Tool Box

★★★★★ Nice app. I suggest adding other features, such as ultrasonic sound makers and ultrasonic sound detectors

★★★★★ Very useful! I've had this on my Samsung 7 approximately 4 years and no issues. I am a mechanical infrastructure specialist and I use the illumination, vibration, sound, magnetic field detector, protractor, level, unit converter, stopwatch, timer, code reader. If I could find a pro version I would pay for it. I don't see one on the list of apps by the same developer. That's the only reason I don't give it five stars. There could also be an app in this for calculating volume of pipe or vessels.

★★★★★ Many 'toolbox apps' like this are pathetic, but Tool Box actually has a nice, smooth interface, and tools that are sufficiently comprehensive to be useful! It has replaced several apps I used before, because of the convenience. Thanks!

★★☆☆☆ Used to work great, now says my phone has no magnetic sensors so compass no longer works. It used to work. And the mag detector works so not sure what happened with the compass.

★★☆☆☆ Great app but where is the pro version I paid for.? Upgraded my phone, and now I have the free version with adverts. Not happy.

★★☆☆☆ Compass points east but not true east. Altimeter is off by a couple of hundred feet. The app is not usable.