# Helen Plum Library vs QI Encyclopedia

The clearest difference is rating: QI Encyclopedia at 5.0 against Helen Plum Library's 3.0. Helen Plum Library's advantage is ratings volume (6 vs 2). On price, update cadence, 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.

QI Encyclopedia holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

Helen Plum Library ships an update every 5 weeks, QI Encyclopedia every 3 weeks. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Helen Plum Library | QI Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (6 ratings)](https://appshunter.io/ios/app/helen-plum-library/id6473308379/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/qi-encyclopedia/id6478165692/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 56 MB | 183 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Helen Plum Public Library](https://appshunter.io/developer/1718834047) | [Jennifer Foster](https://appshunter.io/developer/1732037473) |

## What reviewers say

### Helen Plum Library

[App page](https://appshunter.io/ios/app/helen-plum-library/id6473308379)

Access your library's collection from your mobile device. Search for books, movies, and games, place holds, check due dates, and renew items. Use the app as your digital library card for convenient access.

**Highlights:** Search catalog, Place holds, Check due dates, Renew items, Digital library card

**In-app purchases:** none


### QI Encyclopedia

[App page](https://appshunter.io/ios/app/qi-encyclopedia/id6478165692)

Access a comprehensive encyclopedia of public health quality improvement resources. Features include search, filtering, a table of contents, and a glossary. All content and graphics are available offline.

**Highlights:** Search and Filter, Selectable Table of Contents, Comprehensive Glossary, Offline Access to Content, All Text and Graphics Included

**In-app purchases:** none


## Frequently asked questions

### Is Helen Plum Library free?

Helen Plum Library is free to download, with no in-app purchases.

### Is QI Encyclopedia free?

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

### Which has better reviews, Helen Plum Library or QI Encyclopedia?

QI Encyclopedia is rated higher. Helen Plum Library averages 3.0 out of 5 from 6 ratings, while QI Encyclopedia averages 5.0 from 2 ratings.

### Do Helen Plum Library or QI Encyclopedia have ads?

Neither Helen Plum Library nor QI Encyclopedia shows ads.

### Which is updated more often, Helen Plum Library or QI Encyclopedia?

Helen Plum Library ships an update every 5 weeks, and QI Encyclopedia every 3 weeks. Most recently, Helen Plum Library was updated on October 9, 2026 and QI Encyclopedia 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.*