# The Identifiers vs SFPL

The clearest difference is rating: SFPL at 4.0 against The Identifiers's 2.0. SFPL also leads on ratings volume (50 vs 8). The Identifiers's advantage is iOS requirement (9.0 vs 16.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SFPL holds the better App Store score, 4.0 against 2.0. That said, the two scores are not equally well evidenced: SFPL has 50 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 26% of The Identifiers's written reviews are positive against 28% of SFPL's.

The Identifiers ships an update every 2 months, SFPL every 4 months. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | The Identifiers | SFPL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (8 ratings)](https://appshunter.io/ios/app/the-identifiers/id564618183/reviews) | **[4.0 (50 ratings)](https://appshunter.io/ios/app/sfpl/id952828394/reviews)** |
| Number of ratings | 8 | **50** |
| Positive reviews | 26.3% of reviews | **27.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 79 MB | 22 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shundor Apps](https://appshunter.io/developer/306257249) | [San Francisco Public Library](https://appshunter.io/developer/1591076880) |

## What reviewers say

### The Identifiers

[App page](https://appshunter.io/ios/app/the-identifiers/id564618183)

Easily retrieve your iOS device's Advertising Identifier. This diagnostic tool is particularly useful for mobile app developers and those in the advertising industry who need to debug applications.

**Highlights:** Retrieve Advertising Identifier, iOS device diagnostic tool, App debugging aid, Useful for advertising professionals

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

**In-app purchases:** none


### SFPL

[App page](https://appshunter.io/ios/app/sfpl/id952828394)

Access your local library's catalog from your mobile device. Browse new releases, manage holds, renew borrowed items, and discover upcoming events. Plan your library visits with ease, all from your pocket.

**Highlights:** Browse new titles and recommendations, Place and manage holds, Renew checked out materials, Plan library visits, See upcoming events

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

**In-app purchases:** none


## Frequently asked questions

### Is The Identifiers free?

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

### Is SFPL free?

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

### Which has better reviews, The Identifiers or SFPL?

SFPL is rated higher. The Identifiers averages 2.0 out of 5 from 8 ratings, while SFPL averages 4.0 from 50 ratings.

### Do The Identifiers or SFPL have ads?

Neither The Identifiers nor SFPL shows ads.

### Which is updated more often, The Identifiers or SFPL?

The Identifiers ships an update every 2 months, and SFPL every 4 months. Most recently, The Identifiers was updated on October 4, 2026 and SFPL on October 5, 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.*