TriKey vs TfxEcho
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TriKey
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TriKey is a composer's keyboard Control other iPad synths or external MIDI hardware! Features: - 3 configurable Keyboards with the ability to control CC Messages by moving your fingers up / down - Global Key and Scales prevent you from ever playing a wrong note - Save and toggle Chords - Advanced CC Options for each keyboard - Save / Load your own presets - Individual MIDI Ports & Channels for each Keyboard
TfxEcho
This audio plugin offers a warm, dark echo effect inspired by analog delay units. It allows for adjustable delay times, feedback, and filters, with modulation capabilities and tempo syncing. The plugin captures high-frequency signals for a versatile sound.
- Echo and delay effect
- BBD-inspired delay lines
- Adjustable delay time (20-1200 ms)
- Feedback control (0-100%)
- Low-pass and high-pass filters
- Modulation rate and width
- Tempo sync
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TfxEcho is an echo effect AudioUnit Extension plugin. It uses delay lines which are inspired by BBD (bucket brigade device). BBD is used in various analog delay unit and is known for its warm and dark sound. The delay line uses fixed length buffer and an artificial clock to sample input signal in variable sampling rate. When the delay time is changed, the delay line can produce pitch change effect which is similar to the behavior of the BBD based analog delay unit. The delay line is inspired by BBD, but it is not emulation of the any particular BBD. Unlike the typical BBD based delay unit, frequency range of the delay line is not limited. The delay line is capable to capture signal in higher frequency up to about 22KHz. Features AudioUnit Extension - Delay Time: From 20 ms to 1200 ms - Feedback: From 0 % to 100 % - Adjustable lowpass filter and high-pass filter. - Modulation rate: From 0.01 Hz to 10 Hz - Modulation width: From 0 ms to +/- 10 ms - Delay time can be synced to tempo provided by the host application. Host Application Host application uses system audio input as an audio source and processed audio signal is routed to the system audio output.
Screenshots
Verdict
The clearest difference is price: TfxEcho at $4.99 against TriKey's $9.99. TfxEcho also leads on device support (3 vs 1). TriKey's advantage is update cadence (every 2 months vs every 3 months). 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
TriKey costs $9.99 and TfxEcho $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TriKey ships an update every 2 months, TfxEcho every 3 months. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.
| Parameter | TriKey | TfxEcho |
|---|---|---|
| Price | $9.99 | $4.99 — better |
| Rating | — | 4.7 (12 ratings) — better |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | — | 12 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.5 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcos Kohler | Ryo Togawa |
In-app purchases
TriKey
No in-app purchases
TfxEcho
No in-app purchases









