Maskduck vs Metrix Toolkit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Maskduck
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Maskduck is the fastest way to hide sensitive information in your screenshots and photos before you share them. Smart detection finds private info for you — then a single tap covers it up. Everything happens on your device. Your photos never leave your phone. WHAT IT MASKS • Phone numbers • Email addresses • Credit and debit card numbers • ID and document numbers • Bank account numbers • IP addresses • License plates • Long numeric strings that look private HOW IT WORKS 1. Pick a photo from your library. 2. Maskduck scans the text and highlights anything sensitive. 3. Tap to hide it — or draw your own mask with the brush or rectangle tool. 4. Save or share. That's it. FOUR MASK STYLES • Solid — clean black bars • Pixelate — classic mosaic look • Blur — soft gaussian blur • Hide — cover with a matching background BUILT FOR PRIVACY • 100% on-device processing — nothing is uploaded • No account, no sign-in, no ads, no tracking • Works offline • Only asks for the photo permissions it actually needs WHO IT'S FOR • Anyone sharing receipts, tickets, or order confirmations • Sellers posting product photos with personal info in the background • Developers and designers sharing screenshots with tokens or emails • Journalists and researchers redacting documents • Anyone who values privacy before hitting "send" Stop cropping awkwardly or editing in five different apps. Maskduck handles it in seconds.
Metrix Toolkit
Access detailed information about your device's sensors, radios, and hardware. Inspect NFC tags, scan Bluetooth devices, and test audio output. Unlock advanced features with a one-time purchase.
- Sensor readouts (GPS, barometer, gyroscope)
- NFC tag reading and writing
- Bluetooth device scanning and GATT inspection
- Audio output testing
- LiDAR distance mapping
- Network and device details
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Metrix gives you a clean set of tools for the sensors, radios, network routes, clocks, audio hardware, and device details already built into your iPhone. Open the app when you want a quick look at GPS speed, compass heading, gyroscope motion, barometer pressure, battery status, Wi-Fi and cellular details, Bluetooth signals, NFC tags, camera hardware, storage, memory, screen and graphics details, audio output, biometrics, or LiDAR distance on supported iPhone models. NFC: read and inspect tags in depth chip maker, memory size, NDEF records, and decoded payloads. Metrix recognizes smart cards, transit cards, digital IDs, passports, and security keys. Write URL, text, contact, email, phone, SMS, location, and App Store records to blank tags, then erase them or permanently lock them as read-only. Bluetooth: scan nearby devices with live signal strength, decoded advertisements (iBeacon, Eddystone, device type), and a GATT inspector that connects and reads device info, battery, and services. Metrix also includes a Clock tool for local time, UTC comparison, time-zone details, and locale reference, plus Audio tools for speaker details, frequency testing, bass testing, and sound output checks. Free tools include live readouts, Checkup, public route lookup, Clock, Audio, the LiDAR dot-map distance view, NFC reading and basic writing, and Bluetooth scanning with GATT inspection. Metrix Pro is a one-time purchase that adds Find It, a live Bluetooth proximity finder with a distance ring, intensifying haptics, a direction hint, and 1 m calibration. Plus saved history, recordings, snapshots, saved Bluetooth, Wi-Fi, and NFC items, device nicknames, watches, a trip computer, exports and reports, NFC import/export, advanced NFC writing (Wi-Fi, custom MIME, external, and multi-record tags), and Wi-Fi/cellular speed tests. Metrix does not require an account and does not use ads, analytics, or tracking. Anything you save with Pro stays on your device unless you choose to export or share it. Readings depend on device hardware, iOS permissions, signal quality, location quality, and sensor availability.
Screenshots
Verdict
The clearest difference is update cadence: Maskduck at weekly against Metrix Toolkit's every 2 weeks. 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
Both are free to download. Maskduck sells 1 one-off in-app purchase and Metrix Toolkit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Maskduck ships an update weekly, Metrix Toolkit every 2 weeks. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.
| Parameter | Maskduck | Metrix Toolkit |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | 雨燕 杨 | Joseph May |
In-app purchases
Maskduck
- Remove Watermark$0.99
Metrix Toolkit
- Metrix Pro$4.99









