The ARC Library vs Understory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The ARC Library
Manage your book review workflow with this comprehensive tool. Track ARCs, deadlines, reading progress, and create polished reviews. Features include detailed statistics, a content creator hub, and a public reader profile.
- Track ARCs by ISBN, title, or barcode
- Interactive reading calendar with deadlines
- Detailed reading statistics and analytics
- Rich text review editor with checklist
- Content creator hub for social media campaigns
- Public reader profile for showcasing stats
- TBR spin wheel and Bingo Challenge
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ARC Library is the all-in-one platform for ARC readers, reviewers, book content creators, and authors. Whether you're keeping an overflowing ARC list under control or running your own ARC campaigns, ARC Library brings your books, deadlines, reviews, teams, campaigns, and reader connections together in one place. FOR READERS TRACK YOUR ARCS Add books by title, ISBN, or barcode and keep track of everything from received to reviewed. Log your reading progress by pages, audio minutes, or percentage, and use reading pace calculations to stay ahead of deadlines. NEVER MISS A DEADLINE See publication dates, review deadlines, PR tasks, and other important dates in your reading calendar. Due-soon alerts help you see what needs your attention next. REVIEW EDITOR Write and save reviews directly in ARC Library. Keep notes and quotes while you read, use structured review prompts, and copy your finished review when you're ready to post. READING STATISTICS Explore detailed statistics covering your ARCs, personal books, reviews, teams, PR activity, ratings, genres, reading habits, and more. SPICE AND SWOON RATINGS Track spice and swoon levels for your books, explore your rating distributions, and filter your library by level. CONTENT CREATOR TOOLS Keep track of cover reveals, release posts, reviews, PR campaigns, and other content across your social channels. YOUR ARC READER PROFILE Create a shareable reader profile featuring your reading activity, reviews, favorite genres, social links, and more. Give authors and publishers a better picture of who you are as a reviewer. DISCOVER NEW OPPORTUNITIES Browse forms shared by authors for ARC applications, teams, campaigns, and other opportunities. TBR TOOLS Not sure what to read next? Use the TBR Spin Wheel, reading challenges, and other tools to make choosing your next book a little more fun. FOR AUTHORS MANAGE YOUR BOOKS Keep your books and their ARC information organized in one place. RUN ARC CAMPAIGNS Create and manage ARC campaigns, organize applications, work with readers, and keep track of your campaign from start to finish. FIND ARC READERS Use the Reader Database to discover readers based on genres, tropes, social platforms, activity, and other information they choose to share. CREATE AND SHARE FORMS Create forms for ARC applications, reader teams, PR campaigns, and more. Share them directly or make them discoverable through the ARC Library Form Catalog. MANAGE YOUR READERS Keep your ARC readers and campaign information organized without relying on scattered spreadsheets, forms, messages, and notes. BUILD YOUR TEAMS Create and manage reader teams and keep the people supporting your books connected to your campaigns. ONE LIBRARY, TWO SIDES OF THE ARC EXPERIENCE ARC Library brings readers and authors together while giving each side the tools they need. Readers get a home for their ARCs, reviews, deadlines, statistics, teams, and content. Authors get tools to manage books, campaigns, applications, readers, and ARC teams. FREE TO START Get started with ARC Library for free, with optional Premium plans unlocking additional tools, customization, statistics, and features. Built by a reader who wanted a better way to manage the beautifully chaotic world of ARCs. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms & Conditions: https://arc-library.com/terms Privacy Policy: https://arc-library.com/privacy
Understory
This app helps you track your reading progress, set goals, and build a consistent reading habit. It features a unique plant aesthetic, social interaction with friends, and the ability to grow real-world trees by meeting reading objectives. Organize your library, share recommendations, and gain insights into your reading habits.
- Track reading progress and log books
- Set reading goals and streaks
- Grow real-world trees by meeting objectives
- Social features for book groups and friends
- Organize library with custom lists
- Share book recommendations
- View reading statistics and insights
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Understory is a reading tracker, book tracker, and social reading app designed to help you track books, log reading progress, set reading goals, and stay consistent. Whether you’re organizing your bookshelf, building a reading habit, or joining a book group, Understory brings together everything you need in one place with a fun plant aesthetic. Join the Understory bookish community to build a better reading habit and build a better world! GROW REAL-LIFE TREES: Watch your garden bloom in Understory and meet monthly objectives to grow real-world trees! Visit friends’ gardens daily to help their trees grow! INTERACT WITH FRIENDS: Join book groups where you and your friends can read different books! Like and comment on reviews in the social feed! TRACK YOUR READING: Review your books with half stars, audiobook tags and private reads! Manage your library with custom reading lists including a Did Not Finish (DNF) list! LEVEL UP YOUR READING: Improve your reading habit with leaderboards for books read, reading streaks, and XP level! Earn XP by logging reading and interacting with other users! SHARE BOOK RECS: See your friends’ favorite and highly rated books and share book recommendations directly with your friends! SEE YOUR STATS: Get insights on your reading history and social interactions through shareable stats and graphs and our signature Library Card graphic! Understory is perfect for readers who want to: - Track books and reading progress in one place - Build a daily reading habit and reading streak by growing a fun garden that doesn’t feel like a chore - Log books, reviews, and ratings (with half stars!) - Organize a TBR (to be read) list - Track audiobooks and ebooks - Join a social book community - Discover new book recommendations Terms of Use: https://www.understory-app.com/terms-of-use Privacy Policy: https://www.understory-app.com/privacy-policy Content and Copyright Policy: https://www.understory-app.com/content-copyright-policy
Screenshots
Verdict
The clearest difference is chart position: Understory at #207 against The ARC Library's unranked. Understory also leads on ratings volume (55 vs 12). On price, rating, review sentiment and update cadence 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. The ARC Library sells 8 in-app purchases, starting at $2.99 per month and Understory sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for The ARC Library against 4.9 for Understory. Both are backed by a comparable volume of ratings — 12 and 55 respectively. Written reviews are what separate them: 100% of The ARC Library's written reviews are positive against 96% of Understory's.
Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | The ARC Library | Understory |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (12 ratings) — better | 4.9 (55 ratings) |
| Positive reviews | 100.0% of reviews — better | 95.7% of reviews |
| Number of ratings | 12 | 55 — better |
| Update frequency | Every 9 days | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Best chart rank | — | #207 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 111 MB | 171 MB |
| Age rating | 9+ | 12+ |
| Developer | Romana Adamka | Understory Studios LLC |
Customer experience
The ARC Library
Understory
In-app purchases
The ARC Library
- ARC Addon (Monthly)$2.991 Month
- ARC Library Premium (Monthly)7 Days trial$7.991 Month
- Authors Monthly$9.991 Month
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- Combo Plan Monthly$12.991 Month
- ARC Addon (Yearly)$29.991 Year
- ARC Library Premium (yearly)7 Days trial$79.991 Year
- Author Yearly$99.991 Year
- Combo Yearly$129.991 Year
Understory
- Understory Premium1 Month trial$4.991 Month
- Understory Premium - Monthly$4.991 Month
- Understory Premium1 Year trial$49.991 Year
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- Understory Premium - Yearly$49.991 Year
- Streak Freeze$0.99
- Streak Restore$0.99








