Sound Amplifier | Volume Boost vs GKF Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Volume boost presets
- Music enhancement
- Hearing assessment
- Live audio recording
- Real-time transcriptions
- Personalized hearing profiles
- Noise reduction
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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
GKF Studio
Book fitness sessions and view class schedules directly through the app. Stay updated on class times and reserve your spot easily. Manage your fitness journey conveniently.
- View class schedules
- Book fitness sessions
- Manage bookings
- Stay updated on class times
- Easy session reservation
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Download the app to view schedules & book sessions at GKF Studio!
Screenshots
Verdict
The clearest difference is rating: GKF Studio at 5.0 against Sound Amplifier | Volume Boost's 4.5. GKF Studio also leads on in-app purchases (none vs 5) and review sentiment (100% vs 84%). Sound Amplifier | Volume Boost's advantage is update cadence (every 4 months vs every 44 months) and ratings volume (2.3K vs 3). On price, 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
Both are free to download. Sound Amplifier | Volume Boost sells 5 in-app purchases, starting at $5.99 per 7 days. GKF Studio asks for nothing beyond the download.
GKF Studio holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sound Amplifier | Volume Boost has 2.3K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 84% of Sound Amplifier | Volume Boost's written reviews are positive against 100% of GKF Studio's.
Sound Amplifier | Volume Boost ships an update every 4 months, GKF Studio every 44 months. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.
| Parameter | Sound Amplifier | Volume Boost | GKF Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2.3K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 84.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 2.3K — better | 3 |
| Update frequency | Every 4 months — better | Every 44 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 11.0.0 — better |
| Further details — not scored | ||
| Size | 34 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Irakli Tsuladze | Get Kristen Fit LLC |
Customer experience
Sound Amplifier | Volume Boost
GKF Studio
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
GKF Studio
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sound Amplifier | Volume Boost
- Weekly Access3 Days trial$5.997 Days
- Hearing Amplifier, Ear Spy3 Days trial$11.991 Month
- 3-Month Sound Boost Access$12.993 Months
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- Listening Device, Amp Me3 Days trial$39.991 Year
- lifetime$44.99
GKF Studio
No in-app purchases
