Comparison

PDFSlimmer vs QuietCheck Privacy Scanner

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

Head to head
About

PDFSlimmer

Features
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PDFSlimmer makes your PDFs small, fast, and easy to share. Whether you’re sending documents, forms, school papers, or work files β€” PDFSlimmer instantly reduces file size without losing quality. Built for speed, privacy, and simplicity. No accounts. No uploads. Everything happens securely on your device. Why PDFSlimmer? - Instant compression β€” shrink PDFs in seconds - Smart size reduction β€” keeps text sharp and images clear - 100% private β€” nothing leaves your device - Light and clean UI β€” no clutter, no ads - Multiple compressions β€” try different levels until it’s perfect - Easy sharing β€” email, WhatsApp, AirDrop, Drive, and more - Works with any PDF β€” scans, forms, invoices, books, anything Perfect for anyone who needs fast, reliable PDF compression. All on your device Your files stay safely on your iPhone or iPad. Nothing is uploaded to a server. Make your PDFs smaller the smart way.

About

QuietCheck Privacy Scanner

Features
Read full description

QuietCheck helps you notice the Bluetooth devices around you that could be recording or tracking β€” smart glasses like Meta Ray-Ban, Bluetooth trackers like Tile and Chipolo, drones that broadcast Remote ID, and some cameras that advertise over Bluetooth. It reads the signals these devices broadcast, right on your iPhone. One honest app, not four separate scanners. Private by design: scanning happens entirely on your iPhone β€” no account to scan, no ads, no tracking. And every alert carries an honest confidence level β€” Unverified, Low, Medium, or High β€” because a Bluetooth signal is a clue, not proof that anyone is recording you. A quiet scan isn't a guarantee that nothing's there; QuietCheck helps you notice, it doesn't promise to catch everything. PAY ONCE. NO SUBSCRIPTION. EVER. No weekly traps, no "can't cancel" runaround, no ads. Your first 24 hours unlock every feature β€” no sign-up, no payment, no limits. After that, a single one-time purchase keeps the full set. That's the whole deal. WHAT IT FINDS β€’ Smart glasses β€” scans for the Bluetooth signals broadcast by camera-equipped glasses like Meta Ray-Ban and Snap Spectacles. β€’ Bluetooth trackers β€” detects Tile, Chipolo, and similar trackers nearby, and flags one that keeps showing up near you over time. β€’ Drones β€” reads the standardized Remote ID signal most drones are required to broadcast. β€’ Action cameras β€” detects the Bluetooth signal that action and 360 cameras such as GoPro broadcast when their wireless is on. A camera advertising means it's present, not that it's recording. β€’ Hidden cameras β€” an on-device camera-and-flashlight check that looks for the tell-tale glint of a camera lens. β€’ Action cameras β€” detects the Bluetooth signal that action and 360 cameras such as GoPro broadcast when their wireless is on. A camera advertising means it's present, not that it's recording. WHAT IT CAN'T DO (we'd rather tell you up front) QuietCheck is a proximity tool: it only ever detects what's physically near your phone, right now. It can't look up, locate, or monitor a device or a person anywhere else. Background detection is best-effort β€” iOS limits how much an app can scan once it's in the background β€” so a quiet moment doesn't guarantee nothing's there. The hidden-camera check is a heuristic aid, not a guarantee. It's here to help you notice things, not to replace your own judgment. PRIVATE BY DEFAULT Almost everything happens entirely on your iPhone, with no account and no tracking. No analytics SDK, no ad SDK. A few optional features can sync a signature database, submit anonymous feedback, or contribute to a community sighting map β€” each one is spelled out plainly, and each is off or on-device unless you choose otherwise. BUILT FOR THE REAL WORLD β€’ A proximity radar view for what's nearby right now. β€’ Find It β€” a warmer/colder proximity locator to home in on a specific device. β€’ Choose exactly which device types alert you; the rest are still logged. β€’ On-device history of past detections, exportable as CSV. β€’ A "please stop recording" card with your state's recording-consent law. β€’ Apple Watch companion, widgets, and Siri Shortcuts. β€’ An optional "meeting mode" that offers to scan around a calendar event. β€’ Optional location tagging β€” see where a detection happened on a private map. Off by default; your location stays on your phone and is never uploaded. QuietCheck is not affiliated with, endorsed by, or sponsored by Meta, Ray-Ban, Snap, Tile, Chipolo, Samsung, or any other manufacturer referenced in the app. Product names are used only to identify whose hardware a detected signal belongs to.

Screenshots

PDFSlimmer4 screens
QuietCheck Privacy Scanner4 screens

Verdict

The call

The clearest difference is iOS requirement: QuietCheck Privacy Scanner at 17.0 against PDFSlimmer's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. PDFSlimmer sells 1 one-off in-app purchase and QuietCheck Privacy Scanner sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference Β· 5 level
PDFSlimmer versus QuietCheck Privacy Scanner: the parameters behind the verdict, then further details
ParameterPDFSlimmerQuietCheck Privacy Scanner
PriceFreeFree
Update frequencyβ€”Daily
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, Apple Watch β€” better
Requires iOS26.017.0 β€” better
Further details β€” not scored
Size1 MB19 MB
Age rating4+4+
DeveloperAndrei IsacMatthew B. Dickerson

In-app purchases

1 purchases

PDFSlimmer

One-time1
  • PDFSlimmer PRO$2.99
2 purchases

QuietCheck Privacy Scanner

One-time2
  • QuietCheck Pro (Lifetime, Discount)$9.99
  • QuietCheck Pro (Lifetime)$14.99

Questions

Is PDFSlimmer free?
PDFSlimmer is free to download, with in-app purchases available.
Is QuietCheck Privacy Scanner free?
QuietCheck Privacy Scanner is free to download, with in-app purchases available.
Do PDFSlimmer or QuietCheck Privacy Scanner have ads?
Neither PDFSlimmer nor QuietCheck Privacy Scanner shows ads.

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