Tip C

Tried about 10 tip calculators and finally found one that allows total amount to be edited for quickly determining how much the tip % will be for a rounded total. Love it!!!

Nice use of screen space by using built in keyboard. Edit: Latest version is much better with. Still keeps great use of screen space but now has great styling. No longer uses the built in keyboard, but the new one is better anyways.

Allows you to see multiple tip levels at a glance without having to recalculate -- nice for deciding whether to leave a little more or less based on service -- however the suggested tip section percentages are dynamic based on tip amount entered (-6, -4, -2, +2, +4, +6) rather than static common ammounts (15%, 18%, 20%), so you don't see 18 if you enter 15 as your default or conversely if 18 is your default you don't see 15%. 15%, 18%, and 20% should always be displayed or better yet make the whole suggested chart configurable. Difficult to see text in low light. Needs to be bright white on black not grey on background image.