By David Holzer
Open iTunes to buy and download apps.
Have a look at my plus version, Watts Plus, for more features.
- Set the cost per Kilowatt-Hour (KWH)
- Select Amps, Watts, or Kilowatts
- Set the desired AC voltage (100 - 240 volts)
- Set the Power Factor, (use 100% if unknown)
- Set the amps, watts, or kilowatts slider
- Set the number of hours per day the appliance runs
- Touch the lock on either amps or watts to toggle the lock setting. The unlocked parameter varies when volts or power factor is changed.
- The cost per hour, day, month, and year is computed and displayed, based on hours per day usage entered.
- Previously entered values are remembered next time Wattulator is run.
The cost is only approximate, due to several factors:
- Cost per KWH is tiered by most power suppliers. Enter cost for the desired tier, but recognize that actual costs may be different depending on your power company's billing policies and total energy consumed.
- Power Factor is an estimate because appliance manufacturers don't typically specify a value. An incandescent light has about 100% power factor. An electric motor is in the range of 60% - 80%.
What's New in Version 2.1
Added iPad support and amps/watts locks for controlling the parameter that varies when volts or power factor is changed.
Decent app, could use tweaking
I like the idea, its a useful app. Capabilities for higher voltages and amperages would be helpful. Sliders are a little touchy.
- Category: Utilities
- Updated: Dec 14, 2010
- Version: 2.1
- Size: 0.3 MB
- Language: English
- Seller: David Holzer
- © David Holzer
Compatibility: Requires iOS 3.2 or later. Compatible with iPhone, iPad, and iPod touch.