# Threema for iOS

> iOS app of the instant messenger Threema

**Wikidata**: [Q101619028](https://www.wikidata.org/wiki/Q101619028)  
**Source**: https://4ort.xyz/entity/threema-for-ios

## Summary
Threema for iOS is the mobile application version of the instant messenger Threema, designed specifically to run on the iOS operating system. It is classified as free software and a mobile app, distributed digitally via the App Store. The application's source code is publicly hosted on GitHub, allowing for transparency and user verification.

## Key Facts
- **Entity Type:** Mobile application (Free software).
- **Platform:** iOS (Apple Inc.).
- **Distribution:** Distributed by App Store (Q368215); Digital download format.
- **App Store ID:** 578665578.
- **Source Code:** Publicly available at `https://github.com/threema-ch/threema-ios`.
- **Latest Recorded Version (in source):** 4.5.4 (Released June 8, 2020).
- **Copyright Status:** Copyrighted.
- **Official Website:** `https://threema.ch/en/open-source/`

## FAQs
### Q: Is Threema for iOS free software?
A: Yes, Threema for iOS is classified as free software. This means it is distributed under terms that allow users to freely run, study, change, and distribute it and modified versions.

### Q: Where can the source code for Threema for iOS be found?
A: The source code repository is hosted on GitHub at `https://github.com/threema-ch/threema-ios`. The official open-source information is available at `https://threema.ch/en/open-source/`.

### Q: What operating system is required to run Threema for iOS?
A: As indicated by its name and properties, the application runs on iOS, the mobile operating system developed by Apple Inc.

### Q: When was version 4.5.4 released?
A: According to the version history, version 4.5.4 was released on June 8, 2020.

## Why It Matters
Threema for iOS represents a significant intersection of proprietary mobile ecosystems and open-source software philosophy. While the iOS platform is tightly controlled by Apple Inc., the classification of Threema for iOS as "free software" distinguishes it from many other instant messaging applications on the App Store. By providing a public source code repository on GitHub, the developers offer transparency, allowing security researchers and users to verify the application's code and functionality.

This openness addresses growing concerns regarding data privacy and software integrity in mobile communication. As an instant messenger, it provides a communication channel that aligns with the principles of free software—allowing users the freedom to study and modify the code—while functioning within a mainstream commercial environment. The consistent update cycle evidenced by the version history (spanning from 2019 to 2020 in the provided data) demonstrates active maintenance and responsiveness to the iOS platform's evolution.

## Notable For
- **Open Source Nature:** Unlike many competitors, it is classified as free software with a publicly accessible source code repository.
- **Transparency:** Users can inspect the codebase directly via GitHub.
- **Platform Integration:** It is a specialized build for iOS, Apple's mobile operating system.
- **Active Development:** The source data indicates a frequent release schedule, with multiple versions (4.3.2 through 4.5.4) released between August 2019 and June 2020.

## Body

### Software Classification and Nature
Threema for iOS is explicitly defined as a **mobile app** and **free software**. As free software, it adheres to the definition of allowing users to freely run, study, change, and distribute the software. Despite being "free software," the application maintains a **copyrighted** status. It is designed exclusively for the **iOS** platform, the mobile operating system developed by Apple Inc.

### Distribution and Availability
The application is distributed in a **digital download** format. It is officially listed on the App Store with the identifier **578665578**. The distribution is managed by the entity identified as **Q368215** (App Store).

### Version History and Development
The application has a documented history of updates and version releases. The development timeline recorded in the source material includes the following releases:

- **Version 4.5.4:** Released 2020-06-08.
- **Version 4.5.3:** Released 2020-03-17.
- **Version 4.5.2:** Released 2020-03-15.
- **Version 4.5.1:** Released 2020-03-10.
- **Version 4.5:** Released 2020-02-25.
- **Version 4.4.3:** Released 2019-12-04.
- **Version 4.4.2:** Released 2019-11-13.
- **Version 4.4.1:** Released 2019-10-30.
- **Version 4.4:** Released 2019-10-29.
- **Version 4.3.2:** Released 2019-08-13.

### Technical Resources
The project maintains a public presence for developers and auditors. The source code is accessible at the repository URL `https://github.com/threema-ch/threema-ios`. General open-source information and references are hosted on the official website at `https://threema.ch/en/open-source/`.

