# Sustainable Libraries vs LangGame

The clearest difference is in-app purchases: Sustainable Libraries at none against LangGame's 3. Sustainable Libraries also leads on iOS requirement (12.0 vs 17.0). LangGame's advantage is update cadence (every 5 days vs every 66 months). On price, ads and device support there is nothing between them.

Both are free to download. LangGame sells 3 in-app purchases, starting at $4.99 per month. Sustainable Libraries asks for nothing beyond the download.

Sustainable Libraries ships an update every 66 months, LangGame every 5 days. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Sustainable Libraries | LangGame |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sustainable-libraries/id1170914405/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 66 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 12 MB | 86 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Capira Technologies](https://appshunter.io/developer/1010559443) | [Muhammet ali Tasdemir](https://appshunter.io/developer/1833988785) |

## 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

**In-app purchases:** none


### LangGame

[App page](https://appshunter.io/ios/app/langgame-learn-languages/id6786339161)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium Discount | $29.99 | per year |
| Yearly Premium | $49.99 | per year |


## Frequently asked questions

### Is Sustainable Libraries free?

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

### Is LangGame free?

LangGame is free to download, with in-app purchases available.

### Do Sustainable Libraries or LangGame have ads?

Neither Sustainable Libraries nor LangGame shows ads.

### Which is updated more often, Sustainable Libraries or LangGame?

Sustainable Libraries ships an update every 66 months, and LangGame every 5 days. Most recently, Sustainable Libraries was updated on October 7, 2026 and LangGame on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*