Sonar Ruler
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User Reviews for Sonar Ruler
Good concept. Not enough polish.
I nabbed this app on an impulse buy after seeing it on a particular website. It is sadly, not more than a novelty at this time. A short video plays on first launch, leaving you with only the faintest idea how it works. The user interface was unintuitive but detailed. This app could use a LOT more work into ambient filtering, as it was largely useless due to interference from just about anything. Hopefully, a more concise tutorial and intuitive interface can be worked in. Using an iPhone 3G S
Very intriguing app
This is really a well done app. The interface may not be the slickest, but it does exactly what it sets out to do. For those having trouble, consider a few things:1)Sound reflects best off of hard flat surfaces, so trying to measure a distance to something absorptive or irregularly shaped may not work well.2) Setting the air temperature will indeed affect your measurements.3) Cupping your hand under the microphone and speaker as shown in the video will increase the volume of the clicks by focusing the sound from the phone; think of your hand as a crude megaphone or acoustic horn. This increases the signal to noise ratio and will increase the accuracy of the app.4) Consider the ambient noise in the room. If you are trying to measure in a noisy environment, your signal to noise ratio will be poor and results will be inaccurate.In closing I really am impressed with this; I would not have thought that the built in mic had the sensitivity to detect reflections from those distances. Well done.
Buy It Now
This is a fun and truly innovative application. It works just fine. I used it to measure how much speaker wire I needed to cut from the spool, and for the first time didn't end up with an extra 3 feet of it around the speakers to trip on. However, you shouldn't rely on it if you're planning to build new kitchen cabinets. Well worth the single dollar.
Works fine
For the people who complain a few tips. 1. It works on sound. 2. Don't talk or have people talking while using it. 3. Don't have your tv loud. 4. Keep your hands still while in use. I tried showing people at a party and it would not work. Music was blasting. So try to use it in a quiet place and I'm sure the results will be better.
Not ready for prime time.
To the developer's credit, this app is described as "experimental." Not so ceditable, he is charging a buck for us to bankroll his experiment. It is a fascinating concept, and I hope that eventually the practice will catch up with the theory. For now, I found the results to be off by 10 to 15%, so, far from good enough to put my tape measure away. And, the settings seemed needlessly complex. I understand the need to adjust the temperature, but the frequency, filter, and chirp values should be optimized by the developer instead of the user, it seems to me. And, don't be fooled by the "point and shoot" screenshot with the purple waves measuring 45 inches. The instructional video that comes with the app strongly suggests a much more nerdy stance (scroll right to How to Hold the Phone, above). FWIW, I used this on a 3G iPhone with the latest OS.
This ruler is very accurate
To all those people who have first gen iPhones leaving 1-star reviews: THIS APP ISN'T MADE FOR YOUR PHONE!! The first gen iPhone's microphone isn't nearly as good as those in the 3G and 3GS. It is not as sensitive to various frequencies. I moved into a new apartment a few days ago and this app has worked great. It measures rooms to within a couple inches, which is good enough for positioning furniture. I checked the values with a real tape measure. My wife is amazed. Just make sure you watch the intro video to calibrate your device before using and you're good to go.What these developers were able to achieve on the iPhone really demonstrates the capability of this platform while also capturing the spirit of innovation that, in my opinion, is what make Apple products great. Their drive and determination to do the seemingly impossible is amazing to me. My freaking cell phone is now a tape measure. For real. Like a bat or dolphin. It's insane. I love science.
I love these things
I always wanted one of these for the iPhone. You need to experiment with it and get used to how the results come back. Sometimes it's a bit tricky to figure out where on the spectrum the sound is coming back (most likely because other noise)
Very accurate
Down to the decimal accuracy. Just point it at a wall and get the distance. Once it is calibrated right it is very accurate!
works as advertised
This app works as advertised. It has surprising accuracy at around +/- .5" or better. There are a lot of options, but it is surprisingly easy to use. Very little adjustment is needed for most measuring. The interface is good, but some components (sliders) could stand to be larger for easier manipulation. To get good measurements, all you have to do is place the orange dot at the peak of the wave, and locate the blue dots around the larger portions of the wave. Some adjustments are needed to measure thing that are very close (under 1 foot). The most difficult part is analyzing the results and throwing away the measurements that aren't correct. The correct one tends to stay steady, while the phantom results come and go. Overall, the app is quite an amazing utilization of the iphone hardware.
Could not get it to work at all
I read a bunch of reviews, both good and bad and was fully aware of the fact that this app really falls into the experimental category. But the idea is exceedingly cool and this particular app seemed to be the one to get. As per the author's instructions, I viewed the instructional video and read all of the documentation twice. Nonetheless, I was unable to get the app to work at all. It never gave me an accurate measurement even once. In fact, it never really gave me any measurements at all that were not just noise. Undeterred, I read the docs again and attempted to do a manual configuration of the app. Unfortunately, if you're lucky enough to find the information on the "custom" calibration for the app, the docs are obtuse and don't really explain what the settings in question really do.As a last resort, I contacted the author through the contact link on their website (which contains almost no information about the app itself). It's been two weeks now with no response whatsoever.I'm sure this sort of technology for the iPhone will improve over time, but at the moment neither the app or the company are ready for prime time.
Description
Sonar Ruler is a winner in the Best App Ever Awards - "Most innovative use of iPhone hardware" category! The Amazing New Sonar Ruler is an experimental app that uses echoes to measure distances with your iPhone! * It uses the same principles that dolphins use to find food! * It sends a short pulse from the speaker and measures how long that pulse takes to bounce off of something and return to the phone. It then estimates how far away you are. >> Impress your friends with what this unique app can accomplish using only an iphone! << Ϟ GIZMODO.com: "that's a damned neat trick for a phone to be able to do." Features: * Sonic distance measurement up to 60 feet * Set Units to feet, inches, or meters * Custom saved settings for measuring in different environments If you're a teacher, this app is a great way to teach students the principles of sonar, and how sound propagates through air. ** Watch a demo video here: http://bit.ly/sonarvideo ** German/Japanese subtitles here: http://bit.ly/sonarvid Enjoy!
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