# zostr — nostr for the zcash community

> Public social networking and shielded Zcash payments using .zcash names on the Nostr network. (iPhone/iPad app by Principle Zero Labs LLC.)

- Source: https://appshunter.io/ios/app/zostr/id6789480385 (this page in markdown: same URL + `.md`)
- Developer: [Principle Zero Labs LLC](https://appshunter.io/developer/6776851747)
- Category: Social Networking, Finance
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 17+
- Requires: iOS 16.4 · 65 MB
- Languages: American English
- Released: 2026-08-15
- Data updated: 2026-08-30
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/zostr/id6789480385/reviews.md

## What is zostr?

zostr is a public social app for the Zcash community, built on the open Nostr network. Your identity isn't an email or a phone number. It's your own .zcash name.

PUBLIC SOCIAL, SHIELDED MONEY
Posts, profiles, and who you follow work like any public feed. The one thing that's genuinely private is money: send shielded ZEC to any name, protected exactly as it is in any Zcash wallet.

We won't pretend the whole app is private just because it's built on Zcash. The honest breakdown:
• Posts, profile, and follows — public
• Direct messages — end-to-end encrypted (NIP-17)
• Payments — shielded

YOUR NAME IS YOUR IDENTITY
You're alice.zcash, not an account on a server. Your .zcash name is verified across the Nostr network (NIP-05), so other Nostr apps recognize you too. zostr is a window onto an open network, not a walled garden.

SHIELDED PAYMENTS, NOT ZAPS
Send shielded ZEC to any name straight from a post or profile. zostr resolves the name to a Zcash address and hands a standard payment request to your own wallet. It never holds, routes, or sees your funds. No custodian, no middleman.

KEYS STAY ON YOUR DEVICE
Your signing key is generated on your device and encrypted with your passphrase. The secret never leaves your iPhone, and your .zcash name is your recovery root. Unlock with your passphrase or Face ID.

NOTHING TO LEAK
No ads. No trackers. No analytics. No email or phone number required to be someone on zostr.

BUILT ON OPEN PROTOCOLS
Identity is ZcashNames. Transport is Nostr. Messages use NIP-17. Payments use ZIP-321 to your own wallet. If zostr disappeared tomorrow, your identity, posts, and follows would still live on the network and work in other Nostr apps. That's the point.

zostr is independent: no ads, no token, no investors. Just an effort to make .zcash names a real identity, and to make sending shielded ZEC to a person as easy as mentioning them.

Public social. Shielded money.

## Key features

- Public social feed
- End-to-end encrypted direct messages
- Shielded ZEC payments
- .zcash name identity
- Nostr network integration
- Key management on device


## Frequently asked questions about zostr

### What is zostr?

zostr is a public social application for the Zcash community built on the open Nostr network. It allows users to post, follow others, and send shielded ZEC payments using their .zcash name as their identity.

### How does zostr handle privacy?

While posts, profiles, and follows are public, direct messages are end-to-end encrypted using NIP-17. Payments are shielded and handled by your own Zcash wallet, ensuring your funds are private. The app also states it has no ads, trackers, or analytics.

### Is zostr free to use?

Yes, zostr is available for free. The application does not have ads, in-app purchases, or a token, and is developed independently.

### How is my identity managed on zostr?

Your identity on zostr is your .zcash name, such as alice.zcash, which is verified across the Nostr network (NIP-05). This name serves as your recovery root, and your signing key is generated and encrypted on your device.

### Can I send Zcash through zostr?

Yes, you can send shielded ZEC directly from a post or profile. zostr resolves the .zcash name to a Zcash address and initiates a payment request to your existing Zcash wallet, without holding or seeing your funds.

### What devices does zostr support?

Based on the provided data, zostr is currently supported on iPhone devices.

### How often is zostr updated?

The application was last updated on August 15, 2026, with version 1.0. This indicates it is a recent release, and further updates would be expected to follow.

### Does zostr have ads?

No, zostr is ad-free. The app explicitly states 'No ads. No trackers. No analytics.'

## Version history (last 1 release)

### 1.0 — 2026-08-15

No release notes.

## More apps by Principle Zero Labs LLC

- [Cotravel: Adventure Together](https://appshunter.io/ios/app/cotravel-adventure-together/id6776851745)

All apps by Principle Zero Labs LLC: https://appshunter.io/developer/6776851747

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*