apeDelay vs isxynth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
apeDelay
This audio effect app transforms sound by converting it to the frequency domain for manipulation, then back to the time domain. It offers advanced spectral effects like blur, granulation, and filtering, with extensive control over delay lines and feedback.
- Spectral delay with up to 2048 lines
- STFT analysis/re-synthesis
- Spectral Blur, Granulate, Decimator, Freeze
- Brick-wall filters
- AudioUnit V3 (FX) and Inter-App Audio (FX) support
- Audiobus (Full) and Ableton Link integration
- Built-in Stereo Sampler
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apeDelay - spectral Delay implements up to 2048 delay lines with feedback or up to 2048 Brick-wall filters. The algorithm is based on the STFT (i.e. Short Time Fourier Transform) analysis/re-synthesis. The audio signal is converted in abstract ‘Frequency Domain’, where is manipulated and transformed back again in ‘Time Domain’. You can draw the Time and Feedback shapes for both stereo channels. This is achieved from the multi sliders, who provide a great tool to manage the huge numbers of parameters. You can also benefit of more advanced spectral manipulations like the Spectral Blur, Granulate, Bins Decimator, Noise Gate, Spectral Freeze and Brick-wall filters. + AudioUnit V3 (FX) + Inter-App Audio (FX) + Audiobus (Full) + Ableton Link + Audio Interface support + Microphone input + Built In Stereo Sampler with varispeed and scrubbing + Control Manager LFO for all the Parameters + Midibus, Virtual Midi and Network: 14 bit NRPN controllers + Sample Manager, sharing common audio files via iTunes, Dropbox and AudioCopy + Snapshots Presets Morphing Pad + Post Fx: Stereo Delay, Amazing ClassicVerb Low/Hi Shelving and Dynamic Processor + etc...
isxynth
This music effect plugin allows spectral cross synthesis and morphing between two input signals. It separates noise and tone components, offering controls for blending, freezing, and time-based delays. Gestures on controls can be recorded and played back for dynamic sound shaping.
- Spectral cross synthesis
- Morphing between two input signals
- Noise and tone component blending
- Freeze control for spectral blurring
- 3-second delay lines per input
- Gesture recording and playback
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isxysnth is spectral cross synthesis / morphing plugin it gets two input signals, splits each one into 2 parts containing noise and tone components and then allows morphing between all these elements. Freeze control allows spectral blurring-like effect for both input signals, two 3 second delay lines allow selection of different signal in time and also provide "freeze" effect you can process left and right channels on stereo source or use this effect as multi-input AUv3 - in that case it will use 2 stereo inputs. Standalone mode currently works only in "mono" mode - three XY controls set balance between tone and noise components, amount of freeze and set up morphing - both inputs have 3-second delay line; freeze button ("*") toggles off recording. - gestures on all the main controls (3 xy pads and two sliders) can be recorded and played back when appropriate button with ">" label is toggled on - in current version standalone app supports only mono (L + R as inputs I and II) processing
Screenshots
Verdict
The clearest difference is rating: apeDelay at 4.6 against isxynth's 3.7. apeDelay also leads on update cadence (every 4 months vs every 34 months) and ratings volume (17 vs 3). isxynth's advantage is review sentiment (100% vs 88%) and iOS requirement (11.0 vs 17.0). On price, ads, in-app purchases and monetization model 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
apeDelay costs $7.99 and isxynth $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
apeDelay holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: apeDelay has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 88% of apeDelay's written reviews are positive against 100% of isxynth's, so the app with the better star average is not the one people write more warmly about.
apeDelay ships an update every 4 months, isxynth every 34 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | apeDelay | isxynth |
|---|---|---|
| Price | $7.99 | $7.99 |
| Rating | 4.6 (17 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 87.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 17 — better | 3 |
| Update frequency | Every 4 months — better | Every 34 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | Alexey Nadzharov |
Customer experience
apeDelay
isxynth
In-app purchases
apeDelay
No in-app purchases
isxynth
No in-app purchases
