# SPIE Conferences vs SPL Mobile

The clearest difference is rating: SPL Mobile at 4.7 against SPIE Conferences's 3.8. SPL Mobile also leads on review sentiment (67% vs 25%) and monetization model (free vs ad-supported). SPIE Conferences's advantage is update cadence (every 3 weeks vs every 3 months) and iOS requirement (14.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

SPL Mobile holds the better App Store score, 4.7 against 3.8. Both are backed by a comparable volume of ratings — 9 and 12 respectively. Written reviews point the same way: 25% of SPIE Conferences's written reviews are positive against 67% of SPL Mobile's.

SPIE Conferences ships an update every 3 weeks, SPL Mobile every 3 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SPIE Conferences | SPL Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (9 ratings)](https://appshunter.io/ios/app/spie-conferences/id349678364/reviews) | **[4.7 (12 ratings)](https://appshunter.io/ios/app/spl-mobile/id1512423786/reviews)** |
| Number of ratings | 9 | **12** |
| Positive reviews | 25.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Ad-supported | **Free** |
| Size | 143 MB | 22 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SPIE](https://appshunter.io/developer/349678367) | [City of Sunnyvale](https://appshunter.io/developer/807509152) |

## What reviewers say

### SPIE Conferences

[App page](https://appshunter.io/ios/app/spie-conferences/id349678364)

Access comprehensive program and exhibition guides for all SPIE conferences and events. Organize your schedule, take notes, and find exhibitors with interactive floor plans. Stay informed about upcoming sessions and connect with the optics and photonics community.

**Highlights:** Complete conference programs, Sync schedule between devices, Event reminders, Add notes to events and exhibitors, Search and filter options, Venue floor plans

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

**In-app purchases:** none


### SPL Mobile

[App page](https://appshunter.io/ios/app/spl-mobile/id1512423786)

Access library services on the go with this mobile app. Search the collection, place holds, renew items, and discover new titles. Download eBooks and eAudiobooks, and stay updated on library information.

**Highlights:** Search library collection with filters, Browse bestsellers and new releases, View title details and community reviews, Place and manage holds, Renew borrowed items, Download eBooks and eAudiobooks

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

**In-app purchases:** none


## Frequently asked questions

### Is SPIE Conferences free?

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

### Is SPL Mobile free?

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

### Which has better reviews, SPIE Conferences or SPL Mobile?

SPL Mobile is rated higher. SPIE Conferences averages 3.8 out of 5 from 9 ratings, while SPL Mobile averages 4.7 from 12 ratings.

### Do SPIE Conferences or SPL Mobile have ads?

Neither SPIE Conferences nor SPL Mobile shows ads.

### Which is updated more often, SPIE Conferences or SPL Mobile?

SPIE Conferences ships an update every 3 weeks, and SPL Mobile every 3 months. Most recently, SPIE Conferences was updated on November 1, 2026 and SPL Mobile 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.*