Seller: Apptomic LLC
-Per customer reviews I have moved the ad banner.
-Improved range finding.
-Fixed some small bugs.
Please write a review if you suggestions on how to improve this app.
Top 100 overall in 48 countries!
Top 10 overall in 17 countries!
-Instantly measure distances with high frequency sonic pulses
-Color coded echo location display
-Simple easy to use interface
-US and Metric units configurable
-MUST MEASURE OBJECTS MORE THAN 2.5 FEET AWAY (PLEASE READ THE INSTRUCTIONS)
Bats navigate through the night air by emitting high frequency sonic pulses and listening for echoes. Submarines use a similar technique to determine the distance and location of underwater targets. Now you can have bat-like vision on your iPhone with Active Sonar!!
Active Sonar emits a high frequency sonic pulse and listens for echoes that that bounce off of objects. The distance the echo has traveled is instantly computed and graphically displayed in a color coded format showing the distance and strength of the echo. Active Sonar will allow you to instantly and accurately measure the distance to objects, such as a wall, up to 12 feet away.
How does Active Sonar work?
Once Active Sonar emits a high frequency sonic pulse, any return echoes that bounce off of objects are detected using iPhone’s built-in microphone. The amount of time that has elapsed from emitting the sonic pulse to detecting the return echo is used to calculate the distance the sonic pulse has traveled. Given the know speed of sound at a particular room temperature (approximately 1125 ft/s), the distance the sonic pulse has traveled can be computed by multiplying the speed of sound by the amount of time the sound has been traveling. Using this calculation, Active Sonar instantly computes the precise distance the echo has traveled.
Active Sonar is easy to use!
Step 1: Turn up the volume.
Step 2: Point iPhone’s built-in speaker at an object.
Step 3: Turn on Active Sonar.
Following these three simple steps will enable you to see with bat-like vision!!
-Only measure objects more than 2.5 feet away from the iPhone
-Noisy environments can interfere with measurement accuracy
-Please read the instructions in the app by touching the info button just above the on button
People need to understand this more a tech demo than a precise tool. A tech demo shows what is possible and lays groundwork for future technology. I think the demonstration is awesome and is an innovative program that will serve as a foundation for things to come.
App works as intended minus the temp and metric. Used an actual tape measure as a base measurement. Don't forget to take into account where the speaker is because that is where the accuracy lies. iPhone 4S 4.5 inches long or .375 ft placed flat facing wall 12 ft away will get reading of 11.625 or 11.63 because the measurement on app rounds up.
Developer 5+ you are great! But there is a bug when changing temperature and to metric units. (I use a converter: GlobeConvert Free, great app)
It works well! It does have bugs in the settings: if I change the temperature or metric settings the app crashes. Please fix this as I really could use the metric units! Oh, and I recommend a new icon so that less people are confused.
To the developer: I'm impressed To those of you that think it doesn't work: I downloaded this app because from time to time, I need some reassurance that I AM surrounded by idiots.
This is a great app. It DOES work. The complainers have no clue about basic physics. You don't have to be a rocket scientist, but you can't be a moron either. If you are trying to measure the distance to a penny from 50' away, it won't work. Use a real world scenario like basic room dimensions and it's great. Get it and play with it!
It's not highly accurate but amazing they pulled this off. It is real right?
I am measuring short distances, like 5 and 2 ft. It is very very close! Highly recommend.
Bueno para medir distancias no muy exactas solo de referencia
It picks up sound too faintly to get a good read. Also it's pretty impractical.
This app is very impressive. Granted the the hardware is limited but the app makes use of what there is. The spectra graph the important part to me. Note to developer: to shut up the whiners who complain about not having a circle graph next time just take polar data by using the compass and convert to rectangle form and graph to create a 2d map of a room and thus make a classic "circle graph" like in the app icon.
At least, on an iPhone 3GS. Start button is sometimes slow to respond for me, other than that a fun app for distance approximations. Tested against a measuring tape and it was surprisingly accurate!
This is a nice app, but isn't always accurate. But it would be nice if it was like a real sonar in the sense that it would be a circular display and you could use the compass or accelerometer to tell when you turned the iPhone/iPod and how fast. Other than that, it is a unique app.
Limited by the iPhone's hardware, but still useful!
