# SDCL vs Since the Big Bang

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.

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.

## The numbers

| Metric | SDCL | Since the Big Bang |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (29 ratings)](https://appshunter.io/ios/app/sdcl/id1568549261/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/since-the-big-bang/id6804912974/reviews)** |
| Number of ratings | **29** | 1 |
| Positive reviews | 35.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | Free | Free |
| Size | 22 MB | 48 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [County of San Diego](https://appshunter.io/developer/561734090) | [Ruisheng Zhouren](https://appshunter.io/developer/1635278739) |

## What reviewers say

### SDCL

[App page](https://appshunter.io/ios/app/sdcl/id1568549261)

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.

**Highlights:** Search library catalog, Manage account, Request/renew items, Find library locations, View library hours, Connect on social media

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


### Since the Big Bang

[App page](https://appshunter.io/ios/app/since-the-big-bang/id6804912974)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is SDCL free?

SDCL is free to download, with no in-app purchases.

### Is Since the Big Bang free?

Since the Big Bang is free to download, with no in-app purchases.

### Which has better reviews, SDCL or Since the Big Bang?

Since the Big Bang is rated higher. SDCL averages 2.7 out of 5 from 29 ratings, while Since the Big Bang averages 5.0 from 1 ratings.

### Do SDCL or Since the Big Bang have ads?

Neither SDCL nor Since the Big Bang shows ads.

### Which is updated more often, SDCL or Since the Big Bang?

SDCL ships an update every 3 months, and Since the Big Bang every 8 days. Most recently, SDCL was updated on November 3, 2026 and Since the Big Bang on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*