DubFilter vs EQ550
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DubFilter
This app provides a powerful dual filter with resonance and an exclusive overlap parameter. It also features a redesigned stereo sample player with LFO and scrubbing, along with extensive MIDI and file management capabilities.
- Dual low-pass/high-pass filter
- Resonance and Overlap parameter
- Stereo sample player with LFO
- Scrubbing capabilities
- Audiobus and Inter-App Audio support
- MIDI control and file management
- Preset morphing pad
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The Dub Filter is a dual low-pass/high-pass 24/48 dB filter, with resonance and the exclusive Overlap parameter! It contains a completely redesigned stereo sample player with LFO and scrubbing capabilities. Main Features: - Audiobus and Inter-App Audio support (sender and FX) - State Variable Filter (Low-Pass and High-Pass) with resonance and overlap - Built In Stereo Sampler with varispeed and scrubbing - Control Manager LFO for all the Parameters - Midibus, Virtual Midi and Network: 14 bit NRPN controllers - File Manager, sharing common audio files via iTunes, Dropbox and AudioCopy - Snapshots Presets Morphing Pad - Post Fx Chain: Low-shelf Filter, High-shelf and Compressor
EQ550
This audio effect plugin emulates classic American EQs from the late 1960s, offering precise control over equalization with unique Proportional Q technology. It functions as a standalone app or an AUv3 plugin for compatible hosts, providing a flexible and characterful sound shaping experience.
- Standalone and AUv3 plugin
- 3 bands of classic American equalization
- Proportional Q filter bandwidth
- Stereo, Mid, or Side EQ modes
- Undo/Redo and A/B comparison
- Scalable GUI
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EQ550 AUv3 plug-in — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the EQ550 AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of EQ550 AUv3 plug-in comes as In-App Purchase. The EQ550 faithfully captures the punch, low-frequency transparency, and ultra-tight imaging of iconic American EQs of the late 1960’s. Making use of Proportional Q intuitively widens the filter bandwidth at minimal settings and narrows it at higher settings without the need for additional bandwidth controls. This unique feature minimizes the «phase-shift» sound found in many equalizers. Features: • Standalone and AUv3 plug-in; • 3 bands of classic American equalization; • Each band offers 7 selected frequency centers; • Maximum 15dB of boost/cut per band; • EQ Band 1 and 3 offer shelf/peak switching; • Proportional Q narrows filter Q at extremes; • Stereo (Mono), Mid or Side EQ modes; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. The EQ550 provides reciprocal equalization at 21 points in 5 steps of boost to a maximum of 15dB of gain at each point. The twenty one equalization points are divided into three overlapping ranges. The high and low frequency ranges are individually selectable as either peaking or shelving, and a band-pass filter may be inserted independently of all other selected equalization settings. Frequency ranges and boost/cut are selected by switches, and a pushbutton «IN» switch allows the EQ to be silently introduced to the signal path. A small toggle switch is used to insert the band-pass filter into the EQ550. The EQ550 extends the features of the original hardware and joins the flexibility of the digital world to the character of the analog processing. Allows you to choose between equalizer modes (Stereo, Mid, Side) and remove analogue saturation from the processing circuit to deliver pure digital sound. To use EQ550 as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — EQ550 will appear in the list of Audio Unit extensions for effect plug-ins in the host app.
Screenshots
Verdict
The clearest difference is review sentiment: DubFilter at 73% against EQ550's 33%. DubFilter also leads on rating (4.7 vs 4.5) and ratings volume (71 vs 11). EQ550's advantage is update cadence (monthly vs every 6 months) and iOS requirement (10.0 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
Both are free to download. DubFilter sells 1 one-off in-app purchase and EQ550 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
DubFilter holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: DubFilter has 71 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 73% of DubFilter's written reviews are positive against 33% of EQ550's.
DubFilter ships an update every 6 months, EQ550 monthly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.
| Parameter | DubFilter | EQ550 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (71 ratings) — better | 4.5 (11 ratings) |
| Positive reviews | 73.3% of reviews — better | 33.3% of reviews |
| Number of ratings | 71 — better | 11 |
| Update frequency | Every 6 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Amazing Noises | RRS, OOO |
Customer experience
DubFilter
EQ550
In-app purchases
DubFilter
- Audio Unit Plugin Support$1.99
EQ550
- RRS EQ550 Unlimited$4.99








