LA County Library vs Self Study CS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LA County Library
Access a vast collection of books, movies, and music from your local library. Manage your account, place holds, find branches, and discover upcoming events.
- Search catalog
- Place holds
- Manage account
- Find locations
- Reserve study rooms
- View events
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Take LA County Library with you wherever you go! Search our catalog, place holds, manage your account, find a location near you, reserve a study room, view our upcoming events, and more!
Self Study CS
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The best way to self-learn Computer Science — hundreds of CS topics, offline, beautifully formatted for iPhone and iPad.Self-Study CS is a focused reader for the open CS Self-Learning guide: hundreds of computer-science topics in Markdown, optimized for long reading sessions on iPhone and iPad. WHAT YOU GET • Offline catalog — Explore bundled chapters by topic; switch between English (.en.md) and Chinese primary files when both exist. • Reader built for technical text — Comfortable light, dark, and sepia themes, adjustable text size and line spacing, and a table of contents for quick jumps. • Pick up where you left off — Continue reading and per-chapter scroll progress. • Bookmarks — Save chapters and open them from one place. MY GUIDES Create your own course-style notes with optional sections inspired by the bundled template. Content is stored locally on your device in a private database—not on our servers.
Screenshots
Verdict
The clearest difference is ads: LA County Library at none against Self Study CS's shown. LA County Library also leads on chart position (#208 vs unranked) and iOS requirement (16.0 vs 18.0). Self Study CS's advantage is update cadence (daily vs every 2 months). On price, in-app purchases and device support 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.
LA County Library ships an update every 2 months, Self Study CS daily. The most recent releases landed on October 5, 2026 and September 20, 2026 respectively.
| Parameter | LA County Library | Self Study CS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (78 ratings) — better | — |
| Positive reviews | 30.0% of reviews | — |
| Number of ratings | 78 — better | — |
| Update frequency | Every 2 months | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Best chart rank | #208 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 44 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | LA County Library | APPS BAY LIMITED |
In-app purchases
LA County Library
No in-app purchases
Self Study CS
No in-app purchases
Questions
Is LA County Library free?
Is Self Study CS free?
Do LA County Library or Self Study CS have ads?
Which is updated more often, LA County Library or Self Study CS?
Other comparisons
