Comp 609 vs Vocal Tune PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Vocal Tune PRO
This app offers real-time pitch correction for vocals and monophonic audio. It allows for natural or robotic tuning effects and includes artificial vibrato. It can be used as a plugin in DAWs or in standalone mode.
- Real-time pitch correction
- Auto tune vocals
- Adjustable retune amount and speed
- Artificial vibrato effects
- AUv3 plugin support
- Standalone mode operation
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Vocal Tune PRO is a real-time pitch correction effect. Use it as Audio Unit in your favourite DAW or standalone to auto tune your vocals or other monophonic audio. After selecting the right key and scale, set the retune amount and retune speed to adjust between a natural effect or a more processed/robotic effect as can be heard in modern productions. To bring some life back to heavily auto tuned melodies, you can add artificial vibrato with settings for the vibrato depth, rate, time between the start of a note and the onset of vibrato and the time it takes for the vibrato to reach full depth. Vocal Tune PRO can be used both as an Audio Unit (AUv3) plug-in inside a host app such as Audio Evolution Mobile Studio, Auria Pro, Cubasis, etc. (given that it supports AU Music Effects (audio effects + MIDI). It can also be run in standalone mode, correcting the input (mic) in realtime. To avoid a feedback loop in standalone mode, using headphones or an audio interface is required. Also have a look at the vocal pitch and time editor 'Vocal Tune Studio' inside our DAW, Audio Evolution Mobile Studio!
Screenshots
Verdict
The clearest difference is price: Comp 609 at Free against Vocal Tune PRO's $7.99. Comp 609 also leads on rating (4.8 vs 4.0) and review sentiment (88% vs 60%). Vocal Tune PRO's advantage is update cadence (every 3 weeks vs every 7 months) and chart position (#152 vs unranked). On ratings volume, ads, in-app purchases 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; Vocal Tune PRO costs $7.99 up front. Comp 609 sells 1 one-off in-app purchase and Vocal Tune PRO sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Comp 609 holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 25 and 25 respectively. Written reviews point the same way: 88% of Comp 609's written reviews are positive against 60% of Vocal Tune PRO's.
Comp 609 ships an update every 7 months, Vocal Tune PRO every 3 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Comp 609 | Vocal Tune PRO |
|---|---|---|
| Price | Free — better | $7.99 |
| Rating | 4.8 (25 ratings) — better | 4.0 (25 ratings) |
| Positive reviews | 87.5% of reviews — better | 60.0% of reviews |
| Number of ratings | 25 | 25 |
| Update frequency | Every 7 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | — | #152 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 21 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | RRS, OOO | Davy Wentzler |
Customer experience
Comp 609
Vocal Tune PRO
In-app purchases
Comp 609
- RRS Comp 609 Unlimited$4.99
Vocal Tune PRO
- Starts trial in old v1 versionFree
- Unlocks old v1 version$6.99









