AudioEngineerToolkit
dB, delay, phase, RT60, BPM
$4.99
A complete set of offline calculators for audio engineers — on stage, in the studio, no internet required. No login, no ads, no tracking.
■ Electrical
· Ohm's Law calculator
· Power calculator
· Speaker impedance (series/parallel)
· dB ↔ power ratio converter
■ Delay
· Distance ↔ Time ↔ Phase
· Haas Effect zone finder
· Multi-zone speaker delay alignment
· BPM-based reverb pre-delay
■ Acoustics
· Frequency ↔ Period ↔ Wavelength ↔ Quarter-wavelength
· Octave band calculator
· Distance ↔ time delay
· Room volume calculator
· Room mode calculator
· RT60 reverberation time
■ Tempo & Pitch
· Tap tempo (BPM) finder
· Note length calculator
· Playback speed ↔ pitch converter (turntable-style)
· Loop BPM finder
· Bar duration calculator
· Sample rate / buffer size latency calculator
Keep your go-to calculators in the Favorites tab and open them in one tap.
Available in Korean, English, Japanese, Spanish, and Simplified Chinese. Runs on iPhone, iPad, Mac
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Favorites — star the calculators you use most and open them in one tap from the new Favorites tab.
• iPad & Mac layout, redesigned — comfortable reading width, bigger text, and cleaner tool pickers on larger screens.
• Various bug fixes.
Still no login, no ads, no tracking.
The developer, HYO SEOP LEE, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HYO SEOP LEE
- Size
- 1.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.5 or later.
- iPhone
Requires iOS 26.5 or later. - iPad
Requires iPadOS 26.5 or later. - Mac
Requires macOS 26.5 or later. - Apple Vision
Requires visionOS 26.5 or later.
- iPhone
- Languages
English and 4 more
- English, Japanese, Korean, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 이효섭
