Comparison

Instant Reader vs PDF Reader

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

Head to head
About

Instant Reader

Features
Read full description

This app allows users to work with selected text from PDF documents and web pages using customizable actions and parameters. Key Features & Use Cases Select any word or phrase in English or other languages and request a translation (e.g., Japanese, Chinese, etc.) Select a sentence and request a grammar breakdown or explanation Select a word to open its Wikipedia page for additional context Search images related to selected text using Google Image results Users can define and customize their own parameters to extend functionality and create personalized workflows. AI Integration The app supports connecting to external AI services to generate responses based on selected text. Supported Content: - PDF documents - TXT files - Web pages - Notes More content types and features are planned in future updates. Terms of use: https://app.notion.com/p/Instant-Reader-Terms-of-Use-35315d340c0580ef8459d581696c3e5e Policy: https://app.notion.com/p/Instant-Reader-Policy-34015d340c05800ea627e951926c33cd

About

PDF Reader

Features
Read full description

PDF Reader โ€” your clean, distraction-free companion for reading and annotating PDF documents on iPhone and iPad. Whether you're studying, reviewing contracts, or reading books, PDF Reader gives you the tools to engage with your documents โ€” not just scroll through them. POWERFUL ANNOTATIONS - Highlight text in 6 colors โ€” yellow, green, blue, orange, purple, and teal - Add notes anywhere on the page, with or without a text selection - Drop bookmarks to mark important pages instantly - Tap any annotation to view, edit, or delete it SMART LIBRARY - All your PDFs in one organized library - Automatic cover thumbnails generated from each document - See your last reading position at a glance - Swipe to remove documents you no longer need CLEAN READING EXPERIENCE - Smooth page-by-page navigation with swipe gestures - Full dark mode support โ€” easy on the eyes at night - Remembers exactly where you left off in every document - Fast loading even for large PDF files PRIVATE BY DESIGN - All documents and annotations are stored locally on your device - No account required, no sign-in, no cloud uploads - Your reading data never leaves your phone BUILT FOR iOS - Optimized for iPhone and iPad - Supports iOS safe areas and dynamic text sizes - Available in English and Turkish PDF Reader is perfect for students, professionals, and anyone who works with documents every day.

Screenshots

Instant Reader4 screens
PDF Reader3 screens

Verdict

The call

The clearest difference is in-app purchases: PDF Reader at none against Instant Reader's 1. PDF Reader also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Instant Reader sells 1 in-app purchase, starting at $2.99 per month. PDF Reader asks for nothing beyond the download.

UpkeepUpdate frequency

Instant Reader ships an update every 2 weeks, PDF Reader weekly. The most recent releases landed on September 26, 2026 and October 5, 2026 respectively.

Scorecard2 real differences ยท 4 level
Instant Reader versus PDF Reader: the parameters behind the verdict, then further details
ParameterInstant ReaderPDF Reader
PriceFreeFree
Update frequencyEvery 2 weeksWeekly โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.015.1 โ€” better
Further details โ€” not scored
Size3 MB35 MB
Age rating17+4+
DeveloperRoman VygnichMehmet Tark Ozdemir

In-app purchases

1 purchases

Instant Reader

Subscriptions1
  • Unlimited Actions$2.991 Month
None

PDF Reader

No in-app purchases

Questions

Is Instant Reader free?
Instant Reader is free to download, with in-app purchases available.
Is PDF Reader free?
PDF Reader is free to download, with no in-app purchases.
Do Instant Reader or PDF Reader have ads?
Neither Instant Reader nor PDF Reader shows ads.
Which is updated more often, Instant Reader or PDF Reader?
Instant Reader ships an update every 2 weeks, and PDF Reader weekly. Most recently, Instant Reader was updated on September 26, 2026 and PDF Reader on October 5, 2026.

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