i2Reader vs Seriatim Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i2Reader
This app is an award-winning eBook reader supporting a wide range of formats including EPUB, PDF, and MOBI. It offers customizable styles, dictionary integration, and convenient ways to upload books via FTP, web server, or Calibre.
- Supports EPUB, PDF, RTF, HTML, FB2, MOBI, DOC, text
- Customizable styles and dictionary support
- Built-in FTP and Web servers for book uploads
- Calibre integration for book management
- Custom PDF reformatting engine
- Autoscroll and auto-hyphenation
- Integrated web browser for book downloads
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i2Reader is an innovative and award-winning eBook reader! Among the features: - Support of EPUB (DRM-free), PDF, RTF, HTML, FB2, MOBI, DOC and plain text formats; - Customizable styles; - Dictionary support (starDict format) for quick word lookup; - Extremely user-friendly interface; - One-way built-in FTP server to upload books and dictionaries to i2Reader; - One-way built-in Web server to upload books and dictionaries from your computer; - Support for cross-platform Calibre tool to upload books to i2Reader; - Custom-made PDF rendering engine that reformats the text from PDFs for easier reading on the iPhone screen; - Autoscroll; - Auto-hyphenation; - Display and save of inline images in the books; - Integrated Web browser to quickly download books from the Internet; - Bookmarks; - Table of Contents; - Landscape and fullscreen modes; - Book groups.
Seriatim Reader
This app transforms books into a calm, focused reading experience by presenting text one sentence at a time. It's designed to reduce cognitive load and distractions, making reading easier for those with ADHD or who get overwhelmed by traditional text formats. Customize your reading pace and utilize built-in AI tools for translation, text-to-speech, and plot inquiries.
- Sentence-by-sentence reading flow
- Customizable text size, spacing, and speed
- Built-in AI for translation and text-to-speech
- Offline EPUB and PDF import
- Haptic feedback for progress
- Private, no tracking, no ads
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Reading shouldn’t feel exhausting. Seriatim Reader transforms books into a calm, focused flow designed for your phone. Forget overwhelming blocks of text, constant page turning, and losing your place. This is reading, made for people who need a different interface to focus. How it Works Import your book and tap "Start." The interface disappears, presenting your book one sentence at a time in a vertical feed. * Tap to advance. * Swipe to navigate. * Focus entirely on the words. * It reduces cognitive load, making dense books feel lighter and easier to finish. Built for Focus & Neurodiversity We stripped away the distractions that make traditional reading apps difficult for many. Whether you have ADHD, get overwhelmed by "walls of text," or just want to read more on your commute, Seriatim helps you maintain momentum. * Focused-style anchors guide your eyes to word beginnings. * Letter-by-letter reveals smooth out the reading pace. * Haptic feedback gives you a tactile sense of progress. Read Your Way: Everything is customizable. Adjust text size, spacing, and reveal speed to match your brain’s processing style. If you get stuck, built-in local AI tools let you translate text, listen via text-to-speech, or ask questions about the plot to the local AI, all without leaving the page. * Private by Design: Your library belongs to you. * Import EPUB and PDF files easily. * Works 100% offline. * No accounts, no tracking, no ads. * All processing happens on your device. Rediscover the joy of finishing a book. Download Seriatim Reader and start reading differently.
Screenshots
Verdict
The clearest difference is review sentiment: Seriatim Reader at 100% against i2Reader's 47%. Seriatim Reader also leads on rating (4.9 vs 4.1) and update cadence (every 8 days vs every 2 months). i2Reader's advantage is iOS requirement (6.1 vs 18.0). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Seriatim Reader holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 15 and 12 respectively. Written reviews point the same way: 47% of i2Reader's written reviews are positive against 100% of Seriatim Reader's.
i2Reader ships an update every 2 months, Seriatim Reader every 8 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.
| Parameter | i2Reader | Seriatim Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (15 ratings) | 4.9 (12 ratings) — better |
| Positive reviews | 47.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | 12 |
| Update frequency | Every 2 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 6.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 25 MB | 134 MB |
| Age rating | 17+ | 17+ |
| Developer | Yuriy Melyushin | Invisible Hours |
Customer experience
i2Reader
Seriatim Reader
In-app purchases
i2Reader
No in-app purchases
Seriatim Reader
No in-app purchases









