# AR Mail From Harbin — St. Sophia on AR postcards

> Augmented reality app for building a 3D model of St. Sophia church using postcards. (iPhone/iPad app by Woongki Sung.)

- Source: https://appshunter.io/ios/app/ar-mail-from-harbin/id1292855058 (this page in markdown: same URL + `.md`)
- Developer: [Woongki Sung](https://appshunter.io/developer/1268424340)
- Category: Entertainment, Travel
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 11.0 · 123 MB
- Languages: English
- Released: 2017-10-05
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ar-mail-from-harbin/id1292855058/reviews.md

## What is AR Mail From Harbin?

* In order to use this app, you need the "AR Mail from Harbin" postcards. If you do not have them ready on hands,  please visit the site below, download the postcards, and print them. 

http://uqr.to/armail

* This project was presented at Siggraph 2017.
* This project was nominated for two categories in Unity Awards 2017.


"AR Mail from Harbin" is a small augmented reality (AR) application that works with a set of postcards. Each postcard is printed with a portion of the plan of St. Sophia, the main church in the center of the city of Harbin. A user can assemble a 3D model of the building by laying out the postcards in the proper composition. By combining a photogrammetric capture of the church, AR technology, and traditional paper media, this tool enhances visitors’ experience at the historical location, increases their understanding of its spatial design, and promotes social interaction between the visitors on site and their friends in remote locations, all in a playful setting.

## Key features

- Augmented reality experience
- 3D model assembly
- Interactive postcard use
- Historical site enhancement
- Promotes social interaction


## Frequently asked questions about AR Mail From Harbin

### What do I need to use AR Mail From Harbin?

To use AR Mail From Harbin, you need the "AR Mail from Harbin" postcards. These can be downloaded and printed from the provided link in the app description.

### What is AR Mail From Harbin?

AR Mail From Harbin is an augmented reality application that allows users to assemble a 3D model of St. Sophia church by arranging special postcards. It was presented at Siggraph 2017 and nominated for Unity Awards.

### What devices does AR Mail From Harbin support?

AR Mail From Harbin supports iPhones, iPads, and iPods, as indicated by its compatibility with iOS devices.

### Is AR Mail From Harbin free to use?

Yes, AR Mail From Harbin is available for free. There are no in-app purchases or subscription fees associated with its use.

### What is the age rating for AR Mail From Harbin?

AR Mail From Harbin has an age rating of 4+, making it suitable for a wide range of users.

### When was AR Mail From Harbin last updated?

The latest version of AR Mail From Harbin, version 2.15, was last updated on June 24, 2019.

### How does AR Mail From Harbin enhance the visitor experience?

AR Mail From Harbin enhances the visitor experience by allowing them to interactively build a 3D model of St. Sophia church, increasing their spatial understanding and promoting social interaction.

### Does AR Mail From Harbin have ads?

The provided data does not specify whether AR Mail From Harbin contains advertisements. However, it is listed as free with no in-app purchases.

## Version history (last 1 release)

### 2.15 — 2019-06-24

Stabilized tracking capability.
Improved UI.
Pinch zoom enabled.

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## More apps by Woongki Sung

- [The GEAR.sg App](https://appshunter.io/ios/app/the-gearsg-app/id6450877144)

All apps by Woongki Sung: https://appshunter.io/developer/1268424340

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*