# Baltimore Co Public Library vs Thinline

The clearest difference is in-app purchases: Baltimore Co Public Library at none against Thinline's 3. Baltimore Co Public Library also leads on device support (3 vs 1). Thinline's advantage is update cadence (every 2 days vs monthly). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Thinline sells 3 in-app purchases, starting at $6.99 per month. Baltimore Co Public Library asks for nothing beyond the download.

Baltimore Co Public Library ships an update monthly, Thinline every 2 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Baltimore Co Public Library | Thinline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (15 ratings)](https://appshunter.io/ios/app/baltimore-co-public-library/id1670140914/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free | — |
| Size | 50 MB | 82 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Baltimore County, Maryland](https://appshunter.io/developer/950779908) | [Josip Miljak](https://appshunter.io/developer/6805523661) |

## What reviewers say

### Baltimore Co Public Library

[App page](https://appshunter.io/ios/app/baltimore-co-public-library/id1670140914)

Discover library materials, resources, services, and events. Access the catalog, reserve items, register for events, and download digital content. Connect with staff for assistance and manage your reading lists.

**Highlights:** Catalog access, Material reservations and renewals, Event registration, Digital collection downloads, Staff chat support, Virtual shelves for booklists

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Thinline

[App page](https://appshunter.io/ios/app/thinline-private-sin-tracker/id6805523659)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thinline Monthly | $6.99 | per month |
| Thinline Annual | $29.99 | per year |
| Thinline Founders Offer | $39.99 | one-time |


## Frequently asked questions

### Is Baltimore Co Public Library free?

Baltimore Co Public Library is free to download, with no in-app purchases.

### Is Thinline free?

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

### Do Baltimore Co Public Library or Thinline have ads?

Neither Baltimore Co Public Library nor Thinline shows ads.

### Which is updated more often, Baltimore Co Public Library or Thinline?

Baltimore Co Public Library ships an update monthly, and Thinline every 2 days. Most recently, Baltimore Co Public Library was updated on October 2, 2026 and Thinline on October 9, 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.*