# Project References vs c.guide

The clearest difference is update cadence: c.guide at weekly against Project References's every 4 months. Project References's advantage is iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Project References ships an update every 4 months, c.guide weekly. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Project References | c.guide |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free |
| Size | 67 MB | 59 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pilkington Group Ltd](https://appshunter.io/developer/1184941969) | [Fundación Arquitectura Contemporanea](https://appshunter.io/developer/1479853473) |

## What reviewers say

### Project References

[App page](https://appshunter.io/ios/app/project-references/id1474357446)

**Features:** macOS Compatibility

**In-app purchases:** none


### c.guide

[App page](https://appshunter.io/ios/app/cguide/id1479853474)

Explore contemporary architecture built since 1979 with this digital guide. It aims to promote recognition of quality architecture globally and foster public understanding of its role in urban development. Discover the importance of cities, public spaces, and architecture in citizens' lives.

**Highlights:** Explore architecture built since 1979, Promote recognition of quality architecture, Understand architectural practice in urban development, Raise awareness of city and public space importance, Spark interest in architecture for all

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Project References free?

Project References is free to download, with no in-app purchases.

### Is c.guide free?

c.guide is free to download, with no in-app purchases.

### Do Project References or c.guide have ads?

Neither Project References nor c.guide shows ads.

### Which is updated more often, Project References or c.guide?

Project References ships an update every 4 months, and c.guide weekly. Most recently, Project References was updated on September 24, 2026 and c.guide on September 23, 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.*