Comparison

Sound Amplifier | Volume Boost vs Hearing Number

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sound Amplifier | Volume Boost

Amplify live headphone audio and enhance your listening experience. This app offers volume boosts, music enhancement, and even a hearing assessment. Record audio and review transcriptions to never miss a word.

Highlights
  • Volume boost presets
  • Music enhancement
  • Hearing assessment
  • Live audio recording
  • Real-time transcriptions
  • Personalized hearing profiles
  • Noise reduction
Features
Read full description

Enhance Your Hearing with Audio Amplifier! Don't miss out on a single sound – open the door to a world of amplified audio! Key Features + Louder Volume Boost: > Select from various sound amplification presets + Music Enhancement: > Elevate your music experience in your favorite Music apps > Immerse yourself in your favorite tunes with superior sound quality + Hearing Assessment Choices: > Assess your hearing accuracy with headphones for precise results > Conveniently use your iPhone's speaker for a quick evaluation + Listen Live and Record: > Record looped audio discreetly to revisit what you've heard > Review real-time transcriptions to ensure you never miss a word Premium Subscription Features: ○ Personalized Hearing Profiles: > Customize your hearing experience with preset options for everyday needs > Conduct a built-in hearing test to fine-tune sound to your unique hearing profile ○ Louder Volume Boost > Boost audio up to 10 times for everyday situations ○ Reduce noise > Eliminates background noise, increases speech intelligibility ○ Maximize music > Export your music with maximum effort > Export music with custom equalizer settings SUBSCRIPTION NOTICE: Please note that a premium subscription is required to access all the app's features. Privacy policy: https://docs.google.com/document/d/1SaV6gewYAk2gdvdJSZGH8spAyA805eJBkxWhmBnK_mc/edit?usp=sharing Terms of service: https://docs.google.com/document/d/1xyNnScm0PrTtNsWxVzWuvFHyVT8Cmi6h3R0BSiTvwso/edit?usp=sharing

About

Hearing Number

Assess your hearing ability by determining the softest sound you can hear in each ear. Understand your unique Hearing Numbers to better protect your hearing and improve communication. Track changes over time and encourage others to take charge of their hearing wellness.

Highlights
  • Measure Hearing Numbers
  • Track hearing changes over time
  • Protect hearing wellness
  • Share with friends and family
  • Learn about hearing health
Read full description

How’s your hearing? Learn your Hearing Numbers—the softest sound you can hear in each ear—with an app created by the Johns Hopkins Bloomberg School of Public Health. Then use your Hearing Numbers to protect your hearing and hear better. Track your hearing to know how it changes over time and encourage others to know their hearing. Take charge of your hearing wellness! Hearing Numbers can be as low as -10 or as high as 100 decibels, or dB. The higher your Hearing Numbers are, the louder sounds will need to be for you to hear them, and the harder it will be to hear and communicate in noisy places. Requires headphones, a quiet space, and about 5 minutes to complete. No advertising, in-app purchases, or product recommendations. The app tests the noise level around you, measures your hearing levels at four frequencies in each ear, and provides your Hearing Numbers. Share the Hearing Number app and encourage your friends and family to learn their Hearing Numbers. Re-check your Hearing Numbers from time to time and review previous results to track how your hearing changes over time. Learn more about the Hearing Number and how to use it at app.HearingNumber.org. This app is created by the Johns Hopkins Bloomberg School of Public Health, seeking to empower people to know their hearing—millions at a time. Disclaimer This hearing wellness app does not constitute medical advice or diagnosis. You should consult with a health care provider for questions related to your hearing or if you are experiencing any of the following: ear pain or ringing, dizziness, ear drainage or a sense of something in your ear, sudden or fluctuating hearing loss, injury or deformity to your ear, or worse hearing in one ear (i.e., your right and left Hearing Numbers are different by more than 10 dB).

Screenshots

Sound Amplifier | Volume Boost4 screens
Hearing Number4 screens

Verdict

The call

The clearest difference is review sentiment: Sound Amplifier | Volume Boost at 84% against Hearing Number's 43%. Sound Amplifier | Volume Boost also leads on ratings volume (2.3K vs 599) and iOS requirement (14.0 vs 16.4). Hearing Number's advantage is in-app purchases (none vs 5) and rating (4.9 vs 4.5). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sound Amplifier | Volume Boost sells 5 in-app purchases, starting at $5.99 per 7 days. Hearing Number asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Hearing Number holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 2.3K and 599 respectively. Written reviews complicate that: 84% of Sound Amplifier | Volume Boost's written reviews are positive against 43% of Hearing Number's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Sound Amplifier | Volume Boost ships an update every 4 months, Hearing Number every 3 months. The most recent releases landed on November 11, 2026 and November 8, 2026 respectively.

Scorecard6 real differences · 4 level
Sound Amplifier | Volume Boost versus Hearing Number: the parameters behind the verdict, then further details
ParameterSound Amplifier | Volume BoostHearing Number
PriceFreeFree
Rating4.5 (2.3K ratings)4.9 (599 ratings) — better
Positive reviews84.1% of reviews — better42.9% of reviews
Number of ratings2.3K — better599
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.4
Further details — not scored
Size34 MB17 MB
Age rating4+12+
DeveloperIrakli TsuladzeMimi Hearing Technologies

Customer experience

Sound Amplifier | Volume Boost

All ratings2,300 ratings
Positive87.2%
Neutral6.6%
Negative6.2%
Written reviews511 reviews
Positive84.1%
Neutral5.9%
Negative10.0%

Hearing Number

All ratings578 ratings
Positive98.3%
Neutral0.7%
Negative1.0%
Written reviews7 reviews
Positive42.9%
Neutral0.0%
Negative57.1%

Bugs and requests

Sound Amplifier | Volume Boost

Reported bugs

3 issues
  • Recording feature not working
  • Delayed sound output
  • Compatibility issues with older devices

Requested features

4 requests
  • Compatibility with more audio sources
  • Background playback support
  • Customizable sound profiles
  • Volume boost for specific apps

Hearing Number

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Sound Amplifier | Volume Boost

Subscriptions4
  • Weekly Access3 Days trial$5.997 Days
  • Hearing Amplifier, Ear Spy3 Days trial$11.991 Month
  • 3-Month Sound Boost Access$12.993 Months
Show 1 more
  • Listening Device, Amp Me3 Days trial$39.991 Year
One-time1
  • lifetime$44.99
None

Hearing Number

No in-app purchases

Questions

Is Sound Amplifier | Volume Boost free?
Sound Amplifier | Volume Boost is free to download, with in-app purchases available.
Is Hearing Number free?
Hearing Number is free to download, with no in-app purchases.
Which has better reviews, Sound Amplifier | Volume Boost or Hearing Number?
Hearing Number is rated higher. Sound Amplifier | Volume Boost averages 4.5 out of 5 from 2.3K ratings, while Hearing Number averages 4.9 from 599 ratings.
Do Sound Amplifier | Volume Boost or Hearing Number have ads?
Neither Sound Amplifier | Volume Boost nor Hearing Number shows ads.
Which is updated more often, Sound Amplifier | Volume Boost or Hearing Number?
Sound Amplifier | Volume Boost ships an update every 4 months, and Hearing Number every 3 months. Most recently, Sound Amplifier | Volume Boost was updated on November 11, 2026 and Hearing Number on November 8, 2026.

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