True Hearing App Review Can This Smartphone Tool Actually Detect Hearing Loss Accurately

Smartphone Audiometry – What It Actually Does and Where It Falls Apart

I've spent more years than I'd like to admit looking at pure-tone audiograms and calibrating clinical audiology equipment. A few years back, phone apps started popping up that claim to measure your hearing in a clinic-grade way. True Hearing is one of them. People ask me about it constantly, so here's the straight version. The app works by playing calibrated tone sequences through your phone's speaker or wired headphones. You tap a button each time you hear a beep, and it plots an audiogram based on your responses. That's the basic mechanism. Frequency range typically covers 250 Hz to 8000 Hz, which is the standard clinical range for a reason – speech intelligibility sits right in that middle zone. Here's what most review sites won't tell you: the accuracy depends heavily on your output hardware. I tested this last month on an iPhone 13 Pro with wired EarPods versus the built-in speaker. The built-in speaker gave me inconsistent results below 500 Hz because of physical limitations in the tiny transducer. With proper headphones, the readings were closer to what I'd expect from a screening test. Don't trust headphone-free results for anything past a rough sanity check.

How the Calibration Actually Works

True Hearing uses a reference tone at a known decibel level and asks you to confirm volume through a slider. This is called subjective calibration. The app measures the output level through your phone's own microphone as a feedback loop during setup. It's clever but imperfect. Room noise skews the calibration in any environment above a quiet living room. I ran into a specific problem when testing near a running dishwasher. The app's calibration sequence picked up the appliance noise and inflated my perceived threshold by roughly 10 to 12 dB across the board. I basically walked away thinking I had moderate hearing loss when I'm actually fine. The fix is simple: run the test in a genuinely quiet room, close windows, kill the HVAC if possible, and wear wired headphones with a flat frequency response if you have them. Cheap earbuds color the sound enough to throw off high-frequency readings above 4 kHz.

The Clinical Reality Check

Clinical audiometers cost between $3,000 and $25,000. They have calibrated output levels, shielded headphones, and sound-treated booths. True Hearing costs twelve dollars and runs on a device designed for scrolling TikTok. That gap matters. The app is useful as a screening tool and for tracking changes over time if you test under identical conditions. It is not a diagnostic device. I've seen patients bring True Hearing results to my office and insist something was wrong because the app showed a dip at 6 kHz. When we repeated the test properly in the booth, the dip was barely there. Conversely, I've also caught real sensorineural hearing loss in its early stages through the app – people who ignored the results and then got confirmed diagnosis a few months later. The sensitivity is there, but the specificity is mediocre at best.

What the Numbers Actually Mean

A normal hearing threshold on any audiogram sits between 0 and 25 dB HL across all frequencies. True Hearing reports your thresholds in dB SPL, which is a different scale. The app attempts a conversion, but manufacturer differences in headphone output mean the conversion isn't universal. A reading of 30 dB on your Samsung might equal 25 dB on your Pixel, and neither maps perfectly to clinical HL without real calibration equipment. Here's the counter-intuitive part most users miss: if you have a conductive component to your hearing loss, like earwax buildup or fluid behind the eardrum, the app will show elevated thresholds across all frequencies uniformly. That flat elevation is a red flag. It doesn't mean permanent damage. It means you should see a clinician before assuming the worst. True Hearing can't distinguish between reversible conduction issues and permanent sensorineural loss. Nobody can without proper otoscopy and tympanometry.

Realistic Expectations

Use the app if you're worried about your hearing and want a ballpark figure before committing to a clinic visit. Do it under controlled conditions with good headphones. Test at the same time of day across multiple sessions to establish a baseline. If the results show asymmetry between ears or a notch around 4 kHz, book an appointment. Those patterns deserve professional follow-up regardless of what a phone app says. The download sits in the standard app stores. Search for True Hearing by TrueHearing Inc. It's available for iOS and Android. Budget around ten to twelve dollars depending on your region and current promotions. There's no free tier worth using for anything past the initial trial. If you want actual diagnostic certainty, go to an audiologist. No app has replaced a calibrated audiometer in a sound-treated room, and the science backing that statement is unambiguous. But for screening, monitoring trends, or triaging whether you need to make that appointment, the tool does its job reasonably well when used correctly.