Opamp tools app for iPhone and iPad

This app is the collection of operational amplifier calculators. It is suitable for hobbyist or electronic engineer.

Features
* Inverting amplifier
* Non-Inverting amplifier
* Differential amplifier
* Summing amplifier
* Inverting comparator
* First-order filter
* Second-order filter (HPF)
* Phase shift oscillator
* Colpitts oscillator
* Limit 5 combinations of component values
* Share CSV via AirDrop
* Upload CSV to iCloud Drive (For iOS8 or later)

Pro Features
* Instrumentation amplifier
* Non-inverting comparator
* Second-order filter (LPF)
* Wien bridege oscillator
* Hartley oscillator
* No limitation of the number of suggestions
* Selectable 1%,5%,10%,20% of values