--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "ReadEra – book reader pdf epub" developer_entity: "READERA LLC" bundle_id: "org.readera" app_store_id: "1669188337" category: "Books & Reference" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-06-07" report_date: "2026-08-06" last_verified: "2026-08-06T00:00:00.000Z" report_version: "26.05.20+2300" total_reviews: 1564647 overall_rating: 4.8 sentiment: "Excited" sentiment_score: 75 confidence: "high" confidence_score: 0.8 top_praise_theme: "Offline reading capability and broad file format support make this a reliable tool for digital book enthusiasts" top_complaint_theme: "Missing cross-device synchronization prevents users from maintaining reading progress when switching between different mobile devices" review_sample_size: 99 total_review_count: 99 analyzed_review_count: 99 data_age_days: 10 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["books & reference", "free", "excited sentiment", "mobile app", "app review", "app analysis", "readers,", "students,", "professionals"] canonical_url: "https://marlvel.ai/apps/readera-book-reader-pdf-epub" license: "CC-BY-NC 4.0" content_version: "v2" --- # ReadEra – book reader pdf epub Intelligence Report ## TL;DR {#tldr} - **Category**: Books & Reference · Free - **Signal**: Rating 4.85 · Sentiment Excited - **Recent focus**: Missing cross-device synchronization prevents users from maintaining reading progress when switching between different mobile devices (top complaint) · Offline reading capability and broad file format support make this a reliable tool for digital book enthusiasts (top praise) > **TL;DR:** ReadEra – book reader pdf epub is a books & reference app by READERA LLC, rated 4.85/5 by 1.6M users, with Excited user sentiment (75/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** ReadEra – book reader pdf epub maintains Excited user sentiment (4.85/5 from 1.6M reviews), with users consistently praising offline reading capability and broad file format support make this a reliable tool for digital book enthusiasts. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.85/5 (1.6M reviews) | | **User Mood** | Excited | | **Category** | Books & Reference | | **Developer** | READERA LLC | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | High (0.8/1.0) | | **Data Age** | 10d | ## Metadata & Market Performance - **Publisher:** READERA LLC - **Category:** Books & Reference - **Target Audience:** Readers, students, and professionals who require a versatile, offline-capable tool for managing and consuming diverse document formats. - **Platforms:** iOS & Android - **Version Reviewed:** 1.2.3 - **Report Date:** 2026-08-06 - **Signal Count:** 99 reviews analyzed - **Confidence:** High (0.8/1.0) - **App Store ID (iOS):** 1669188337 - **Bundle ID:** org.readera - **Google Play ID:** org.readera - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-06 - **Short Description:** Read books PDF, EPUB, WORD, KINDLE, MOBI! Your ebook reader among reading apps. ## Executive Snapshot **What it is:** ReadEra is a multi-format book reader for Android and iOS that supports PDF, EPUB, MOBI, and Microsoft Word documents. **Why users hire it:** Users hire ReadEra for a clean, ad-free, and offline-capable reading environment that consolidates multiple file types into a single library. ## App DNA (Features & Intent) - **[Differentiator] Multi-format Support:** Native rendering for PDF, EPUB, MOBI, AZW3, FB2, DOC, DOCX, RTF, TXT, ODT, CHM, and DJVU formats. - **[Differentiator] Multi-document Mode:** Supports split-screen reading of two documents simultaneously on Android. - **[Standard] Library Management:** Auto-detection of files, thematic collections, and sorting by author, series, or format. ## Market Position {#market-position} ReadEra holds a dominant 4.8★ rating across 1.5M+ reviews on Android, signaling high user satisfaction with its ad-free model. The lack of cloud-sync features creates a competitive gap compared to more connected reading platforms. ## Monetization Strategy - **Model:** Free - **Tiers:** Entirely free with no ads or internal purchases - **Analysis:** The app operates as a free, ad-free utility, likely serving as a brand-building tool for the developer's broader publishing platform. ## 🟢 User Sentiment (High Confidence: 99 of 99 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.85/5 - **Platform Split:** iOS 4.2/5 (229 ratings) | Android 4.8/5 (1.6M ratings) - **Overall Sentiment:** Excited ### Top Praises - **Offline reading capability and broad file format support make this a reliable tool for digital book enthusiasts** - **Customizable reading interface allows users to adjust font size and page themes for comfortable long-form reading sessions** - **Generous free tier without intrusive advertisements provides a high-value experience for casual and power users alike** ### Top Complaints (Impact Areas) - **Missing cross-device synchronization prevents users from maintaining reading progress when switching between different mobile devices** ## SWOT Analysis {#swot} **Core Strengths:** - Multi-format rendering engine eliminates the need for multiple reader apps - Ad-free, offline-first architecture sustains high user trust - Split-screen multi-document mode enables simultaneous reading on Android **Growth Levers:** - Integration of cloud-sync would resolve the #1 user-requested feature - Native in-app dictionary lookup would improve language