# Krill Synthesizer vs BTS FX

The clearest difference is update cadence: BTS FX at every 2 days against Krill Synthesizer's weekly. BTS FX also leads on price ($9.99 vs $11.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Krill Synthesizer costs $11.99 and BTS FX $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Krill Synthesizer against 5.0 for BTS FX. Both are backed by a comparable volume of ratings — 6 and 3 respectively.

Krill Synthesizer ships an update weekly, BTS FX every 2 days. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Krill Synthesizer | BTS FX |
| --- | --- | --- |
| Price | $11.99 | **$9.99** |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/krill-synthesizer/id6443337049/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/bts-fx/id6450247370/reviews) |
| Number of ratings | **6** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Paid | Paid |
| Size | 8 MB | 25 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Genuine Soundware](https://appshunter.io/developer/1560880481) | [Dmytro Kiro](https://appshunter.io/developer/1621893756) |

## What reviewers say

### Krill Synthesizer

[App page](https://appshunter.io/ios/app/krill-synthesizer/id6443337049)

This virtual analog polyphonic synthesizer offers a streamlined interface for creating quick synth sounds on iPad. It features two oscillators, an LFO, a low-pass filter, two envelopes, and stereo effects, all accessible from a single screen.

**Highlights:** Virtual analog polyphonic synthesizer, Single-screen interface, Two oscillators, One LFO, Low-pass filter, Stereo chorus and ping-pong delay, 64 presets

**Features:** Vision Pro support

**In-app purchases:** none


### BTS FX

[App page](https://appshunter.io/ios/app/bts-fx/id6450247370)

This audio effect plugin offers a versatile multi-effect suite for music production. It features a bitcrusher, distortion, reverb with a freeze function, and a limiter, all controllable within compatible DAWs.

**Highlights:** Bitcrusher with adjustable rate and bit, Distortion module with various algorithms, Reverb module with freeze function, Brick-wall limiter, Oversampling module (2x, 4x, 8x), Stereo/Mode processing, Parameter randomizer

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Krill Synthesizer free?

Krill Synthesizer costs $11.99, with no in-app purchases.

### Is BTS FX free?

BTS FX costs $9.99, with no in-app purchases.

### Which has better reviews, Krill Synthesizer or BTS FX?

Krill Synthesizer and BTS FX are both rated 5.0 out of 5 on the App Store, from 6 and 3 ratings respectively.

### Do Krill Synthesizer or BTS FX have ads?

Neither Krill Synthesizer nor BTS FX shows ads.

### Which is updated more often, Krill Synthesizer or BTS FX?

Krill Synthesizer ships an update weekly, and BTS FX every 2 days. Most recently, Krill Synthesizer was updated on November 3, 2026 and BTS FX on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*