apeFilter vs K7D
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
apeFilter
This app offers advanced audio equalization with up to 36 peak filters and spectral grid compilers for precise sound sculpting. It supports various audio input methods and includes effects like reverb and delay.
- 36 Peak Filters
- Spectral Grid Compilers
- AudioUnit V3 & Inter-App Audio Support
- Built-in Stereo Sampler
- ClassicVerb and Delay FX
- MIDI Control
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apeFilter is a sophisticated Equaliser, the DSP is based on the Biquad/Cascade filters, very fast! The graphical interaction provides a great tool to design an extremely precise and smooth frequency response by directly manipulating up to 36 Peaks Filters. The Spectral Grid compilers increase the complexity and coherence between the filters bandwidth space. You can create your pitch space by the way of four different criteria of construction by determining a pitches grid: Fibonacci, Harmonic, Geometric and Scalar. Use apeFilter for sculpt your sound through the embedded sampler or LIve from Audiobus or Inter-Audio-App Input. Among the FX chain, an amazing ClassicVerb is available. + AudioUnit V3 (FX) + Inter-App Audio (FX) + Audiobus (Full) + Ableton Link + Audio Interface support + Microphone input + 72 Peak Filters for Spectral Grid Compilers + 4 Spectral Grid Compilers: Fibonacci, Harmonic, Geometric and Scalar + 6 Common Filters: Lowpass, Hipass, Bandpass, Notch, Lowshelf, Hishelf + MIDI Note On/Off messages, for playing Filters Frequency and Filters Peaks Gain + Audiobus and Inter-App Audio support (sender and FX) + Built In Stereo Sampler with varispeed + Control Manager LFO for Parameters + Midibus, Virtual Midi and Network: 14 bit NRPN controllers + File Manager, sharing common audio files via iTunes, Dropbox and AudioCopy + Snapshot Presets Morphing Pad + Post Fx Chain: Stereo Delay, Amazing ClassicVerb and Dynamic compressor/expander
K7D
This app offers a vintage tape delay effect with analog emulation and modern controls. It recreates classic hardware echo machines for a warm, characterful sound. Use it standalone or as an AUv3 plugin in iOS DAWs.
- Analog modeled dual playhead delay
- Modeled microphone input with saturation
- Normal and Ping Pong modes
- High pass and Low pass feedback filters
- Powerful LFO time modulation
- BPM syncable delay time
- MIDI delay time modulation
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K7D is a powerful and affordable, vintage tape delay effect plugin for iOS. K7D recreates the hardware echo machines of the past using Imaginando’s signature style of obsessive analog emulation, but with an enhanced level of control from a sleek, modern interface. Using this approach allows a whole new world of creative possibilities, while still retaining a warm, full-bodied analog sound, bursting with character and personality. To give K7D it’s distinctive analog flavour, we studied and analysed the tiny details of what makes classic hardware delays great, and painstakingly recreated every subtle nuance for a fantastically authentic sound. Available as a standalone app and audio unit plugin, you can use it digital audio stations for iOS such as Garage Band, AUM, Cubasis, Auria, Audiobus, etc. Features - 1ms to 1 sec. dual playhead analog modeled delay with noise, tape distortion and mechanical vibration models - Modeled microphone input with pre-amp saturation - Normal and Ping Pong modes - Optimized gain staging and saturation algorithms for very musical results - Delay time spread between heads and stereo width control - High pass and Low pass filter on feedback path - Powerful LFO bipolar time modulation with multiple waveforms (sine, triangular, saw, square, sample and hold and filtered sample and hold) and possibility of inverted LFO phase on second play head (for added stereo imaging) - Delay time syncable with BPM - Possibility of delay time modulation via incoming midi notes - Oscilloscope visualisation of audio waveform and LFO waveform - Built-in patch manager - Audiounit compatible
Screenshots
Verdict
The clearest difference is review sentiment: apeFilter at 100% against K7D's 80%. apeFilter also leads on rating (4.8 vs 4.6) and iOS requirement (15.6 vs 17.0). K7D's advantage is price ($3.99 vs $7.99). On ratings volume, update cadence, 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
apeFilter costs $7.99 and K7D $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
apeFilter holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 33 and 79 respectively. Written reviews point the same way: 100% of apeFilter's written reviews are positive against 80% of K7D's.
apeFilter ships an update every 6 weeks, K7D every 3 months. The most recent releases landed on September 12, 2026 and September 22, 2026 respectively.
| Parameter | apeFilter | K7D |
|---|---|---|
| Price | $7.99 | $3.99 — better |
| Rating | 4.8 (33 ratings) — better | 4.6 (79 ratings) |
| Positive reviews | 100.0% of reviews — better | 79.5% of reviews |
| Number of ratings | 33 | 79 — better |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 16 MB | 113 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | Imaginando Lda |
Customer experience
apeFilter
K7D
In-app purchases
apeFilter
No in-app purchases
K7D
No in-app purchases