learning utility - Advanced annotation tools would capture the academic study segment ## Recent Changes (v2 → v3) {#recent-changes} The report shows a shift toward prioritizing core reading utility, specifically through the planned integration of an in-app dictionary, while maintaining a stable but maintenance-focused development cadence. **Overall trend**: Stable **Compared at**: 2026-08-06 ### High-impact changes - **[Shifted] Strategic Positioning Pivot** (positioning) - **[Shifted] PM Roadmap Prioritization** (features) ### Medium-impact changes - **[Added] Updated Threat and Strength Profile** (swot) ## What's New - **Latest (v1.2.3, 1 months ago):** Introduced Collections for organizing content, a Reviews tool for user feedback, and support for downloading additional TTS voices. ## App Momentum (Maintenance) {#momentum} - Shipped thematic collections in latest release. - Ships ~6 releases per year. > **Cadence:** 2 total versions · 2 majors in last 6 months · 59 days since last update · 16 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} ReadEra – book reader pdf epub is a market-leading books & reference app that is completely free. With a 4.85/5 rating from 1.6M reviews, it delivers strong user satisfaction. > **Bottom Line:** ReadEra wins on utility and an ad-free interface, but the lack of cloud-sync creates a churn risk for power users, so the PM should prioritize cloud-sync integration to defend the user base against more connected rivals. **Best for:** Readers, students, and professionals who require a versatile, offline-capable tool for managing and consuming diverse document formats. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship cloud-based synchronization for reading progress because it is the top-requested missing feature → reduce churn of power users ### Outlook: Stable The book-reader market is consolidating around platforms that offer seamless cloud continuity, placing ReadEra's offline-only model at a strategic disadvantage. While the current ad-free experience maintains high loyalty, the PM must bridge the sync gap to prevent long-term churn to more connected alternatives. - 🟢 The latest release added thematic collections, signaling that the developer is actively refining library management tools for power users. - 🔴 The lack of cross-device sync creates a retention ceiling, as power users increasingly demand seamless progress continuity across their mobile devices. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.85/5 | | Total Reviews | 1.6M | | Sentiment | Excited (75/100) | | Confidence | High | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **ReadEra – book reader pdf epub** (this app) | 4.85/5 | Excited | READERA LLC | | [디리토](https://marlvel.ai/apps/kr-co-diritto) | 4.4/5 | N/A | RIDI Corporation | | [하이북 (레드) - 무협, 판타지 소설, 웹툰, 만화](https://marlvel.ai/apps/kr-co-hibook-a00700) | 3.6/5 | N/A | hibook | | [목회와 신학](https://marlvel.ai/apps/app--977) | 3.0/5 | N/A | Duranno | | [법퍼링 법전 - 변호사가 만든 법전, 버퍼링 법전](https://marlvel.ai/apps/net-papership-beoppering-beoppering) | 4.9/5 | N/A | Jongwoo, Bai | | [ኡሱሉ ሰላሳ ኪታብ](https://marlvel.ai/apps/com-hussenapp-usulusman) | 5.0/5 | N/A | Hussen Oumer Amid | ## Company Profile - **Developer:** READERA LLC - **Website:** [https://readera.org](https://readera.org) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/readera-book-reader-pdf-epub/id1669188337?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=org.readera&hl=en&gl=us) - **Dev Site:** [Official Website](https://readera.org) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*디리토*](https://marlvel.ai/apps/kr-co-diritto) (RIDI Corporation) · 4.4/5 Rating - [*하이북 (레드) - 무협, 판타지 소설, 웹툰, 만화*](https://marlvel.ai/apps/kr-co-hibook-a00700) (hibook) · 3.6/5 Rating - [*목회와 신학*](https://marlvel.ai/apps/app--977) (Duranno) · 3.0/5 Rating - [*법퍼링 법전 - 변호사가 만든 법전, 버퍼링 법전*](https://marlvel.ai/apps/net-papership-beoppering-beoppering) (Jongwoo, Bai) · 4.9/5 Rating - [*ኡሱሉ ሰላሳ ኪታብ*](https://marlvel.ai/apps/com-hussenapp-usulusman) (Hussen Oumer Amid) · 5.0/5 Rating - [*አዳኡ ወደዋእ በሽታ እና ፈውሱ*](https://marlvel.ai/apps/com-hussenapp-adauwedewa) (Hussen Oumer Amid) · 4.7/5 Rating - [*원불교 경전법문집*](https://marlvel.ai/apps/kr-or-won-wonbubmoon) (원불교 Wonbuddhism) · 4.6/5 Rating - [*ሸርህ ነዋቂዱል ኢስላም*](https://marlvel.ai/apps/explanation-of-the-new-islamic-book-with-audio-wit) (Hussen Oumer Amid) · N/A Rating - [*두플러스 - 복음을 읽는 새로운 습관*](https://marlvel.ai/apps/app--975) (Duranno) · 4.8/5 Rating - [*현대인의 성경*](https://marlvel.ai/apps/com-biblica-korean) (Biblica, Inc.) · 4.3/5 Rating ## Frequently Asked Questions {#faq} ### Is ReadEra free to use? Yes, ReadEra is entirely free and does not contain advertisements or internal purchases. ### Does ReadEra support syncing between devices? Currently, ReadEra does not support cloud-based synchronization of reading progress or collections across different devices. ### What file formats can I read with ReadEra? ReadEra supports a wide range of formats including PDF, EPUB, MOBI, AZW3, FB2, DOC, DOCX, RTF, TXT, ODT, CHM, and DJVU. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.8/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 99 - **Data Sources:** user reviews, developer website, company about page, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 10 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/readera-book-reader-pdf-epub) Data licensed for AI Agent attribution under CC-BY-NC 4.0.