Undernote
A map, your notes, your rules
Only for iPhone
Free
iPhone
Undernote is a calm social network that lives on the map.
You write a note: a few words, some photos. You place it at a precise spot, right here or across the world. Then everything is set note by note:
• From where people see it exists: its dot shows on the map within 500 m, across the whole city, or from everywhere.
• From where it can be read: a shorter distance than the first. Beyond it, people see the dot and the distance left, not the content.
• Who can read it: public, mutuals, named people (picked one by one), or just you.
• How long it lives: one day, one week, one month, forever.
DISCOVER
Around you, the map carries other people's notes. Some can be read right where you stand; others only show that they exist, and the distance left. To read them, you go.
An echo anchors a note you love a second time, right where you are: people around you can now find it too. A thread links two of your notes: whoever reads one learns the other exists, and where.
No endless feed: the discovery page stops, and the rest is found by walking.
YOUR PRIVACY
• Who can read you rests on consent: "mutuals" means you both follow each other, nothing less.
• Your position is never shown to others: only your notes appear, at the spots you chose.
• An expired note is deleted, not archived.
The city gone dark, the words lit up.
Questions: hello@undernote.app
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A small update.
• New setting in Settings, Privacy: help Undernote find out whether its ads actually work, if you accept. Off by default, nothing is sent without your consent.
• Notifications about a co-posted note open correctly again.
• Privacy policy updated (section 8).
• Fixes.
The developer, Pierre Ostrowiecki, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Pierre Ostrowiecki
- Size
- 60.9 MB
- Category
- Social Networking
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
English and 18 more
- English, Basque, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Vietnamese
- Age Rating
16+
- 16+
- Frequent
Cartoon or Fantasy Violence
Infrequent
Realistic Violence
Profanity or Crude Humor
Mature or Suggestive Themes
Horror/Fear Themes
Alcohol, Tobacco, Drug Use or References
Sexual Content or Nudity
Contains
Messaging and Chat
User-Generated Content
Social Media
- Copyright
- © 2026 Undernote