GoPdf.io vs Auth Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GoPdf.io
This app offers a comprehensive suite of tools for managing PDF documents. It allows users to scan, fill, sign, convert, merge, protect, and compress PDFs, streamlining document workflows.
- Scan documents to PDF
- Fill and sign PDF forms
- Convert PDF to JPG
- Convert PDF to Word
- Merge multiple PDFs
- Password protect PDFs
- Compress PDF files
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SCAN PDF - Scan PDF document with GoPDF's free and simple scan PDF app. - Convert your papers into digital files without any cost. FILL AND SIGN - The forms must be filled, and the documents must be digitally signed so there is no delay concerning time. - Utilize the Fill and Sign PDF Forms app for swift completion. This app allows free fill and sign PDF capabilities, making it easy to edit and sign documents. PDF TO JPG - Utilize the PDF to JPG Converter app for high-quality conversions. - Convert your PDF documents to JPG format quickly and proficiently, enhancing accessibility and modifiability. PDF TO WORD - Use the best PDF to Word Converter app to transfer your files more effectively. This app ensures accurate, swift, and efficient conversion of information from PDF to Word. MERGE PDFs - Move various substantial documents into a single PDF file without any hassle by deploying the Free Merge PDF Document app. - Reorder the pages to provide better structure to your PDFs while simplifying the merging process. PASSWORD PROTECTION - To protect your file, put a strong password to access it using measures to Password Protect PDF files. - Maintain secrecy while giving selective access to people, ensuring security with the password protect PDF files feature. COMPRESS PDFs - To make data shareable efficiently, we need to compress large files without losing their quality. Use the Compress PDF Document File app for streamlined sharing. - Decrease the size of PDF documents to enhance the storage and sharing process, ensuring efficiency. Privacy Policy: https://gopdf.io/privacy Terms of Use: https://gopdf.io/terms-of-use Got a question ? Contact us at support@gopdf.io or check https://gopdf.io/contactus
Auth Sync
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Auth Sync is a 2FA (TOTP) authenticator focused on privacy and simplicity. Generate and use OTP offline, then enable end-to-end encrypted cloud sync only when you need it. Your TOTP vault is encrypted on device—the server has zero knowledge. Highlights TOTP add & scan: QR scan, manual input, 6/8 digits, SHA1/256/512, 30s/60s. Folders & search, tagging, quick copy. E2EE cloud sync on demand; encryption keys never leave your devices. Secure sharing across your own devices (E2EE). Export/Import with encrypted backups; import from common authenticators. Extras: password generator, temporary email, Base64 encode/decode. Local encrypted backups to Files/iCloud. Security True E2EE with zero-knowledge backend. No collection of TOTP contents. Integrity checks to protect your vault. How it works Add accounts (scan QR or enter secret). Use offline codes immediately. Sign in to enable E2EE Sync across devices. Export/Import for long-term backups.
Screenshots
Verdict
The clearest difference is in-app purchases: Auth Sync at none against GoPdf.io's 2. GoPdf.io's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads, 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
Both are free to download. GoPdf.io sells 2 in-app purchases, starting at $9.99 per month. Auth Sync asks for nothing beyond the download.
GoPdf.io ships an update every 2 weeks, Auth Sync every 3 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.
| Parameter | GoPdf.io | Auth Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 21 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | KAYA SMART LLC | DREAMER NETWORK CO., LTD |
In-app purchases
GoPdf.io
- Monthly$9.991 Month
- Yearly$99.991 Year
Auth Sync
No in-app purchases









