RT60 vs QK Connect
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.
QK Connect
This app connects to specific QKAudio-powered Bluetooth devices, allowing users to discover and tune into Auracast broadcasts. It also supports scanning QR codes for public broadcasts and firmware updates for compatible devices.
- Discover and tune into Auracast broadcasts
- Scan public broadcast QR codes
- Save broadcast sources
- Update device firmware
- Get QKAudio product news
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Companion app for Bluetooth headphones, speakers and receivers powered by QKAudio technology. COMPATIBLE DEVICES This app does not work with devices other than those listed below: HomeSpot JM320 HomeSpot JY300 HomeSpot JY538 HomeSpot BA310 HomeSpot BA358 Uiskey HD90LE MarsCurve MC50LE FEATURES Search and tune into surrounding Auracast broadcasts. Scan public broadcast QR code of different formats, including the Bluetooth SIG Broadcast Audio URI Specification (UUID 184F). Save up to 3 broadcast sources for automatic power up and rejoin. Upgrade the firmware on your devices to get the newly added features. Get the latest news on products powered by QKAudio.
Screenshots
Verdict
The clearest difference is price: QK Connect at Free against RT60's $34.99. QK Connect also leads on rating (5.0 vs 3.4) and review sentiment (100% vs 67%). 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
QK Connect is free to download; RT60 costs $34.99 up front. Neither carries in-app purchases, so what you see is what you pay.
QK Connect holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 5 and 7 respectively. Written reviews point the same way: 67% of RT60's written reviews are positive against 100% of QK Connect's.
RT60 ships an update every 6 months, QK Connect every 2 months. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.
| Parameter | RT60 | QK Connect |
|---|---|---|
| Price | $34.99 | Free — better |
| Rating | 3.4 (5 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 | 7 — better |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 27 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Smith | GT-tronics |
Customer experience
RT60
QK Connect
In-app purchases
RT60
No in-app purchases
QK Connect
No in-app purchases









