RT60 vs BLEASS Voices
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RT60
This tool measures reverb decay time across octave bands using pink noise. It conforms to ISO 3382 standards for room acoustics and can display results from 50ms to 4 seconds. Save measurement graphs for reports.
- Measures reverb decay time
- Octave band analysis (63Hz - 4kHz)
- Conforms to ISO 3382 standard
- T20 and T30 measurement methods
- Adjustable decay time range (50ms - 4s)
- Save measurement graphs
- Microphone calibration
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Now you can have an RT60 measurement tool for the iPhone. Another in the series of acoustic analysis and test applications from Studio Six Digital, RT60 measures reverb decay time for each octave band, 63Hz - 4kHz, by pulsing pink noise on and off, filtering the incoming signal by octave band, and measuring the timing of the decay of each octave band. RT60 conforms to international acoustics standard ISO 3382 for measuring room decay time (RT) using either the T20 or T30 method. RT60 will measure down to 50ms, and up to 4 seconds. Results are displayed for each band above the band, and the overall RT60 is calculated and displayed on the top of the screen. RT60 requires at least 25dB of headroom between the noise floor of the environment, and the level of the pink noise for T20 analysis. Turn up the amplifier to get more headroom. To use RT60, connect the iPhone output to the input of an amp and speaker, and carefully turn up the level after you tap the Generator icon. RT60 smoothes the results of several readings to get a more stable result. *** Screen Graphics The red bars are the current SPL level for each octave band. The thin black bars show the most recently measured maximum and minimum dB levels for the octave band that the RT60 calculation is using. The vertical yellow bars show the decay range that is available. Note that in some situations, you may not be able to overcome the ambient noise level in the room to get a good reading in every band. *** Calculations If a valid RT60 time can be computed, it is shown above the yellow bar. If it cannot be computed, no bar or value is shown. When your analysis is complete, you can save the graph image to your photo roll to include in a report. *** Calibration & Microphone Like all of the Studio Six Digital apps, RT60 can be calibrated. We set this field to the typical iPhone value, but if you have access to a calibrated SPL meter you can adjust this number as needed. There is a field to select Internal or External microphone. When Internal is selected, a compensation network is used to compensate for the response of the built-in or headset mic. When External is selected, no compensation is done. See our web site for more detailed information. Also, check out our other great audio and acoustics apps: AudioTools, SPL, SPL Graph, for recording SPL over time, RTA, ETC, FFT, Generator, and Speaker Pop. And, if you are looking for a great range of high-quality, professional, audio test equipment, check out iTestMic, iPrecisionMic, or liAudioInterface2.
BLEASS Voices
This audio plugin transforms and harmonizes vocals and monophonic sources with up to 12 pitch-shifted voices. It offers independent control over pitch, formant, and placement, with MIDI and MPE support for expressive performances. Features include synth-style modulators, intelligent pitch correction, and individual voice outputs.
- 12 pitch-shifted voices
- Independent voice control
- MIDI and MPE support
- Synth-style modulators (LFOs, envelope, sequencer)
- Intelligent pitch correction
- Individual voice outputs
- Real-time mode for live performance
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BLEASS Voices is a flexible and powerful audio plugin dedicated to pitching, transforming, doubling and harmonizing vocals and other monophonic sources. With a total of 12 pitch shifted voices, each providing detailed control over pitch, formant, tone, width and placement, BLEASS Voices will redefine your vocal creativity and unleash your inner choir. Four of BLEASS Voices’ harmonized voices can be transposed independently by up to an octave higher or lower, or can be flattened to a chosen pitch. The remaining eight voices are triggered via MIDI, transposing the input signal to match the incoming MIDI notes. Coupled with BLEASS Voices’ deep implementation of MPE, this lets you play vocal chords that ooze expressiveness and nuance, and vocal solos with realistic glides, trills and embellishments. Alongside the extensive MPE support, BLEASS Voices also includes synth-style modulators that add new dimensions of movement and variation to your vocal performances. With two LFOs, an envelope follower and a pattern sequencer, BLEASS Voices is like a performance synth for vocals! All voices have access to the plugin’s intelligent pitch correction algorithm that forces the voices into a selected key and scale. Additionally, as well as feeding into the master output, each voice has its own independent output buss allowing you to mix and add effects to those voices as though they were standalone recordings. BLEASS Voices works with fundamental frequencies ranging from 66Hz (approximately C1) to 5.2kHz (approximately E7), making this the ideal plugin for tuning, doubling and harmonizing not only your vocal parts, but many other monophonic instrument parts too. BLEASS Voices also offers a real-time mode for live performances, ensuring ultra-low latency. BLEASS Voices is available now on PC, Mac and iOS. more information on www.bleass.com/voices
Screenshots
Verdict
The clearest difference is price: BLEASS Voices at $19.99 against RT60's $34.99. BLEASS Voices also leads on rating (4.8 vs 3.4) and ratings volume (77 vs 5). RT60's advantage is update cadence (every 6 months vs every 14 months). On review sentiment, 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
RT60 costs $34.99 and BLEASS Voices $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
BLEASS Voices holds the better App Store score, 4.8 against 3.4. That said, the two scores are not equally well evidenced: BLEASS Voices has 77 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 67% of RT60's written reviews are positive against 74% of BLEASS Voices's.
RT60 ships an update every 6 months, BLEASS Voices every 14 months. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.
| Parameter | RT60 | BLEASS Voices |
|---|---|---|
| Price | $34.99 | $19.99 — better |
| Rating | 3.4 (5 ratings) | 4.8 (77 ratings) — better |
| Positive reviews | 66.7% of reviews | 73.7% of reviews — better |
| Number of ratings | 5 | 77 — better |
| Update frequency | Every 6 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 34 MB |
| Age rating | 4+ | +4 |
| Developer | Andrew Smith | BLEASS |
Customer experience
RT60
BLEASS Voices
In-app purchases
RT60
No in-app purchases
BLEASS Voices
No in-app purchases









