The Identifiers vs SFPL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Identifiers
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.
- Retrieve Advertising Identifier
- iOS device diagnostic tool
- App debugging aid
- Useful for advertising professionals
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The app makes it ridiculously easy to retrieve your iOS device's Advertising Identifier. It is helpful for anyone debugging mobile apps especially people working in advertising.
SFPL
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.
- Browse new titles and recommendations
- Place and manage holds
- Renew checked out materials
- Plan library visits
- See upcoming events
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San Francisco Public Library in your pocket. Browse new titles and recommendations curated by your library staff, place and manage holds, renew checked out materials, plan your visit and see upcoming events, anytime and anywhere.
Screenshots
Verdict
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.
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.
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.
| Parameter | The Identifiers | SFPL |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (8 ratings) | 4.0 (50 ratings) — better |
| Positive reviews | 26.3% of reviews | 27.9% of reviews — better |
| Number of ratings | 8 | 50 — better |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 79 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Shundor Apps | San Francisco Public Library |
Customer experience
The Identifiers
SFPL
In-app purchases
The Identifiers
No in-app purchases
SFPL
No in-app purchases
