Comparison

PolyBud Polyrhythmic Sequencer vs Callback Freeverb

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

Head to head
About

PolyBud Polyrhythmic Sequencer

Create complex musical sequences with multiple polyrhythmic tracks. Control note, velocity, gate, and MIDI CC parameters with independent step lengths and rates. Route MIDI output to your favorite synths and AUv3 hosts.

Highlights
  • Multitrack polyrhythmic MIDI sequencing
  • Note and MIDI CC tracks
  • Configurable step lengths per mode
  • Independent track rates
  • Assignable MIDI channels
  • Ramp value for CC smoothing
  • AUv3 plugin support
Features
Read full description

PolyBud is a multitrack polyrhythmic AUv3 MIDI sequencer. You can add multiple note or MIDI CC tracks to the each pattern. The note tracks has the note, velocity, gate, ratchet, probability and randomisation modes. You can set different step lengths to the each mode which would introduce polyrhythmic variations immediately. Another great feature is the each track can run in a different rate which is great for creating unique polyrhythmic sequences. Also, you can assign different MIDI channels to the each track so that you can control multiple synths within a single PolyBud pattern. The MIDI CC tracks is great for modulating the synth parameters. You can introduce polyrhythmic modulations by setting the different step lengths and different rates to your MIDI CC tracks. Also, you can set a ramp value for smoothing up the CC value changes per step. If you set the ramp value to 0% then you can have the classic sample and hold modulation. PolyBud is a MIDI app and it don't produce any sound of its own. You need to route PolyBud's MIDI out to your audio apps in order to run PolyBud. For the AUv3 plugin, you need an AUv3 host app such as AUM, Cubase, NanoStudio, ZenBeats, BeatMaker, apeMatrix etc.

About

Callback Freeverb

This app offers a classic algorithmic reverb effect based on the Freeverb algorithm. It adds depth, space, and atmosphere to audio sources, creating lush, spacious ambience. Designed for mono use, it provides a smooth, musical reverb tail suitable for vocals and synthesizers.

Highlights
  • Classic Freeverb algorithm
  • Schroeder/Moorer reverb topology
  • Comb and allpass filters
  • Mono operation
  • Adds depth and space to audio
  • Smooth, musical reverb tail
Features
Read full description

A classic algorithmic reverb effect based on the Freeverb algorithm by Jezar at Dreampoint. A Freeverb-style Schroeder/Moorer reverb based on the classic 8-comb + 4-allpass topology, with simplified controls and no stereo spread. This reverb creates lush, spacious ambience through a network of comb and allpass filters. Freeverb is widely used in electronic music production, ambient music, and sound design to add depth, space, and atmosphere to audio sources. The algorithm provides a smooth, musical reverb tail that works well on everything from vocals to synthesizers. This reverb only functions in mono and provides no stereo imaging, and the user can expect the same behavior as a classic Freeverb implementation otherwise.

Screenshots

PolyBud Polyrhythmic Sequencer4 screens
Callback Freeverb4 screens

Verdict

The call

The clearest difference is price: Callback Freeverb at Free against PolyBud Polyrhythmic Sequencer's $3.99. PolyBud Polyrhythmic Sequencer's advantage is ratings volume (9 vs 1) and iOS requirement (13.0 vs 17.0). On rating, 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

Callback Freeverb is free to download; PolyBud Polyrhythmic Sequencer costs $3.99 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 — 4.9 for PolyBud Polyrhythmic Sequencer against 5.0 for Callback Freeverb. That said, the two scores are not equally well evidenced: PolyBud Polyrhythmic Sequencer has 9 ratings behind it against 1, so its average is the more settled of the two.

Scorecard4 real differences · 6 level
PolyBud Polyrhythmic Sequencer versus Callback Freeverb: the parameters behind the verdict, then further details
ParameterPolyBud Polyrhythmic SequencerCallback Freeverb
Price$3.99Free — better
Rating4.9 (9 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings9 — better1
Update frequencyEvery 5 weeks—
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size7 MB7 MB
Age rating4+4+
DeveloperCem OlcayCallback Audio, LLC

Customer experience

PolyBud Polyrhythmic Sequencer

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Callback Freeverb

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PolyBud Polyrhythmic Sequencer

No in-app purchases

None

Callback Freeverb

No in-app purchases

Questions

Is PolyBud Polyrhythmic Sequencer free?
PolyBud Polyrhythmic Sequencer costs $3.99, with no in-app purchases.
Is Callback Freeverb free?
Callback Freeverb is free to download, with no in-app purchases.
Which has better reviews, PolyBud Polyrhythmic Sequencer or Callback Freeverb?
Callback Freeverb is rated higher. PolyBud Polyrhythmic Sequencer averages 4.9 out of 5 from 9 ratings, while Callback Freeverb averages 5.0 from 1 ratings.
Do PolyBud Polyrhythmic Sequencer or Callback Freeverb have ads?
Neither PolyBud Polyrhythmic Sequencer nor Callback Freeverb shows ads.

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