Lock Mobile vs PDFIX
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Lock Mobile
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Lock is a learning reinforcement application powered by Domoscio which helps people drive the long-term retention of the skills acquired by their learners. Based on the research in cognitive science, Lock improves the retention of knowledge and skills to guarantee their application in the field. Our powerful algorithm estimates the learnersβ individual retention ability to push them the right reminder at the right time: - Learners benefit from spaced and personalized reminders on the concepts they are most likely to forget: for each reminder, they answer a quiz with a feedback. Created in 2013, Domoscio is specialized in Smart Data and Artificial Intelligence applied to learning and development.
PDFIX
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PDFIX is a smart, secure and minimal PDF automation tool built by Techozon Software House. With a simple sign-up process and no unnecessary data collection, PDFIX helps individuals and teams create, convert, and manage PDF documents efficiently β all without complexity or compromise. Key Features: Lightning-fast PDF automation tools Easy sign-up with secure encrypted data No document tracking or content storage Clean, minimalist interface optimized for performance Developed with privacy and simplicity in mind Privacy First: We do not collect or store any user documents or PDF file content. Only essential details (like name and email) are collected during account creation, all encrypted for your protection. Built for Everyone: Whether you're a student managing reports, a business owner automating invoices, or a team member streamlining documentation, PDFIX is your go-to solution for PDF simplicity. Powered by Techozon Software House, PDFIX is optimized for both individuals and organizations who value privacy, performance, and minimalism in digital tools. For support or inquiries, contact: support@techozon.com Try PDFIX today and simplify your PDF workflow β securely and effortlessly.
Screenshots
Verdict
The clearest difference is update cadence: PDFIX at fortnightly against Lock Mobile's every 5 months. PDFIX also leads on iOS requirement (13.0 vs 15.1). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Lock Mobile ships an update every 5 months, PDFIX fortnightly. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.
| Parameter | Lock Mobile | PDFIX |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Fortnightly β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.0 β better |
| Further details β not scored | ||
| Size | 30 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Domoscio | Mauritz Jarl Software House LLC |
In-app purchases
Lock Mobile
No in-app purchases
PDFIX
No in-app purchases









