Comparison

Altadena Library District vs Understory

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

Head to head
About

Altadena Library District

Features
Read full description

The Altadena Library District allows patrons and students to connect with district libraries and services through a mobile app. With the Altadena Library District app, patrons can search the catalog, place holds, reserve & renew materials, check out items, check fines, download & play ebooks and audiobooks. Patrons and library staff can also view and register for events, reserve rooms, access printing services, follow social channels, and more.

About

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.

Highlights
  • 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
Features
Read full description

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

Altadena Library District4 screens
Understory4 screens

Verdict

The call

The clearest difference is in-app purchases: Altadena Library District at none against Understory's 6. Understory's advantage is update cadence (every 9 days vs every 16 months). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Understory sells 6 in-app purchases, starting at $4.99 per month. Altadena Library District asks for nothing beyond the download.

UpkeepUpdate frequency

Altadena Library District ships an update every 16 months, Understory every 9 days. The most recent releases landed on September 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Altadena Library District versus Understory: the parameters behind the verdict, then further details
ParameterAltadena Library DistrictUnderstory
PriceFreeFree
Rating—4.9 (60 ratings) — better
Positive reviews—95.8% of reviews
Number of ratings—60 — better
Update frequencyEvery 16 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.1 — better
Further details — not scored
Size44 MB171 MB
Age rating4+12+
DeveloperAltadena Library DistrictUnderstory Studios LLC

In-app purchases

None

Altadena Library District

No in-app purchases

6 purchases

Understory

Subscriptions4
  • Understory Premium1 Month trial$4.991 Month
  • Understory Premium - Monthly$4.991 Month
  • Understory Premium1 Year trial$49.991 Year
Show 1 more
  • Understory Premium - Yearly$49.991 Year
One-time2
  • Streak Freeze$0.99
  • Streak Restore$0.99

Questions

Is Altadena Library District free?
Altadena Library District is free to download, with no in-app purchases.
Is Understory free?
Understory is free to download, with in-app purchases available.
Do Altadena Library District or Understory have ads?
Neither Altadena Library District nor Understory shows ads.
Which is updated more often, Altadena Library District or Understory?
Altadena Library District ships an update every 16 months, and Understory every 9 days. Most recently, Altadena Library District was updated on September 30, 2026 and Understory on October 31, 2026.

Other comparisons