TfxEcho vs AxeScales
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
AxeScales
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Learn the Major and Minor Scales on Guitar. Select from Heptatonic (7 Note), Hexatonic (6 Note), Pentatonic (5 Note), Blues (6 Note), or Arpeggios (3 Notes), from any Root Note, for each Major and Minor Scale. (A total of 120 different combinations!) Shows the Scale Degree of each note in the Scale, with the Root Notes of each Scale highlighted. Each note will play when clicked. Fret numbers are shown below the Fretboard.
Screenshots
Verdict
The clearest difference is update cadence: AxeScales at every 3 days against TfxEcho's every 3 months. AxeScales also leads on price ($1.99 vs $4.99). TfxEcho's advantage is iOS requirement (13.5 vs 16.2). On 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
TfxEcho costs $4.99 and AxeScales $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TfxEcho ships an update every 3 months, AxeScales every 3 days. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.
| Parameter | TfxEcho | AxeScales |
|---|---|---|
| Price | $4.99 | $1.99 — better |
| Rating | 4.7 (12 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.5 — better | 16.2 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryo Togawa | Joseph Svantner |
In-app purchases
TfxEcho
No in-app purchases
AxeScales
No in-app purchases









