Krill Synthesizer vs BTS FX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Krill Synthesizer
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.
- Virtual analog polyphonic synthesizer
- Single-screen interface
- Two oscillators
- One LFO
- Low-pass filter
- Stereo chorus and ping-pong delay
- 64 presets
Read full descriptionHide full description
The GSi Krill Synthesizer was born from a design originally conceived to work as a mono synthesizer on an embedded processor (RP2040), then it was modified to be polyphonic for a more powerful processor (ARM H7) and finally we thought it would be perfect as a AUv3 for iPad, for those quick and dirty synth sounds you sometimes need without getting lost in endless parameter navigation and menu diving. So here it is, just one screen, one knob - one function, what you see is what you get. Two oscillators, one LFO, one low pass filter, two envelopes, stereo chorus, ping-pong delay, 64 presets. Have fun!
BTS FX
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.
- 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
Read full descriptionHide full description
BTS FX emerges as a dynamic multi-effect plugin, incorporating a diverse set of modules. Available on as Auv3 audio effect or can be loaded in IAA. App requires compatible Auv3 or IAA host (DAW) to load an effect. Among its Main features are: Pre/Post Moog Ladder Filter Bitcrusher with adjustable Rate and Bit controls Distinctive Distortion Module offering various reshaping algorithms. The plugin boasts a lush Reverb Module with a unique Freeze function , complemented by a Brick-wall Limiter Module and convenient Input/Output Gain adjustments. Additionally the Oversampling module provides 2x, 4x, and 8x factors, featuring both polyphase allpass IIR and FIR versions with latency compensation. Further enhancing its capabilities, BTS includes Stereo/Mode processing and a Parameter Randomiser for added creative exploration. Preset Manager, etc.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Krill Synthesizer | BTS FX |
|---|---|---|
| Price | $11.99 | $9.99 — better |
| Rating | 5.0 (6 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | 3 |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 8 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Genuine Soundware | Dmytro Kiro |
Customer experience
Krill Synthesizer
BTS FX
In-app purchases
Krill Synthesizer
No in-app purchases
BTS FX
No in-app purchases







