Comparison

Decibel Meter Plus vs Contacts Export CSV

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

Head to head
About

Decibel Meter Plus

Measure ambient sound levels and understand their impact on hearing. This app provides real-time decibel readings, exposure time guidelines, and information on noise-induced hearing loss. It helps you identify loud environments and learn how to protect your hearing.

Highlights
  • Measure sound levels
  • Display average, peak, and max values
  • Plotted history of average values
  • Information on NIHL
  • Decibel exposure time guidelines
  • Calibrate measurements
  • Record and export data
Features
Read full description

Decibel Meter helps you quickly check the sound level around you using your device’s built-in microphone. Open the app and instantly see the current sound level in decibels. You can use it to get a general idea of everyday noise levels at home, in the office, in classrooms, outdoors, or in other environments. Key Features: • Real-time sound level measurement • Clear decibel display • Average, peak, and maximum values • Simple visual meter and history graph • Calibration adjustment for different devices and environments • Easy-to-use interface for quick checks • Support for iPhone and iPad • Multiple language support • In-app Support for feedback and questions Please note: Decibel readings may vary depending on your device microphone, case, distance from the sound source, background noise, and calibration settings. This app is designed for general reference and everyday use. It is not a replacement for a certified professional sound level meter. Download Decibel Meter and check the sound around you with ease.

About

Contacts Export CSV

Easily back up, export, and clean your contacts. This app helps you find duplicates, organize by birthdays, and export data in various formats. It works offline and prioritizes your privacy.

Highlights
  • Backup and export contacts
  • Find and remove duplicate contacts
  • Group contacts by birthdays
  • Export to CSV, Excel, JSON, vCard
  • Works offline and securely on-device
  • See recently added contacts
Features
Read full description

See Recently Added Contacts. Groups Contacts by Birthdays, so you never miss a birthday again. Backup and Export Contacts with ease. Find Duplicated Contacts with similar names or phone numbers. You no longer need an app to remember birthdays, an app to export and backup contacts, and another app to find duplicated contacts. Get all of these important features in one app. No Subscriptions, and No Ads. The app doesn't collect any of your data and doesn't use any servers. It works offline, and all contact operations are happening securely on the device. ++ HIGHLIGHTS ++ - Clean and modern design - Performant app without Ads - Super Easy and Intuitive Navigation - See Recently Added Contacts for the current year - Find Duplicated Contacts with similar names or phone numbers - Grouped Contacts by Birthdays so you never miss a birthday - Backup and Export Contacts with ease - Create unlimited backups - Export to CSV, Excel, Numbers, JSON, vCard - Contact Cleanup & Duplicate Contacts Remover ++ DON'T BE A STRANGER ++ We have some exciting features coming soon, but you can always email suggestions or write a review for the app. Don't forget to share this app with a friend, because your support will make this app incredible. Contact us: developer@apps4world.com ++ WE CARE ABOUT YOUR PRIVACY ++ Privacy Policy: https://apps4world.com/privacy-policy-apps.html Terms & Conditions: https://apps4world.com/terms-and-conditions-apps.html

Screenshots

Decibel Meter Plus4 screens
Contacts Export CSV4 screens

Verdict

The call

The clearest difference is rating: Contacts Export CSV at 5.0 against Decibel Meter Plus's 3.0. Decibel Meter Plus's advantage is review sentiment (36% vs 0%) and ratings volume (125 vs 1). On price, ads, in-app purchases 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

Decibel Meter Plus costs $2.99 and Contacts Export CSV $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Contacts Export CSV holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Decibel Meter Plus has 125 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 36% of Decibel Meter Plus's written reviews are positive against 0% of Contacts Export CSV's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Decibel Meter Plus ships an update every 6 weeks, Contacts Export CSV every 3 months. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
Decibel Meter Plus versus Contacts Export CSV: the parameters behind the verdict, then further details
ParameterDecibel Meter PlusContacts Export CSV
Price$2.99$2.99
Rating3.0 (125 ratings)5.0 (1 ratings) — better
Positive reviews35.7% of reviews — better0.0% of reviews
Number of ratings125 — better1
Update frequencyEvery 6 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.815.0 — better
Further details — not scored
Size14 MB1 MB
Age rating4+4+
Developer华芳 张Apps4World

Customer experience

Decibel Meter Plus

All ratings125 ratings
Positive48.8%
Neutral9.6%
Negative41.6%
Written reviews126 reviews
Positive35.7%
Neutral8.7%
Negative55.6%

Contacts Export CSV

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Decibel Meter Plus

Reported bugs

7 issues
  • App requires developer updates and iOS compatibility fixes
  • Baseline reading of 50-80 dB even in complete silence
  • Readings spike dramatically with minimal sound input
  • Graph display lacks user control
  • Inconsistent measurements in same environment
Show 2 more
  • Microphone sensitivity cannot be adjusted
  • App crashes or fails to function on some devices

Requested features

6 requests
  • Calibration function to adjust readings
  • Higher maximum dB limit (120+ dB) for loud events
  • Ability to attach photos with meter readings
  • Better baseline reset to 0 dB in silence
  • dB(A) weighting filter option
Show 1 more
  • Improved control over graphical display

Contacts Export CSV

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Decibel Meter Plus

No in-app purchases

None

Contacts Export CSV

No in-app purchases

Questions

Is Decibel Meter Plus free?
Decibel Meter Plus costs $2.99, with no in-app purchases.
Is Contacts Export CSV free?
Contacts Export CSV costs $2.99, with no in-app purchases.
Which has better reviews, Decibel Meter Plus or Contacts Export CSV?
Contacts Export CSV is rated higher. Decibel Meter Plus averages 3.0 out of 5 from 125 ratings, while Contacts Export CSV averages 5.0 from 1 ratings.
Do Decibel Meter Plus or Contacts Export CSV have ads?
Neither Decibel Meter Plus nor Contacts Export CSV shows ads.
Which is updated more often, Decibel Meter Plus or Contacts Export CSV?
Decibel Meter Plus ships an update every 6 weeks, and Contacts Export CSV every 3 months. Most recently, Decibel Meter Plus was updated on October 15, 2026 and Contacts Export CSV on October 12, 2026.

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