DC vs Comp 609
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DC
This audio effect plug-in emulates a classic overdrive guitar pedal using advanced circuit modeling. It provides an authentic analog sound and integrates seamlessly with iOS Digital Audio Workstations.
- Circuit-modeled overdrive emulation
- Authentic analog sound
- Audio Unit Extension (AUv3) support
- Expands controls when touched
- Compatible with popular iOS DAWs
- Desktop quality algorithm
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DC-9 Overdrive is a circuit modeled overdrive plug-in that emulates the famous Ibanez® TS9 Tube Screamer. The DSP algorithms in DC-9 take into account the entire schematic, using the latest modeling techniques. This gives you an authentic analog sound that matches the character of the physical circuit. DC-9 is an Audio Unit Extension (AUv3) that works inside host apps. Just open up your favorite host that supports Audio Units and add it as an effect. The controls expand when touched so they can be easily seen while tweaking. DC-9 brings the distinctive warm overdrive crunch to your favorite iOS DAW. Compatible with GarageBand, Cubasis, Auria, BeatMaker, AudioBus, AUM, Modstep, and more. DC-9 gets its name from the Diode Clipper circuit used to create the distortion. Accurate modeling of the clipper by circuit simulation gives DC-9 an edge over the common distortion plug- in. The effect was carefully tuned using A/B comparisons to the original stop box. Blamsoft brings their experience creating top notch plug-ins for the desktop to iOS. The same algorithm is found in the popular Rack Extension for Propellerhead Reason. You get a desktop quality algorithm at an iOS friendly price. Tap Developer Website for sound examples. Note: Second screenshot shows the effect of touching a control.
Comp 609
This audio effect plugin emulates analog compressors, offering extensive control over attack, release, ratio, and saturation. It supports various operation modes, external sidechaining, and parallel compression for detailed audio shaping. A demo version is available with a time limit.
- Analog compressor emulation
- Adjustable attack, release, and ratio
- External sidechain with high-pass filter
- Multiple operation modes (M/S, Stereo, Mono)
- Parallel compression
- Oversampling and 64-bit processing
- Scalable GUI
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Comp 609 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 Comp 609 AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of Comp 609 AUv3 plug-in comes as In-App Purchase. FEATURES: • 6 Attack, 9 Recovery (Release) and 5 Ratio selections; • External Sidechain and Sidechain signal High-pass filter; • 6 operation modes: M/S, Mid-channel, Side-channel, Mono with Right-channel as Sidechain signal, 2-Mono, linked Stereo (or Mono); • Parallel compression; • 8x Oversampling and 64-bit floating point processing; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. COMPRESSOR SECTION: • Threshold determines how much compression will occur. When the input signal exceeds the Threshold level, the compressor engages. A smaller value results in more compression. The available range is from -20 dBu to +12 dBu; • Attack determines how fast limiting will engage when the signal exceeds the limiter Threshold. The available values is from 1 to 6; • Recovery (Release) is the time it takes for the compressor to stop processing after the signal drops below the Threshold value. The available values are 40, 80, 100, 400, 600, 800, 1000, 1500, 2000 ms; • Ratio — this control determines the compressor ratio. The available values are 1.5:1, 2:1, 3:1, 4:1 and 6:1; • Sat. On — this toggle switch enables the Analog Saturation. The saturation has no effect unless this switch is in the «On» (down) position. MASTER SECTION: • SC-Filter — the Sidechain Filter controls the cutoff frequency of a low-cut filter on the compressor control signal Sidechain. The available range is 30 Hz to 240 Hz and Off; • Input Gain controls the signal input level to the plug-in; • The Makeup control increases the signal level out of the compressor to compensate for reduced levels as a result of compression. The available range is -20 dB to +20 dB. The Makeup control does not affect the amount of compression; • Mix — the output balance between the signal processed by the plug-in and the original dry source signal can be adjusted with the Mix control. Mix facilitates parallel compression techniques without having to create additional routings in the DAW; • Comp. In — this toggle switch enables the compressor. The compressor has no effect unless this switch is in the «In» (down) position. • Mode — compressor can operate in six modes: M/S, Mid-channel, Side-channel, Mono with Right-channel as Sidechain signal, 2-Mono, linked Stereo (or Mono). This switch determines the active mode. To use Comp 609 as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — Comp 609 will appear in the list of Audio Unit extensions for effect plug-ins in the host app.
Screenshots
Verdict
The clearest difference is price: Comp 609 at Free against DC's $2.99. Comp 609 also leads on rating (4.8 vs 4.2) and review sentiment (88% vs 64%). DC's advantage is in-app purchases (none vs 1). On ratings volume, update cadence, ads 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
Comp 609 is free to download; DC costs $2.99 up front. Comp 609 sells 1 one-off in-app purchase. DC asks for nothing beyond the download.
Comp 609 holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 14 and 25 respectively. Written reviews point the same way: 64% of DC's written reviews are positive against 88% of Comp 609's.
DC ships an update every 6 months, Comp 609 every 7 months. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.
| Parameter | DC | Comp 609 |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.2 (14 ratings) | 4.8 (25 ratings) — better |
| Positive reviews | 63.6% of reviews | 87.5% of reviews — better |
| Number of ratings | 14 | 25 — better |
| Update frequency | Every 6 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Blamsoft, Inc. | RRS, OOO |
Customer experience
DC
Comp 609
In-app purchases
DC
No in-app purchases
Comp 609
- RRS Comp 609 Unlimited$4.99







