Brezn is a Nostr progressive web app that shows posts by location, using geohashes to reduce location precision.
Brezn
Brezn shows local-area Nostr posts while reducing the user's position to a shortened geohash.
About Brezn
Brezn is an open-source Nostr client that shows posts from the user's local area. It reduces the user's position to a five-character geohash (roughly 5 × 5 km cells, depending on latitude) and shares only that cell, never exact coordinates. Feed radius is set by adjusting the geohash query length, where each length loads that cell and its eight neighboring cells in a single query. Because it is a client for the existing Nostr protocol rather than its own network, the same keys and relays show the same content in other Nostr apps. It can be installed as a Progressive Web App on Android and iOS, or via an Android APK. The developer states they do not host published content, operate relays, or process personal data; traffic goes directly to the relays and media hosts the user chooses, which can see the user's IP address.
Key features
- Local-area Nostr feed built on geohash tags
- Position reduced to a five-character geohash; exact coordinates not shared
- Feed radius set by geohash query length, loading cell plus eight neighbors
- Installable as a Progressive Web App, with an Android APK also available
- Best-effort stripping of identifying metadata from images and videos before upload
- Optional client-side filtering: keyword mute and pubkey block
Best for: Nostr users who want to read and post content from their own local area without revealing exact coordinates.
Good for
- Open source, with a live browser demo available
- Works with existing Nostr keys and relays, so content is visible in other clients
- Runs as an installed app on Android and iOS via PWA, plus an Android APK
Watch out for
- PWAs may have limited support in Safari on iOS
- Metadata removal from images and videos before upload is best-effort, not guaranteed
- Relays and media hosts chosen by the user can see the IP address and apply their own policies
Brezn at a glance
- Website
- github.com/DaBena/Brezn
- Category
- Social & Communities › Nostr
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android, iOS
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Brezn FAQ
Does Brezn share the user's exact location?
No. The position is reduced to a five-character geohash of roughly 5 × 5 km cells depending on latitude, and only that cell is shared.
How is the feed radius set?
By adjusting the geohash query length. Each length loads that cell and its eight neighbors in one query.
Where are keys and app settings stored?
In the browser local storage on the user's own device. Build artifacts are hosted on GitHub Pages.
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