I would like to see the option to set the needle to zero after it finds the normal range which seems to be around 50 or so and have sound low pitch to high pitch to indicate field strength so I don't have to look at it when I'm using it. Thanks

First off, the app failed to download several times. After I did get it to work, the app itself is not that great. Loaded with glitches and jumpy. Please update soon!?!

I've always liked the Ghost Hunter shows and this is one of the tools used, also it'd be useful with electricity in the house. All I can say is, it's fun!!!

Thanks for adding sound!

This is a really great product. Functions very well. As effective as the Tri-Field. I would have given 5 stars but the new sound added has no control (besides the volume on the phone) that allows the user to customize the sound level. Keep up the good work!

Works as advertised, however it needs additional work. -iPhone will sleep while using app. Needs to be fixed so the app stays running indefinitely. -needs adjustable sampling rates for more stable data. The needle is glitchy on this app; inexplicably jumps to 0 at times while holding near test items. Analog equipment doesn't exhibit this trait. -needs a calibration feature. I'd like to be able to calibrate the needle to match my analog meter. -user selectable ranges. Needle tops out too quickly. Needs to be able to select ranges of milligauss, gauss, kilogauss, etc.

It's interesting that there is an app that is a trick EMF detector to fool your friends, because This one really works! This app is worth five times what it costs. Absolutely a great app! My last EMF detector cost $450.00 and when I put the two together,the results were close enough to be considered equal. Good work! Thanks, Colonel Dove

Seems to work well but it would be way more useful if you could set the range. The range is way too sensitive for normal use.

Just try this where your hood meets the fender and check for leakage, you'll be surprised!

Love it, but don't understand what it's telling me, what are the 3 axis X Y Z how do they show me what's happening?

I never write bad reviews, but this thing does absolutly nothing. The needle stays at 0. Waste of money. I gave one star because I had to.

Parachasers tested this and found it to be very useful. Well worth the money. Could use an option to keep the phone from sleeping or just to turn off the screen only.

I was actually looking for something to graph the output of the 3GS sensor to superficially analyze why a real compass will reverse and turn around while on an accelerating electric passenger train. I tried this near a small ac inductive motor for a cat litter box and it showed the promised sine wave. However if I could recalibrate and the scale based on that, the results of the graph would be much more dramatic. Other ac appliances like an air conditioning unit showed no discernable waveform. Also, if there were auto scaling and pinch and zoom options for the graphs and time adjustments it could reveal more detailed information for the information graphed. I sincerely hope this app was developed to allow people to snoop around their magnetic world and have fun versus a develop and forget app.

Tried it in my naborhooh asked ghoasts To move needle down from 100 and it did

Tried several motors...nothing

EMF measurement does not work. Levels in my house it claims are 30.0 microteslas. Levels three blocks away directly under power lines = 20 microteslas (????). Fifteen blocks away, directly under cell phone tower =15 microteslas. In the middle of a completely wild wood, with no power lines or plumbing, or metal objects within 6 mile radius = 40.0 microteslas. Conclusion: does not work at all.

Ok it works. There are others like the a and e free one which stays at 0 and jumps when activity changes and when the fields are an exposure to people like wiring issues and wifi activity... Because this thing can detect metal the needles stays around 4. And when u hit exposure it goes back to 0 and above 7 for metal. Seperate the sensors. The metal detoctor keeps it at 40. If u look at the 3 colored lines you can clearly see them flat as if it were at 0. Turn the iPhone in different degrees and the lines changes . Each color for the iPhone degree adjustments along x and y. Z? Not unless apple makes -180 degrees (iPhone upside down) part of the regular ui framework. -180 is just an extra code jumble for os 2.2.1 and under. 3.0 sdk has the upgrade. I'm not tryen to pretend you don't kno what your doing because you do. visual studio/VB guy my self and critics make the long hours and soda, cavities and carpultunnel make it more then worth it. Make the metal detector seprate and your emf detector will be the best. It can read fields 10x stronger then the other apps. Almost as good as the real thing. Ghost radar is an app u should all try. It said somethings I couldn't believe. it told me where my keys were... I about soiled my self. Good job.

unfortunately i bought this before it was clearly written that it was stricly and only for the new iPhone 3GS ....since my phone was brand new to me i had no idea...however they still allowed me to purchase it and I now have an app for a phone I do not own so beware...

I downloaded this app, but all it does is buzz. It never detects anything. Can't find any setting to check.

This is app actually works great, but it does require an iPhone 3GS to function. This should be made more clear to the buyer and the name should be changed to gauss meter because it more acurately describes what the app really does. An EMF meter reads AC signals and a Gauss meter reads DC signals. Since this app draws it's data from a magnetometer it's clearly a gauss meter which explains why it reads micro-tesla instead of milli-tesla like an EMF meter should. Those two issues explain away the negative feedback this app gets, this really is a great app for what it is. It would be even better if the app had a setting for turning off the iPhone sleep function. Thanks for the cool programming!

Parachasers tested this and found it to be very useful. Well worth the money. Could use an option to keep the phone from sleeping or just to turn off the screen only. Update now has the sleep override and volume control.9/22/09

i have the lastest update for my ipod touch, why after i paid for it its saying that its not compatable? can i get a refund unless you have a update coming

Parachasers tested this and found it to be very useful. Well worth the money. Could use an option to keep the phone from sleeping or just to turn off the screen only. Update now has the sleep override and volume control.9/22/09 ignore this guy that gave it 1 star as he did not read that it only works with 3Gs.

This app should be made available for the iPod touch. Will there be an update soon?

Comparing readings with a Trifield meter the readings are not even close to accurate.