Do you have a list of units that I can convert? The easiest way to find out if Units has what you need is to download the free version from the App Store and give it a go.
I've got a suggestion for a unit you should include, how do I contact you? Just use our support form - we can't guarantee to add your unit, but we'll look into it.
How do I get rid of the adverts? Just download Units Premium.
Why did you add adverts to Units? We wanted to be able to continue to update and improve Units, but unfortunately we couldn't justify the time investment for an entirely free app.