Check it out: Pip Android
Some brokers are now starting to quote the other major currencies to 5 decimal places. Rationally this should mean that one pip would be 0.00001 currency units, but the potential there for misunderstanding is massive, if a pip would be worth ten times as much with some brokers than with others. So it seems likely the pip will stay at 0.0001 units for most currencies.
Most traders record their profit and loss in currency trading pips as well as in money. This enables easy comparison of one trade with another so you can appraise a system. It also suggests that traders can discuss their leads to a currency exchange forum without unveiling the scale of their account or their profits in greenbacks and cents.