58
BU Score
Solid
Hearing Aid - Sound Amplifier
✍️ bumetric analysis
“
Hearing Aid - Sound Amplifier is an iOS app from 晓溪 张 in the Education category, currently rated 4.0★ across 428 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 58: Solid (established niche player). For a Education app, that means established niche player.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| highly recommendREVIEW | +$1,400 | |
| too expensiveREVIEW | −$1,000 | |
| Established app (7y old)METRIC | +$800 | |
| Early-stage install base (428 ratings)METRIC | +$400 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 10 MB🔞 4+📱 iOS 11.0+🔖 v3.3.6🔄 updated 2y ago🌐 EN, JA, ZH, ZH📂 Education💰 Paid🚀 Launched 2018 (7y old)
📝 About this app
Features:
1. 3 classes of Amplifier with noise reduction. Users can choose their own volume amplification level, comfortable listening.
2. Hearing Protection: Amplifying the volume can hear minute sound details, but if you enlarge any sound without limit, the loud sound can cause ear pain, dizziness, and even permanent hearing damage. This app uses advanced algorithms to enhance the lower sound while suppressing strong sound to protect your hearing.
3. Multiple Scenarios Selection: This app has a 12-band audio equalizer designed specifically for hearing aids, and provides preset six kinds of listening scenarios for conversational, music, video, and high, medium and low hearing loss. Users can also set their own scenario.
4. Microphone Selection. Currently, different models of iPhones provide 3 to 4 microphones. They are located below the phone, next to the front camera and next to the back camera. The user can select the microphone towards the sound source to get a clearer sound.
5. Recall function. It buffers the past five minutes sound for recall. The function is like the black box of air plane. You can get back the past conversation if it is necessary. Or save it to an audio file as a keeper.
6. A professional sound recorder is attached.
7. Voice to Text. You can use hearing aids. At the same time, record audio files and convert speech to text.
8 Support Bluetooth and wire headphone.
9. Can run parallel with music or game apps. Even if you listen to music, watch videos, play games, you can listen to the sound of environment.
10. High-quality sample rate. Use the sample rate of the CD quality to make the sound details perfectly present.
11. Support sound balance. Users can adjust the volume for 2 ears individually.
12. Can run in the background and very low energy consumption. Even if the screen is locked, the software can be used normally.
13. 7-day free trial
Legal:
Please see Hearing Aid - Sound Amplifier’s “Terms of Services” and “Privacy Policy”
Terms of Use: http://www.dawnstreamsoft.com/tou_en.html
Privacy Policy: http://www.dawnstreamsoft.com/privacy.html
Subscriptions
Hearing Aid - Sound Amplifier is available for free download. All users are invited to take 7 days free trial. If you want to continue using the service, we offer you auto-renewing 1 month Subscription: $4.99 monthly
In addition to this subscription, we also offer two other subscriptions:
3 Months Subscription: $13.49 ($4.49 / month), auto-renewing quarterly
1 Year Subscription: $35.99 ($2.99 / month), auto-renewing yearly
- Payment will be charged to iTunes Account at confirmation of purchase
- Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
- Account will be charged for renewal within 24-hours prior to the end of the renewal
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Setting after purchase
- No cancellation of the current subscription is allowed during active subscription period
Contact Us:
If you have any questions or suggestions, feel free and send them to support@dawnstreamsoft.com. Or visit our website http://www.dawnstreamsoft.com for more information.
We'd love to hear from you :)
1. 3 classes of Amplifier with noise reduction. Users can choose their own volume amplification level, comfortable listening.
2. Hearing Protection: Amplifying the volume can hear minute sound details, but if you enlarge any sound without limit, the loud sound can cause ear pain, dizziness, and even permanent hearing damage. This app uses advanced algorithms to enhance the lower sound while suppressing strong sound to protect your hearing.
3. Multiple Scenarios Selection: This app has a 12-band audio equalizer designed specifically for hearing aids, and provides preset six kinds of listening scenarios for conversational, music, video, and high, medium and low hearing loss. Users can also set their own scenario.
4. Microphone Selection. Currently, different models of iPhones provide 3 to 4 microphones. They are located below the phone, next to the front camera and next to the back camera. The user can select the microphone towards the sound source to get a clearer sound.
5. Recall function. It buffers the past five minutes sound for recall. The function is like the black box of air plane. You can get back the past conversation if it is necessary. Or save it to an audio file as a keeper.
6. A professional sound recorder is attached.
7. Voice to Text. You can use hearing aids. At the same time, record audio files and convert speech to text.
8 Support Bluetooth and wire headphone.
9. Can run parallel with music or game apps. Even if you listen to music, watch videos, play games, you can listen to the sound of environment.
10. High-quality sample rate. Use the sample rate of the CD quality to make the sound details perfectly present.
11. Support sound balance. Users can adjust the volume for 2 ears individually.
12. Can run in the background and very low energy consumption. Even if the screen is locked, the software can be used normally.
13. 7-day free trial
Legal:
Please see Hearing Aid - Sound Amplifier’s “Terms of Services” and “Privacy Policy”
Terms of Use: http://www.dawnstreamsoft.com/tou_en.html
Privacy Policy: http://www.dawnstreamsoft.com/privacy.html
Subscriptions
Hearing Aid - Sound Amplifier is available for free download. All users are invited to take 7 days free trial. If you want to continue using the service, we offer you auto-renewing 1 month Subscription: $4.99 monthly
In addition to this subscription, we also offer two other subscriptions:
3 Months Subscription: $13.49 ($4.49 / month), auto-renewing quarterly
1 Year Subscription: $35.99 ($2.99 / month), auto-renewing yearly
- Payment will be charged to iTunes Account at confirmation of purchase
- Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
- Account will be charged for renewal within 24-hours prior to the end of the renewal
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Setting after purchase
- No cancellation of the current subscription is allowed during active subscription period
Contact Us:
If you have any questions or suggestions, feel free and send them to support@dawnstreamsoft.com. Or visit our website http://www.dawnstreamsoft.com for more information.
We'd love to hear from you :)
🆕 What's New · v3.3.6
Fixed bugs. Improves user experience.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Hearing Aid - Sound Amplifier
- Developer
- 晓溪 张
- Bundle ID
- com.dawnstreamsoft.hearingaid
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 4+
- Languages
- EN, JA, ZH, ZH
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $2.5K/mo
- Top-grossing rank
- 🇯🇵#66 /96
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- https://apps.apple.com/us/app/letterloop-group-newsletters/id6468623700
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- https://apps.apple.com/us/iphone/story/id1868888984
📈Ratings growth428 ratings+3791% lifetimeShow 3-year history estimate ▾
Tracked (57 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🗺️Geographic Distribution●Top 10●Top 30●Top 60
📊Category Rank Trajectory#66 now · best #56 · worst #96
Lower line = better rank · Estimate from ratings growth model · Lower position on chart = worse rank · Higher = top of chart
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
Full revenue analysis
Read the article-style breakdown for Hearing Aid - Sound Amplifier: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
