Comparison

Sting Mobile vs PDF Compressor

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

Head to head
About

Sting Mobile

Features
Read full description

The STING Mobile Application comprises the core functionality of the system in a user-friendly mobile interface for you to continue GPS tracking outside the office. From around the world you continue getting real-time data on vehicles and stationary units with detailed track history available on each. • Manage unit list to get relevant information on vehicle movements, location, ignition state, and data actually • Map mode to access units, geofences, tracks, and event markers on the map or detect your own location. • Tracking mode to monitor the precise location and critical parameters of a particular unit. • Timeline tool to get the extended data on events. • Event-based notifications to receive right in the app. • Locator functionality to create links and share unit locations. • Sending of core commands from “units” and “tracking” tabs For advanced user experience fast switch to Dashboard app has been implemented bringing the KPI’s of the fleet to your fingertips.

About

PDF Compressor

Reduce the size of your PDF documents with this easy-to-use tool. Select your file, choose the desired output quality, and compress your PDFs with a single tap. Save disk space and speed up uploads and downloads.

Highlights
  • Compress PDF files
  • Reduce PDF file size
  • Select output PDF quality
  • Easy-to-use interface
  • Single-tap compression
Features
Read full description

If you want to reduce your PDF file size, save your disk space back and faster on uploads and downloads, ... then let PDF Compressor - Compress PDF File app help you. You can easily compress your PDF files right on your device, with just one tap to select your file Select quality of output PDF to reduce file size PDF. PDF Compressor is a tool to compress PDF documents to reduce PDF file size. Compress PDF files allows you to select heavy PDF files to reduce their size. PDF compressor will simply reduce pdf file size with a single tap. PDF Compressor is free and the best tool to reduce PDF file size. Do download this compressor app and tell us more about how we can improve it. Compressing PDF file size makes it possible for anyone to reduce your PDF document size, especially useful for those PDF files with many scan graphics and photos. Compressed PDF documents require less disk space for storage and faster uploads and downloads save transmission time and cost. This app gives you access to compression options to help you to reduce PDF file size without compromising the document's integrity. Compress PDF File rewrites the entire PDF documents using selected compression options as efficiently as possible. Some PDF documents might not get compressed, because the PDF documents might be already compressed or have nothing much to compress. With our simple and easy-to-use app, you can compress/reduce pdf file sizes using your IOS device. Compress PDF file size has the following features: - Very smart and easy-to-use PDF compressor. - Compress PDF files to reduce PDF file size.

Screenshots

Sting Mobile3 screens
PDF Compressor3 screens

Verdict

The call

The clearest difference is ads: Sting Mobile at none against PDF Compressor's shown. PDF Compressor's advantage is update cadence (every 2 months vs every 47 months). On price, in-app purchases, device support and iOS requirement 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sting Mobile ships an update every 47 months, PDF Compressor every 2 months. Both last shipped on November 3, 2026.

Scorecard2 real differences · 8 level
Sting Mobile versus PDF Compressor: the parameters behind the verdict, then further details
ParameterSting MobilePDF Compressor
PriceFreeFree
Rating—4.6 (866 ratings) — better
Positive reviews—26.0% of reviews
Number of ratings—866 — better
Update frequencyEvery 47 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size139 MB11 MB
Age rating4+4+
DeveloperCAPITAL AIR (PTY) LTDVishalbhai Vaghasiya

Bugs and requests

Sting Mobile

Not enough reviews yet to summarise bugs or requests.

PDF Compressor

Reported bugs

9 issues
  • App crashes on second compression attempt
  • File size increases instead of decreasing
  • App exits unexpectedly after compression
  • Compressed file unrecognizable or corrupted
  • Keyboard numbers display as blank
Show 4 more
  • Slow compression times (5+ minutes for small files)
  • Unable to save or retrieve compressed files
  • Document pages expand instead of compress
  • App crashes on launch

Requested features

5 requests
  • Reduce or eliminate advertisements
  • Add compression quality/control settings
  • Batch file compression capability
  • Improved preview functionality for multiple documents
  • Better file naming conventions for compressed files

In-app purchases

None

Sting Mobile

No in-app purchases

None

PDF Compressor

No in-app purchases

Questions

Is Sting Mobile free?
Sting Mobile is free to download, with no in-app purchases.
Is PDF Compressor free?
PDF Compressor is free to download, with no in-app purchases.
Do Sting Mobile or PDF Compressor have ads?
PDF Compressor shows ads; Sting Mobile does not.
Which is updated more often, Sting Mobile or PDF Compressor?
Sting Mobile ships an update every 47 months, and PDF Compressor every 2 months. Most recently, Sting Mobile was updated on November 3, 2026 and PDF Compressor on November 3, 2026.

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