Red PDF Reader vs SpinDex AI
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Red PDF Reader
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Red PDF Reader A clean, distraction-free PDF reader designed for people who actually read. Open any PDF from your Files app and pick up exactly where you left off โ Red PDF Reader remembers your last page automatically and syncs it across all your devices via iCloud. Switch from your iPhone to your iPad and continue reading without missing a beat. Features: Continuous reading โ smooth, vertical scroll layout optimized for long documents Auto-resume โ your last page is saved automatically and synced across devices Recent files โ quickly jump back to any of your last 50 documents Page thumbnails โ visual panel for fast navigation through any document Go to page โ jump directly to any page with a single tap Page indicator โ always know where you are with a subtle page counter overlay No sign-in required. No subscriptions. No ads. Just your PDFs, exactly where you left them.
SpinDex AI
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# Spindex Spindex is a modern task manager inspired by the feel of a physical Rolodex and sticky notes. Organize your work and personal life with unique, interactive views while using AI, voice input, images, reminders, and cloud sync to stay productive. ### Features โข **Three unique task views** * Rolodex with automatic card flipping * 3D Stack with realistic sticky notes * Grid view for quick browsing โข **Capture tasks your way** * Create and edit tasks in seconds * Voice-to-text task entry * Add photos from your camera or gallery * Organize with colors, priorities, categories, and due dates โข **AI-powered productivity** * Break large tasks into actionable steps * Get research and planning assistance * Generate ideas and improve task descriptions * Use AI to analyze your task list and recommend priorities * Recall relevant memory notes while working โข **Memory Notes** Store important information by creating "remember" notes. Spindex keeps these separate from your task list so your AI assistant can recall useful facts, preferences, and decisions when you need them. โข **Stay organized** * Custom categories * Pinned items for quick access * Smart filters for priority, status, and categories * Due date reminders and notifications โข **Cloud Sync** Keep your tasks synchronized across devices and monitor sync status at a glance. โข **Built for productivity** Whether you're managing work projects, planning your day, capturing ideas, or organizing personal tasks, Spindex combines an engaging interface with powerful productivity tools to help you get things done. Download Spindex and experience a fresh, tactile approach to task management.
Screenshots
Verdict
The clearest difference is iOS requirement: SpinDex AI at 15.5 against Red PDF Reader's 18. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Red PDF Reader | SpinDex AI |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | โ |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 18 | 15.5 โ better |
| Further details โ not scored | ||
| Size | 4 MB | 158 MB |
| Age rating | 4+ | 4+ |
| Developer | Khurshed Gulov | Generalsoft Corporation |
In-app purchases
Red PDF Reader
No in-app purchases
SpinDex AI
No in-app purchases









