Audio Spectrum Analyzer dB RTA

• Free to download
• In-app purchases

Last verified 31 Jul 2026

4.5 3043 ratings · App Store

1. 4/5Clean Design... but wanted Line In option

   It gets four stars because IF you only wanted to use the not so great built-in microphone of your device then it seems to work very well. I was actually willing to pay for a way to unlock a Line-In feature but nothing told me that the feature exists. The fact that the spectrum plot can hold the peaks is a real nice and makes your app more useful. The pop up is super annoying, but being an App developer myself...I understand how selfish people just expect a great feature rich App to be all for FREE (i gave up thinking i could be paid for all my hard work). Just for fun, you can check out my Free iPhone App FlipNshare ProVideo. I did uninstall the app only because i need Line-In feature, please let me know if it’s actually available.

   Killertone · 31 Jul 2026

2. 5/5Great App to Analyze a Strange Noise in Home

   We had encountered a buzzing noise that came and went. The noise was coming from the ceiling my office like it was originating in attic. Was it a bee hive or hornet infestation, wind causing vibrations in eves or loose roof components or more serious issue some kind of electrical hum or buzz. I thought if only I had a spectrum analyzer I could rule out an electrical issue if the noise was 60 HZ or a 120 Hz harmonic. So I thought my phone has a microphone and it certainly could analyze sound . So I found this App for my iphone. It showed the primary vibration was 101 HZ so I felt relieved. But what was it? The room next door was a bathroom and the noise was louder but still coming from the ceiling. So then I thought toilets can cause funny noises. I took off the tank lid and waited until the noise was loudest and touched the float arm hitch was connected to the auto shutoff valve . It was vibrating like crazy and the noise went away . But I still could not understand why the noise was coming from above. Then I thought the plumbing stack vent was just like a pipe in a pipe organ. The vibration in the tank made the column of air in the stack vent resonate. Strangest annoying sound and plumbing issue I have ever heard of in my life. I fixed it by turning the float adjustment screw just a bit. The technology in a smart phone seems to be unlimited.

   jimlistens · 31 Jul 2026

3. 5/5Excellent for quick and dirty measurements

   This app has been an excellent everyday supplement to my more involved measurement mic and software DSP. Also works great as a basic SPL meter to set approximate volume levels. Whenever I don’t need to or feel like setting up my full measurement rig, this app will let me know if my system and my room are behaving as they should be. With so many unreliable, ad-driven, and overpriced audio measurement apps in circulation, this one is a pleasant surprise.

   Hypops · 31 Jul 2026

4. 3/5Popup for Pro Every Few Minutes

   App works great, the graphs and functions are decent and well laid out. The one big frustration is the CONSTANT popup asking me to buy the pro version. Left the graph running on my desk for a moment, it popped up. Close it, watch the graph. A minute later, it popped up again. It ended up popping up and blocking the entire screen four times in under ten minutes. If the popup was less frequent (maybe on app launch and every ten minutes or less), or costs less ($8.99 for pro), I’d rate this better. I’m not paying for the pro version simply due to how annoyed I was at the pushy attitude of the app, and have since uninstalled it.

   DouglasTodd · 31 Jul 2026

5. 1/5Not for the uninformed

   No guidelines in app, downloaded to make adjustments to my car stereo via the cars EQ settings and through my CarPlay settings. Immediately after the app opened the music coming through my car went completely flat, no explanations on how to use the app, half of the buttons I selected returned an error screen. Can only assume it’s been abandoned by devs or is only for people who know what they are doing already and have it as a third device so you can make tweaks while connected via CarPlay. This is really important in Subarus as non CarPlay music is muddy, tinny and overall terrible due to the OEM head unit. Hopefully I can find something else on the App Store but it was a pretty immediate uninstall

   Overseer of Vault 106 · 31 Jul 2026

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