# UD Library Self vs AstroCaddy

The clearest difference is in-app purchases: UD Library Self at none against AstroCaddy's 3. UD Library Self also leads on device support. On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. AstroCaddy sells 3 in-app purchases, starting at $4.99 per month. UD Library Self asks for nothing beyond the download.

UD Library Self ships an update fortnightly, AstroCaddy every 9 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | UD Library Self | AstroCaddy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/astrocaddy/id6774392542/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 356 MB | 65 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 17+ | 12+ |
| Developer | [Meescan Inc.](https://appshunter.io/developer/1609729285) | [Luke Vandevere](https://appshunter.io/developer/6774392544) |

## What reviewers say

### UD Library Self

[App page](https://appshunter.io/ios/app/ud-library-self-checkout/id1601504594)

**Features:** macOS Compatibility

**In-app purchases:** none


### AstroCaddy

[App page](https://appshunter.io/ios/app/astrocaddy/id6774392542)

Log astronomical observations, track the value of your equipment, and connect with a community of fellow stargazers. Catalog your gear, record celestial objects, and share your discoveries.

**Highlights:** Log astronomical observations, Track equipment value, Catalog telescopes and accessories, Share observations with community, Join astronomy groups, Leaderboards for points and net worth

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $39.99 | per year |
| Premium Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is UD Library Self free?

UD Library Self is free to download, with no in-app purchases.

### Is AstroCaddy free?

AstroCaddy is free to download, with in-app purchases available.

### Which is updated more often, UD Library Self or AstroCaddy?

UD Library Self ships an update fortnightly, and AstroCaddy every 9 days. Most recently, UD Library Self was updated on October 28, 2026 and AstroCaddy on October 24, 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.*