## References

1. [Version history](https://threema.ch/en/versionhistory#ios_4_5_4)
2. [Version history](https://threema.ch/en/versionhistory#ios_4_5_3)
3. [Version history](https://threema.ch/en/versionhistory#ios_4_5_2)
4. [Version history](https://threema.ch/en/versionhistory#ios_4_5_1)
5. [Version history](https://threema.ch/en/versionhistory#ios_4_5)
6. [Version history](https://threema.ch/en/versionhistory#ios_4_4_3)
7. [Version history](https://threema.ch/en/versionhistory#ios_4_4_2)
8. [Version history](https://threema.ch/en/versionhistory#ios_4_4_1)
9. [Version history](https://threema.ch/en/versionhistory#ios_4_4)
10. [Version history](https://threema.ch/en/versionhistory#ios_4_3_2)
11. [Version history](https://threema.ch/en/versionhistory#ios_4_3_1)
12. [Version history](https://threema.ch/en/versionhistory#ios_4_3)
13. [Version history](https://threema.ch/en/versionhistory#ios_4_2_3)
14. [Version history](https://threema.ch/en/versionhistory#ios_4_2_2)
15. [Version history](https://threema.ch/en/versionhistory#ios_4_2_1)
16. [Version history](https://threema.ch/en/versionhistory#ios_4_2)
17. [Version history](https://threema.ch/en/versionhistory#ios_4_1_3)
18. [Version history](https://threema.ch/en/versionhistory#ios_4_1_2)
19. [Version history](https://threema.ch/en/versionhistory#ios_4_1_1)
20. [Version history](https://threema.ch/en/versionhistory#ios_4_1)
21. [Version history](https://threema.ch/en/versionhistory#ios_4_0_3)
22. [Version history](https://threema.ch/en/versionhistory#ios_4_0_2)
23. [Version history](https://threema.ch/en/versionhistory#ios_4_0_1)
24. [Version history](https://threema.ch/en/versionhistory#ios_4_0)
25. [Version history](https://threema.ch/en/versionhistory#ios_3_0_9)
26. [Version history](https://threema.ch/en/versionhistory#ios_3_0_8)
27. [Version history](https://threema.ch/en/versionhistory#ios_3_0_6)
28. [Version history](https://threema.ch/en/versionhistory#ios_3_0_5)
29. [Version history](https://threema.ch/en/versionhistory#ios_3_0_4)
30. [Version history](https://threema.ch/en/versionhistory#ios_3_0_2)
31. [Version history](https://threema.ch/en/versionhistory#ios_3_0_1)
32. [Version history](https://threema.ch/en/versionhistory#ios_3_0)
33. [Version history](https://threema.ch/en/versionhistory#ios_2_10_2)
34. [Version history](https://threema.ch/en/versionhistory#ios_2_10_0)
35. [Version history](https://threema.ch/en/versionhistory#ios_2_9_1)
36. [Version history](https://threema.ch/en/versionhistory#ios_2_9_0)
37. [Version history](https://threema.ch/en/versionhistory#ios_2_8_1)
38. [Version history](https://threema.ch/en/versionhistory#ios_2_8_0)
39. [Version history](https://threema.ch/en/versionhistory#ios_2_7_5)
40. [Version history](https://threema.ch/en/versionhistory#ios_2_7_4)
41. [Version history](https://threema.ch/en/versionhistory#ios_2_7_3)
42. [Version history](https://threema.ch/en/versionhistory#ios_2_7_2)
43. [Version history](https://threema.ch/en/versionhistory#ios_2_7_1)
44. [Version history](https://threema.ch/en/versionhistory#ios_2_7_0)
45. [Version history](https://threema.ch/en/versionhistory#ios_2_6_2)
46. [Version history](https://threema.ch/en/versionhistory#ios_2_6_1)
47. [Version history](https://threema.ch/en/versionhistory#ios_2_6_0)
48. [Version history](https://threema.ch/en/versionhistory#ios_2_5_0)
49. [Version history](https://threema.ch/en/versionhistory#ios_2_4_3)
50. [Version history](https://threema.ch/en/versionhistory#ios_2_4_0)