Units Free

Convert between many units from several categories and different unit systems (metric, imperial, ...).

Features:
- categories: length, temperature, capacity, weight, energy, power, pressure, area
- access previous conversions from the history list
- categories have different colors (in the history as well)
- flip units
- send calculations by email
- support for the iPhone 6 and 6+
- support for the iPad multitasking (split view..)



(Free version: requires upgrade to arbitrarily switch categories)