Comparison

GLTalk vs Smart PDF Compressor

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

Head to head
About

GLTalk

This free VoIP application offers hassle-free calling and chatting with features like multimedia messaging, video chat, and voice conferencing. It allows for affordable international calls and provides convenient features like voicemail to email and integration with your existing address book.

Highlights
  • Free GLTalk to GLTalk calling
  • Multimedia Messaging
  • Video Chat
  • Voice Conferencing
  • Affordable international calling
  • Voicemail to email
Read full description

GLTalk is a FREE VOiP application for easy, hassle-free and convenient calling and chatting. GLTalk comes with a number of features and benefits including: + No hidden charges + Free GLTalk to GLTalk calling* + Multimedia Messaging + Video Chat + Voice Conferencing + GLNumber + Affordable international calling + View detailed call history + Voicemail to email + Never enter access or PIN numbers again + Use existing address book to connect with your contacts + Multilingual customer support * GLTalk to GLTalk calls and chats are free. Operator data charges may apply.

About

Smart PDF Compressor

Features
Read full description

Compress PDF files instantly on your iPhone and iPad. Smart PDF Compressor reduces file sizes by up to 95% while maintaining readable quality — perfect for sharing via email, messaging apps, or cloud storage. ALL PROCESSING IS LOCAL Your documents never leave your device. No internet connection required, no cloud uploads, no data collection. Complete privacy guaranteed. KEY FEATURES - Smart Compression: Automatically detects scanned vs. digital PDFs and applies optimal compression settings - Three Presets: Light (best quality), Standard (balanced), and Maximum (smallest file size) - Batch Compression: Compress multiple PDFs at once with progress tracking - Full Control: Adjust image quality, resolution (72-300 DPI), and grayscale conversion - Side-by-Side Preview: Compare original and compressed versions before saving - File History: Browse, preview, rename, and share all your compressed files - Native iPad Support: Full iPad experience with tab bar navigation HOW IT WORKS 1. Tap + to select a PDF from Files 2. Choose your compression level or customize settings 3. Tap Compress and see the results instantly 4. Share or save your compressed PDF PERFECT FOR - Reducing email attachment sizes - Saving storage space on your device - Compressing scanned documents - Preparing files for upload to web forms - Sharing large PDFs via messaging apps Smart PDF Compressor uses Apple's PDFKit and advanced image processing to deliver fast, reliable compression without sacrificing readability.

Screenshots

GLTalk4 screens
Smart PDF Compressor4 screens

Verdict

The call

The clearest difference is in-app purchases: Smart PDF Compressor at none against GLTalk's 4. Smart PDF Compressor also leads on update cadence (every 9 days vs every 2 months). GLTalk's advantage is iOS requirement (16.0 vs 18.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. GLTalk sells 4 one-off in-app purchases. Smart PDF Compressor asks for nothing beyond the download.

UpkeepUpdate frequency

GLTalk ships an update every 2 months, Smart PDF Compressor every 9 days. The most recent releases landed on August 11, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
GLTalk versus Smart PDF Compressor: the parameters behind the verdict, then further details
ParameterGLTalkSmart PDF Compressor
PriceFreeFree
Rating3.2 (30 ratings) — better—
Positive reviews36.4% of reviews—
Number of ratings30 — better—
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better18.0
Further details — not scored
Size117 MB1 MB
Age rating17+4+
DeveloperGoldLine Telemanagement IncQuan Dang

In-app purchases

4 purchases

GLTalk

One-time4
  • GLTalk $0.99 Credit$0.99
  • GLTalk $4.99 Credit$4.99
  • GLTalk $9.99 Credit$9.99
Show 1 more
  • GLTalk $19.99 Credit$19.99
None

Smart PDF Compressor

No in-app purchases

Questions

Is GLTalk free?
GLTalk is free to download, with in-app purchases available.
Is Smart PDF Compressor free?
Smart PDF Compressor is free to download, with no in-app purchases.
Do GLTalk or Smart PDF Compressor have ads?
Neither GLTalk nor Smart PDF Compressor shows ads.
Which is updated more often, GLTalk or Smart PDF Compressor?
GLTalk ships an update every 2 months, and Smart PDF Compressor every 9 days. Most recently, GLTalk was updated on August 11, 2026 and Smart PDF Compressor on September 19, 2026.

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