Wait for the button, shield against floor/ceiling echoes, and enjoy! For a free, small app, this is perfect.
It's ok but I'm looking for a real sonar so if your looking for 1 to this isn't the app to get it's nothing like the first pic at the top of the page
All I can say is I am an engineer, have a 3GS, and it works quite nicely. It is way-fun to watch.
Considering the iPhone's hardware and software limitations, don't expect a scientific instrument. But it does work surprisingly well. Read and follow the instructions. I did not expect it to work as well as it did. Four stars for it's ability, user interface and the fact that it's free. For how well it works, I wonder how much it can be improved upon.
The general idea is great. Unfortunately this app does not work at all on an iPhone 5. Even under the most ideal conditions, the numbers you receive jump all over the place constantly. Oh well.
App crashes when trying to adjust temperature. This is such a great idea. I do have a few suggestions that would be cool. Would it be possible to have a different view option? More like a top view forward looking radar screen instead of a side scrolling view. Also integrating a small compass would be handy as well. Would there be any way to boost the sound volume output to extend the range? Is there anyway to have some kind of low frequency band pass filtering to eliminate background noise from interfering? How about using the accelerometer sensor to help determine when the iphone is moving forward or backwards. The ability to store single measurement moments that also contain gps, altitude, compass heading and inclination would be a very nice touch.
SNR is poor because source signal is too weak and brief. A longer chirp with pulse compression would work significantly better.
The readings are inaccurate. They display in tenths of a foot leading you to believe it is +\- 0.1 or 0.2 feet - not so. It is off by feet. The display is Very noisy; not nearly as nice as the description. And whenever I try to adjust the room temperature for better accuracy the app crashes. Definitely don't pay for the pro version.
This app had potential but it is lacking , two stars
Buttons non responsive, measurements inaccurate by 5 feet, doesn't work.
Tried this to measure rooms in my house. Worthless! Seriously inaccurate. Gave me a measurement that was off by 15 feet. My advice: Use a real tape measure.
iPhone 4S, iOS 6... Launches, shows ads, but no way to make it actually do what it's supposed to, buttons inactive... Trashed.
Crashed when trying switch metric units... :(
does not work
Pointed directly at an interior wall from a distance of 8 feet to a distance of 1 foot; the range did change but was never accurate as measured by a tape measure. Also, as previously noted, it crashes if you try to change the temp/metric settings.
This app does not work on 4s
Trying to change room temperature shuts down the app and the measurements are very inaccurate. The only verifiable readings were at very short distances and even those were sketchy.
I followed the instructions but it always said an object was about 4.62 +- ft. away.
i thought this app was for ipod touch and i spent literally hours trying to sync it!you wasted my time ! Update and you get 4 stars!
Did not work on my new I-phone4! The only active feature is the "info" icon,which only leads you to app ads. Don't waste your time!
I don't know people say this works? It does not work for the iPhone 4. Lousy. No wonder it's free!
I just can't interpret it on my own. Lol. Have to wait a bit on the on button too- which is probably why some people think it doesn't work.
Don't believe the people who say it does
Please update for iPhone 4/iPod Touch 4G! Thank you
read the instructions. also note there is a temperature setting.
This is fairly accurate and is very easy to use. I imagine that most people leaving negative reviews either haven't read the instructions or have devices without microphones (duh).
Great idea but it doesn't work.
It's just all over the place & does not seem to read past about 8 feet ???? Am I missing something ?
This app gets bad reveiws because people simply don't read the instructions. It's a pretty cool app if you use it right and it's free, you can't go wrong just read the directions - and please don't be an idiot and ask for compatibility with iPod touch.
Read directions. It works pretty well for a free app. Very cool thing to use or show friends.
Considering on what the app is working on and how closely accurate the measurements are ( to the centimeters) I think it's a great app. Just make sure you give the app the proper condition and you'll see how well it works.
Works well for what it is, given the hardware restrictions even on the 3GS. Be sure to set the ambient temperature!
I'm impressed with this app, and think it works reasonably well as long as you follow the instructions in the "info" button. I also think it helps for the room to be fairly quiet so the microphone can pick up the correct sounds. Give it an honest try and I think you will be pleased. P.S. The instructions clearly state that the object needs to be at least 2.5 feet away, not just a few inches like some of you that have posted bad reviews have tried. Once again, follow the instructions. It works!
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