If you work with international companies you know how frustrating it is to move between units. This is extremely fast intuitive and has a huge database of units but is customizable so your day to day usage will only require you to choose between the units you personally use. Huge time saver vs my graphic calculator and even google.

I've used this app for years. It has had good times and bad times, but for now it's working pretty well. Areas for improvement:The inch and cm measurements when turning my iPhone 6 plus sideways is way off. It may be correct on a 6 or 6s, but when it's on a 6 plus or 6s plus, the inch and cm are too big. The app needs a calibration setting to let it know if it's on a 6 or a 6 plus so it can have the measurements adjusted to the correct size. As it is now, that function is useless. There's no way to calculate calendar dates. That would round this app out to cover most needs. It's better than it used to be for getting back to the main screen from the settings or selection screens, but if the darkened area had "SWIPE" with a direction arrow, that would help to make clear what to do to get back to the main screen. It still requires some hunt and peck to figure out how to do things like add a favorite. Not sure how to make it more intuitive, but it needs something. All that said, it's a pretty good app and I still recommend it ..

I’ve been using this app for years and it’s honestly still the best in its class. Sure, it’s had its ups and downs over the years, but what app hasn’t. Without a doubt, it’s been an absolute home-run and continues to be daily!

This is the best conversion app that I could find. I would give this one a try. The author responded quickly to my questions. This will be my go to app!