Supported Features
-
VoiceOver
-
Dark Interface
Osmium Chat
Fast & stable chat
Only for iPhone
Free
iPhone
Osmium combines the features of modern chat apps with the stability and reliability of mainstream platforms, all for free.
FAST
- Built on a network of servers distributed around the world to keep messaging and voice fast anywhere.
OPEN
- Free, public API lets developers build custom bots, integrations, and clients without restrictions.
RELIABLE
- Built to deliver your messages even on slow or unstable connections.
PRIVATE
- Your data is stored in your region in our custom-build private infrastructure.
INDEPENDENT
- Privately owned and privacy first - no ads, no data harvesting, just messaging.
- Added reply quotes, cloaking, embeds, and user icons
- Added file/attachment support, with long-press file picker
- Reworked profiles, message grids, and message width for better media
- Status switching (idle/invisible), settings moved to community list
- Friends tab and auth screen improvements
The developer, Uncollapse, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Uncollapse LLC
- Size
- 54.5 MB
- Category
- Social Networking
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Contains
Messaging and Chat
User-Generated Content
- Copyright
- © 2026 Uncollapse