SDCL vs Since the Big Bang
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SDCL
Access the San Diego County Library's catalog from your mobile device. Search for books, DVDs, audiobooks, and more. Manage your account, renew items, and find library locations and hours.
- Search library catalog
- Manage account
- Request/renew items
- Find library locations
- View library hours
- Connect on social media
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The official San Diego County Library app. Connect with us on your mobile device! Use the SDCL app to search for books, DVDs, audiobooks, CDs, and more. Check your account, request or renew items, find your nearest library location and hours, follow us on Facebook and Twitter, or contact us.
Since the Big Bang
Explore a comprehensive timeline of history, from the universe's origin to the present day. Zoom in on specific eras or events, search for details, and add your own personal moments to the shared historical narrative. Follow friends to see their events integrated into your view.
- Continuous historical timeline
- Pinch-to-zoom functionality
- Searchable historical events
- Add personal history
- Follow friends' events
- Privacy controls for personal events
- Event and profile reporting
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Since the Big Bang is a single continuous timeline of everything, from the origin of the universe to today. Pinch to zoom out and watch billions of years compress into a single view: the formation of Earth, the first life, the dinosaurs. Zoom in and the timeline narrows centuries, then years, then individual days. Pan anywhere along it and events appear where they happened in time. BROWSE FREELY No account needed. Explore the full timeline, search for any event, and read the details: wars, discoveries, inventions, art, disasters, and the people behind them. ADD YOUR OWN HISTORY Sign in and place your own moments on the same timeline as the rest of history. Choose who sees each one: • Just me: a private record only you can read • Followers: visible to people who follow you • Public: part of the shared timeline for the community Your first day at a new job sits next to Steve Jobs introducing the iPhone. That is the point. FOLLOW OTHER PEOPLE Find and follow friends to see their events woven into your timeline. Keep your account public, or make it private so you approve each follower. SAFETY Every event and profile can be reported or blocked. Reports are reviewed within 24 hours, and there is zero tolerance for objectionable content or harassment. Sign in with Apple or Google.
Screenshots
Verdict
The clearest difference is review sentiment: Since the Big Bang at 100% against SDCL's 36%. Since the Big Bang also leads on rating (5.0 vs 2.7) and update cadence (every 8 days vs every 3 months). SDCL's advantage is ratings volume (29 vs 1). On price, ads, in-app purchases and monetization model 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.
Since the Big Bang holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: SDCL has 29 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 36% of SDCL's written reviews are positive against 100% of Since the Big Bang's.
SDCL ships an update every 3 months, Since the Big Bang every 8 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | SDCL | Since the Big Bang |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (29 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 35.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 29 — better | 1 |
| Update frequency | Every 3 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 22 MB | 48 MB |
| Age rating | 4+ | 17+ |
| Developer | County of San Diego | Ruisheng Zhouren |
Customer experience
SDCL
Since the Big Bang
In-app purchases
SDCL
No in-app purchases
Since the Big Bang
No in-app purchases
