Undernote

A map, your notes, your rules

Only for iPhone

Free

iPhone

Notes on a map. You choose who sees them, from how far, and for how long. 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

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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 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:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Pierre Ostrowiecki
Size
  • 50.1 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.
Languages
English and 2 more
  • English, French, Spanish
Age Rating
16+
  • 16+
  • Learn More
  • 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
  • Developer Website
  • Privacy Policy