DeDuplicate vs Sound Meter Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DeDuplicate
This app scans your cloud storage for identical files and allows you to remove duplicates, freeing up valuable space. It efficiently identifies exact duplicates using file hash values without downloading your files, ensuring privacy and speed.
- Scans cloud storage for duplicate files
- Removes extra copies to free up space
- Efficient and fast scanning
- Accurate detection using file hash values
- Privacy-first, local processing
- Supports multiple cloud services
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Google Drive, OneDrive, Dropbox, and other cloud services don’t offer built-in tools to find and remove duplicates. If you store many files in the cloud, it’s easy to lose control and waste space. Automatic mobile backups make this problem even worse. DeDuplicate scans your cloud storage, finds identical files, and lets you remove the extra copies to free up space. How it works: 1) Log into your account. 2) Choose one or more folders (or the entire drive) and start the scan. Scan time depends on the NUMBER of files, not their size. 3) Review the detected duplicates and optionally ignore some of them. 4) Confirm the operation. What makes DeDuplicate different: • Efficient and fast: files are NOT downloaded. DeDuplicate uses metadata provided by cloud services, so it saves bandwidth, requires no extra storage, and scans are very quick (e.g. ~100,000 files in under 10 minutes, depending on network speed). • Accurate detection: only EXACT duplicates are detected using file hash values. File names are ignored; contents must be identical. • Privacy-first: everything runs locally on your device. The app connects directly to cloud providers, with no intermediary servers and no file data collection. • Cross-platform support. DeDuplicate currently supports the following cloud services: (PERSONAL ACCOUNTS - see notes below!) • OneDrive • Dropbox • Google Drive (∗) • MEGA • Box • pCloud • Yandex.Disk IMPORTANT: DeDuplicate is designed and tested primarily with PERSONAL/CONSUMER ACCOUNTS. Business, school, or enterprise accounts may behave differently and are not fully supported yet. Improving support for those account types is planned for a future update! NOTES ABOUT GOOGLE DRIVE: - Due to recent changes in Google’s requirements for third-party apps, DeDuplicate currently does not have a “verified” status. You can still use Google Drive normally, but signing in requires a small workaround, which is explained step by step inside the app! - Google proprietary file types (such as Google Docs, Google Sheets, etc.) are treated specially by Google Drive and are NOT included in DeDuplicate’s scan. WHY DO YOU NEED THIS APP? Until now, the only practical way to remove duplicates from cloud storage was a very time-consuming workaround: downloading everything to your computer, using one of the many “offline” duplicate-file utilities, and then syncing the changes back to the cloud. In the worst-case scenario, this even means re-uploading everything from scratch. That’s hardly a viable option when you have over 500 GB of unorganized cat pictures :) DeDuplicate is actively developed. If you encounter any issues, please take the time to contact us!
Sound Meter Plus
This utility tool measures environmental noise and displays decibel (dB) values. It offers features like starting/stopping recordings, saving data to camera roll or files, and showing average, minimum, and maximum dB levels with a graph. Calibration options are also available.
- Measure environmental noise in decibels
- Start/stop sound recording
- Save dB data to Camera Roll or Files app
- Display average, min, and max dB values
- Visualize dB levels with a graph
- Calibrate decibel readings
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Sound Meter is a utility tool that shows decibel values by measuring the environmental noise, displaying dB values in various forms. Features: • Toggle tap to start or stop recording sound data • Save dB sound data image into Camera Roll • Save recorded sound into the Files app • Copy dB sound data to Clipboard for advanced operations • Show average, minimum, and maximum decibel values per second • Indicate decibel levels with a graph line • Display the current noise reference • Display decibel levels with a graph line • Display elapsed time of decibel readings • Calibrate the decibel readings A sound level meter is used for acoustic measurements. It is commonly a hand-held instrument with a microphone. The diaphragm of the microphone responds to changes in air pressure caused by sound waves. That is why the instrument is sometimes referred to as a Sound Pressure Level Meter. The decibel is a unit of measurement used to express the ratio of one value of a power or field quantity to another on a logarithmic scale. This logarithmic quantity is called the power level or field level, respectively. It can be used to express either a change in value or an absolute value. A noise level chart showing examples of sounds with dB levels ranging from 0 to 180 decibels: 180 – Rocket launch 140 – Jet engine at takeoff 120 – Thunderclap 110 – Rock band 100 – Motorcycle 90 – Lawn mower 80 – Alarm clock 70 – Shower 60 – Conversational speech 50 – Light traffic 30 – Whisper 20 – Rustling leaves 10 – A pin dropping 0 – Healthy hearing threshold Sample Sound Data: \[50.256, 51.245, ..., 65.359] You can calibrate your device with an actual sound meter (dBA). Microphones in most devices are limited and should be used as auxiliary tools. For more accurate dB values, we recommend using a dedicated sound level meter. Thanks for your support! Visit nitrio.com for more apps for your iOS devices.
Screenshots
Verdict
The clearest difference is rating: DeDuplicate at 4.5 against Sound Meter Plus's 1.0. DeDuplicate also leads on update cadence (every 2 weeks vs every 39 months) and ratings volume (130 vs 1). Sound Meter Plus's advantage is in-app purchases (none vs 2) and price ($2.99 vs $7.99). On 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
DeDuplicate costs $7.99 and Sound Meter Plus $2.99 up front. DeDuplicate sells 2 one-off in-app purchases. Sound Meter Plus asks for nothing beyond the download.
DeDuplicate holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: DeDuplicate has 130 ratings behind it against 1, so its average is the more settled of the two.
DeDuplicate ships an update every 2 weeks, Sound Meter Plus every 39 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | DeDuplicate | Sound Meter Plus |
|---|---|---|
| Price | $7.99 | $2.99 — better |
| Rating | 4.5 (130 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 48.0% of reviews | — |
| Number of ratings | 130 — better | 1 |
| Update frequency | Every 2 weeks — better | Every 39 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | #191 — better | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Paolo Pugliese | Heng Jia Liang |
Bugs and requests
DeDuplicate
Reported bugs
20 issues- Error 403 and PERMISSION_DENIED messages
- Unable to perform advertised function
- Cannot log in to Yandex Disk
- Google revoked trusted access
- Kicking back errors with developer access token
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- No photo option for Google Photos
- Shows no files for Google Drive
- Temporary access issues with Google Drive (one-hour stints)
- Infinite loop asking for token
- Does not scan Yandex Disk due to login issues
- Repeated error messages
- Says no duplicates when there are
- Does not see duplicate files on Yandex Disk
- Does not work on OneDrive
- Fails to delete duplicates in Mega
- App not working on finding duplicates files in Google Drive
- Only found 100 duplicates out of 12k+ photos on OneDrive
- Said no folders found on Dropbox
- Unable to click delete button for duplicates
- App pretends to delete data but doesn't
Requested features
10 requests- Ability to choose specific duplicates to delete
- Option to filter duplicates by file type
- Option to filter duplicates by size
- Scan for folder duplicates
- Improved Google Photos integration
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- Better Yandex Disk integration
- Improved Mega integration
- More flexible settings and sorting options
- Clearer indication of temporary access limitations
- More responsive customer support
Sound Meter Plus
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DeDuplicate
- Buy me a coffee$0.99
- No Ads - Lifetime$7.99
Sound Meter Plus
No in-app purchases
Questions
Is DeDuplicate free?
Is Sound Meter Plus free?
Which has better reviews, DeDuplicate or Sound Meter Plus?
Do DeDuplicate or Sound Meter Plus have ads?
Which is updated more often, DeDuplicate or Sound Meter Plus?
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