AudioEngineerToolkit
dB, delay, phase, RT60, BPM
USD 5.99
From Ohm's law to speaker delay alignment, room modes, BPM and pitch: audio calculators that work offline. Pin your go-to tools to Favorites. No login, no ads.
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, Simplified Chinese, German, Brazilian Portuguese and French. Runs on iPhone, iPad and Mac.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
• Now available in German, Brazilian Portuguese and French.
• Decimals now work with a comma in regions that use one: you can type them, and results are shown with your decimal separator.
• Some result labels and the Quiz tab are now translated.
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
- 1.5 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 7 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 이효섭
