Dark Reader vs PDF Indexer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dark Reader
Easily read PDF documents in a comfortable dark mode to reduce eye strain and save battery. This app automatically converts any PDF into a dark theme for a better reading experience on your devices.
- PDF dark mode conversion
- Automatic dark mode application
- All-in-one PDF viewer
- Eye comfort focus
- Supports iPhone, iPad, macOS
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Dark Reader: PDF Viewer is the best way to read and manage PDF files in dark mode or night mode. Reduce eye strain, save battery, and enjoy a more comfortable reading experience by instantly converting your PDF documents into dark mode. Why choose DarkPDF? ► PDF Dark Mode & Night Mode – Instantly switch any PDF into dark mode for easier reading at night. ► Works Automatically – Open any PDF and DarkPDF applies dark mode right away. ► All-in-One PDF Viewer – A clean and simple PDF viewer with dark mode support for iPad, iPhone and macOS. ► Convert PDF into Dark Mode – Turn your documents into a dark theme view with one tap. ► Perfect for Eye Comfort – Ideal for students, professionals, and night readers who want to protect their eyes. DarkPDF is the best PDF viewer with dark mode extension for iOS. Whether it’s reports, eBooks, contracts, lecture notes, or presentations, DarkPDF adds a dark reading experience to every PDF. Download DarkPDF: PDF Night Mode Viewer today and enjoy a smarter, more comfortable way to read PDFs on your iPhone, iPad and macOS. Privacy Policy: https://www.freeprivacypolicy.com/live/17cd28ef-f6e3-42ae-b053-1a317183d906 Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
PDF Indexer
This app creates fast navigation for PDFs by turning title-to-page mappings into searchable indexes. It allows you to import mappings from various file formats and opens directly to the mapped page within the PDF. All data is stored locally on your device for privacy.
- Search across multiple indexed PDFs
- Exact, prefix, substring, and alias matching
- Jump directly to mapped pages
- Import mappings from CSV, JSON, XLSX, and text
- Page-offset calibration
- Mapping correction and export
- Local-first data storage
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PDF Indexer turns a separate title-to-page mapping into fast navigation for a PDF. Choose a PDF, add its index, and search titles across your library. On import, the app divides the PDF into private on-device sections at indexed title pages and removes its temporary full-size copy. A result opens only the matching section at the mapped PDF page. Page offsets handle documents whose printed page numbers do not match their PDF positions. Import mappings from CSV, JSON, XLSX, pasted text, or manual entry. Review validation warnings before saving, correct individual rows later, replace a mapping without copying the PDF again, and export a mapping as CSV or JSON. PDF Indexer is local-first. It needs no account and has no publisher-operated analytics or app-run cloud service. Your app library stays in private device storage unless you choose to export a mapping. The free app may show non-personalized banner ads after any required privacy choices. PDFs, mappings, titles, and searches are not sent to the ad service. See the Privacy Policy for operating-system backup details. Highlights: • Search across multiple indexed PDFs • Exact, prefix, substring, and alias matching • Jump directly to mapped pages • CSV, JSON, XLSX, pasted-text, and manual mapping input • Page-offset calibration and bounds validation • Mapping correction, replacement, and export • Missing-file recovery without losing the mapping • Light and dark appearance PDFs and mappings are supplied by the user. PDF Indexer does not include third-party books or indexes.
Screenshots
Verdict
The clearest difference is rating: PDF Indexer at 5.0 against Dark Reader's 4.4. PDF Indexer also leads on in-app purchases (none vs 2) and update cadence (every 2 days vs every 2 months). Dark Reader's advantage is ads (none vs shown) and ratings volume (7 vs 2). On price 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
Both are free to download. Dark Reader sells 2 in-app purchases, starting at $4.99 per year. PDF Indexer asks for nothing beyond the download.
PDF Indexer holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 2 respectively.
Dark Reader ships an update every 2 months, PDF Indexer every 2 days. The most recent releases landed on September 28, 2026 and October 18, 2026 respectively.
| Parameter | Dark Reader | PDF Indexer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 30.0% of reviews | — |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 67 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Utsav Mangla | MATTHEW BYONG BAE |
Customer experience
Dark Reader
PDF Indexer
In-app purchases
Dark Reader
- Annual$4.991 Year
- Lifetime: Buy once Use forever$5.99
PDF Indexer
No in-app purchases









