# Sustainable Libraries vs Hamilton Quad

The clearest difference is update cadence: Hamilton Quad at fortnightly against Sustainable Libraries's every 66 months. Sustainable Libraries's advantage is iOS requirement (12.0 vs 18.0). On price, rating, ratings volume 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.

On the App Store both sit at effectively the same score — 5.0 for Sustainable Libraries against 5.0 for Hamilton Quad. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Sustainable Libraries ships an update every 66 months, Hamilton Quad fortnightly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sustainable Libraries | Hamilton Quad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sustainable-libraries/id1170914405/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/hamilton-quad/id6768003169/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 66 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 12 MB | 117 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Capira Technologies](https://appshunter.io/developer/1010559443) | [HC Student Assembly](https://appshunter.io/developer/1028206619) |

## What reviewers say

### Sustainable Libraries

[App page](https://appshunter.io/ios/app/sustainable-libraries/id1170914405)

This app guides library staff through making their institutions more sustainable and resilient. It offers practical steps, resources, and tools to foster environmentally sound, economically feasible, and socially equitable practices.

**Highlights:** Sustainability roadmap guidance, Checklists for sustainable practices, Notes feature for planning, News feed for updates, Content sharing capabilities, Step-by-step task breakdown

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

**In-app purchases:** none


### Hamilton Quad

[App page](https://appshunter.io/ios/app/hamilton-quad/id6768003169)

Connect with the Hamilton community through a personalized hub. Access an alumni directory, volunteer opportunities, event listings, news, and groups. Find countless ways to engage and stay connected.

**Highlights:** Alumni directory, Volunteering information, Giving history, Event listings, Community news, Group connections

**In-app purchases:** none


## Frequently asked questions

### Is Sustainable Libraries free?

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

### Is Hamilton Quad free?

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

### Which has better reviews, Sustainable Libraries or Hamilton Quad?

Sustainable Libraries and Hamilton Quad are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Sustainable Libraries or Hamilton Quad have ads?

Neither Sustainable Libraries nor Hamilton Quad shows ads.

### Which is updated more often, Sustainable Libraries or Hamilton Quad?

Sustainable Libraries ships an update every 66 months, and Hamilton Quad fortnightly. Most recently, Sustainable Libraries was updated on October 29, 2026 and Hamilton Quad on October 31, 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.*