Backline Calc for iPhone

From Audiofile Engineering:

NOTE: Backline Calc is free to download and install so you can demo three free calculators. The remaining calculators may be purchased via in-app purchase.

Backline Calc is a full featured musical calculator built exclusively for iPhone and iPod touch, brought to you by the minds at Audiofile Engineering. Combining powerful, elegant and uncluttered audio utilities with unparalleled technical support, Audiofile Engineering is one of the most innovative and experienced audio software developers for Mac OS X and the revolutionary iPhone.

Backline Calc is an indispensable utility for engineers, musicians, music students and teachers, producers, DJs, video and broadcast engineers and live sound engineers. Backline Calc contains 20 easy-to-use calculators and is free to download and install. The Note Length, File Size and Frames to Timecode calculators are free. Unlock the remaining calculators via in-app purchase.

Free Calculators

Length
- Note Length

Timecode
- Frames to Timecode

Files
- File Size

Paid Calculators

Length
- Bar Length
- Song Length
- Tempo from Length
- Compare Tempos
- Change Tempo

Pitch
- Note Name to...
- MIDI Note to...
- Frequency to...
- Wavelength to...

Timecode
- Convert Timecode
- Change Timecode

Electric
- Compare Power
- Compare Voltage

Acoustics
- Distance to Time
- Time to Distance
- Sound Pressure Level (SPL)
- Panning

Usage Note: You can tap a value (eg. BPM) to manually enter it.