Retain in Membrane.  Search: 'Retain' in appstore.

Yeah this one is getting wings.  44 countries.   Over 1,000 downloads with no advertising (didn't even tell my family)

Here are some screen shots.  If people could send grant me a five-star review that would be great.

Unfortunately, the iPad link is broken to the rating screen... (Apple's fault)  I have an expedited review to fix it.  At least they were nice enough to grant me that.

Here are some screen shots.