic Flow's.

UpkeepUpdate frequency

Combustor ships an update every 2 months, Relic Flow every 17 months. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.

Scorecard4 real differences · 6 level
Combustor versus Relic Flow: the parameters behind the verdict, then further details
ParameterCombustorRelic Flow
Price$4.99$1.99 — better
Rating4.7 (19 ratings)4.8 (26 ratings) — better
Positive reviews80.0% of reviews93.3% of reviews — better
Number of ratings1926 — better
Update frequencyEvery 2 months — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size4 MB6 MB
Age rating4+4+
DeveloperBeepStreetAlexander Zolotov

Customer experience

Combustor

All ratings19 ratings
Positive94.7%
Neutral0.0%
Negative5.3%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

Relic Flow

All ratings26 ratings
Positive96.2%
Neutral0.0%
Negative3.8%
Written reviews15 reviews
Positive93.3%
Neutral0.0%
Negative6.7%

In-app purchases

None

Combustor

No in-app purchases

None

Relic Flow

No in-app purchases

Questions

Is Combustor free?
Combustor costs $4.99, with no in-app purchases.
Is Relic Flow free?
Relic Flow costs $1.99, with no in-app purchases.
Which has better reviews, Combustor or Relic Flow?
Relic Flow is rated higher. Combustor averages 4.7 out of 5 from 19 ratings, while Relic Flow averages 4.8 from 26 ratings.
Do Combustor or Relic Flow have ads?
Neither Combustor nor Relic Flow shows ads.
Which is updated more often, Combustor or Relic Flow?
Combustor ships an update every 2 months, and Relic Flow every 17 months. Most recently, Combustor was updated on September 20, 2026 and Relic Flow on September 17, 2026.

Other comparisons