GRDelay vs Tapko
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GRDelay
This audio effect plugin creates unique sound textures by generating up to 16 stereo 'grains' from delayed input audio. It offers randomization of grain shape, delay time, and pitch-shifting for experimental sound design.
- Granular synthesis-based delay
- Up to 16 stereo grains
- Randomized grain shape and delay time
- Pitch-shifting and cascading grains
- Standalone and AUv3 compatible
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GRDelay - Granular Random Delay Plugin (AUv3) GRDelay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro or GarageBand. Overview - What's a Granular Random Delay? GRDelay is a randomised delay effect that uses a similar approach to granular synthesis to generate sound. In GRDelay, up to 16 "grains" of stereo sound are created in realtime from delayed copies of the input audio, with control over the grain shape and delay time. There are also options to pitch-shift grains up an octave, and cascade the output from one grain into another. Shape, delay time and pitch-shifting can all be randomised to create some really unusual effects and textures. While GRDelay can produce sounds similar to existing pitch-shifted delays and even shimmer effects, the design is totally original, and to the best of my knowledge, quite sonically unique. I think GRDelay is really one of those effects you need to hear to believe, so please do check out the reviews and demos online. Please note, because there's a "whole lot of random going on" in GRDelay, it's not a good choice if you want a delay that can do tempo / clock-sync'd rhythmic delays. Perhaps take a look at PolyDelay which offers tempo sync to host and musical note length delay times. For more info and support please visit: www.waverley-instruments.com/robjackson
Tapko
This app is a powerful drum sampler for musicians, offering a 16-pad grid for loading and manipulating sounds. It provides extensive per-pad editing, advanced sampling features like velocity layers and round robin, and seamless integration with music hosts.
- 16-pad grid with per-pad sample import
- Per-pad editing (EQ, pan, reverb)
- Velocity layers and round robin sampling
- MIDI Learn for instant assignment
- Built-in stereo reverb
- Kit creation, import, and export
- Multi-output routing
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Tapko is a fast, no-nonsense drum sampler built by a musician for musicians. Load your sounds, build your kit, and play — standalone or as an AUv3 plugin in your favorite host. Use Tapko on its own as a playable drum machine, or load it as an AUv3 instrument in AUM, Loopy Pro, GarageBand, Cubasis, and more. 16 PADS, TOTAL CONTROL • 16-pad grid with per-pad sample import (WAV, AIFF, MP3, M4A, FLAC, CAF) • Per-pad 3-band EQ with adjustable gain and frequency, volume, pan, gain, choke groups, and configurable Fade Out • Swipe pads to tweak volume, EQ, pan, reverb send, and delay send on the fly • MIDI Learn — tap a pad, play a note, instantly assign note and channel • Swipe left/right on single-sample pads to cycle saved versions • Tapko Space reverb — Room, Plate, Hall, and Cosmos, with Space, Decay, Pre-delay, Color, Clarity, and Modulation, plus per-pad send and dry level • Tapko Space delay — Clean, Warm, Diffuse, and Reverse, synced to your host's tempo (straight, dotted, or triplet) or free-running, with the option to send its echoes into the reverb • Reverb and delay presets — drum-focused factory presets plus your own, in every kit. Export and import them; shared kits sound the same anywhere • Varispeed pitch — retune a pad up or down turntable-style, or set pitch per velocity layer and round-robin sample • Let a pad's hits overlap and ring out instead of cutting each other off — perfect for cymbals and pads ADVANCED SAMPLING • Velocity layers — up to 5 layers per pad with adjustable velocity ranges • Round robin — cycle through up to 5 samples per pad (sequential or random) • Layer mode — stack up to 5 samples per pad and trigger them simultaneously • Random velocity — override incoming velocity with base +/- variation for natural dynamics • Sample Editor with a zoomable waveform and full-file overview, trim handles, start delay, attack, and gain. Play sounds exactly like hitting the pad • Render Pad — bounce a pad, with its trims, EQ, pitch, envelope, and layers (and optionally its reverb and delay), into a new sample. Save it to the Media Browser or put it straight back on the pad • Global media browser — import clips once and use them in any kit; nested folders, folder import, multi-select, and library export/import KITS & SHARING • Create, rename, duplicate, and delete kits • Import and export kits as .tapkokit files • Kit Store — browse and download free community kits • Full backup and restore of all kits, media, and effect presets to a single .tapkobackup file • iCloud backup — upload kits, media, and presets and restore them on another device. Later backups only upload what changed • Build kits on your computer at tapko.davidguva.se MULTI-OUTPUT ROUTING • 9 stereo output buses (1 Main + 8 Aux) for hosts that support multi-output • Assign each pad to an individual output bus for separate mixing and effects • Pads assigned to an Aux bus are isolated to that bus, so you can send drums to individual channel strips without duplicating them on Main • Single-output hosts hear every pad that's still assigned to Main • Pads routed to an Aux bus show which output they use right on the pad MIDI & HOST INTEGRATION • MIDI input with customizable note mapping (GM drum layout by default) • Per-pad MIDI channel assignment (omni or channel 1–16) • MIDI output and Program Change for kit switching • Pad parameters and the Mixer (main volume, reverb, delay) exposed to the host for automation • Delay syncs to the host's tempo • Reports its reverb and delay tails to the host, so they ring out after the last hit • Factory presets support BUILT FOR PERFORMANCE • Real-time C++ DSP engine with vDSP acceleration • 48-voice polyphonic playback with intelligent voice stealing • Efficient CPU usage; heavier kits (more layers, longer tails, more FX) use more STANDALONE & PLUGIN Tapko works as a standalone drum machine right out of the box. It also registers as an AUv3 instrument plugin so any compatible host can load it.
Screenshots
Verdict
The clearest difference is price: GRDelay at $1.99 against Tapko's $5.99. GRDelay also leads on device support (4 vs 2) and iOS requirement (12.0 vs 18.2). On rating, review sentiment, ratings volume and ads 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
GRDelay costs $1.99 and Tapko $5.99 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 GRDelay against 5.0 for Tapko. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | GRDelay | Tapko |
|---|---|---|
| Price | $1.99 — better | $5.99 |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 12 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Rob Jackson | David Lars Guva |
Customer experience
GRDelay
Tapko
In-app purchases
GRDelay
No in-app purchases
Tapko
No in-app purchases









