Not worth it. Ads eat up all my time.

Good application, but the ads are too annoying. Every time I open the App, I have to spend 5-6 second waiting for ad to end, and then only 3-4 sec to actually check the converted unit. When you have to check the units repeatedly, your work time at least doubled. Not worth it at all!
Now installing some other app, thankfully there are quite a few of them in App Store. Will delete this one immediately.

Qatari Sun about Convert Units App, v7.5