# X-PUB — Watch Only Bitcoin Wallet

> Open-source Bitcoin watch-only wallet for generating unlimited invoices offline. (iPhone/iPad app by Denton LLC.)

- Source: https://appshunter.io/ios/app/x-pub/id1453821376 (this page in markdown: same URL + `.md`)
- Developer: [Denton LLC](https://appshunter.io/developer/1518143305)
- Category: Utilities, Finance
- Price: Free
- Rating: 3.50/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 18 MB
- Languages: American English
- Released: 2019-02-26
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/x-pub/id1453821376/reviews.md

## What is X?

X-PUB is an open sourced Bitcoin watch only wallet that allows you to scan or upload an xpub and then programmatically create an infinite amount of invoices. The code can be found here https://github.com/FontaineDenton/X-PUB 

X-PUB is designed to work with BIP39 generated xpubs that use BIP44 derivation path. This is the default option on https://iancoleman.io/bip39/ and the website can be downloaded and used offline to verify X-PUB addresses.

X-PUB checks if the address has ever been used on the Bitcoin blockchain and if it has it turns the background red alerting the user. If the address has never been used it turns the background green. If the app is offline then background remains orange.

This allows users to create a new address for every Bitcoin payment they may want to receive without having to store their private keys on the device. The xpub is encrypted with a random key that is generated programmatically and then stored on your devices keychain where it is secure even from being jailbroken by a hacker. We then use that key to decrypt the xpub whenever you create a new invoice. Every time you open the app the index for the address will increment up by one, the user may also manually increment the index up and down. The QR Code will change in real time. The user may share the QR Code or just the address by tapping on either.

X-PUB works 100% offline with no internet connection and we don't share anything from the app to the internet.

Users may enter an amount denominated in Bitcoin and a description label that is all BIP21 compatible, as most well known Bitcoin wallets are.

## Key features

- Generate unlimited Bitcoin invoices
- Watch-only wallet for enhanced security
- Offline operation
- Address usage verification
- BIP21 compatible invoices
- Encrypted xpub storage

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/x-pub/id1453821376/reviews.md

### 2/5 — Can’t scan code

*2020-09-04, version 1.1*

I scan a code, it vibrates, then doesn’t add the wallet.  Doesn’t work.

## Frequently asked questions about X

### What is X-PUB?

X-PUB is an open-source Bitcoin watch-only wallet. It allows you to generate an infinite amount of invoices from an extended public key (xpub) without storing your private keys on your device. It operates 100% offline.

### How does X-PUB ensure security?

X-PUB stores your xpub encrypted with a random key in your device's keychain, making it secure even from jailbroken devices. It also checks if an address has been used on the Bitcoin blockchain, alerting you visually.

### Can I use X-PUB offline?

Yes, X-PUB works 100% offline with no internet connection required. The app does not share any data from the app to the internet.

### What Bitcoin derivation paths does X-PUB support?

X-PUB is designed to work with BIP39 generated xpubs that use the BIP44 derivation path. This is the default option on https://iancoleman.io/bip39/.

### How does X-PUB indicate address usage?

If an address has been used on the Bitcoin blockchain, the background turns red. If it has never been used, the background turns green. If the app is offline, the background remains orange.

### What information can I include in an invoice with X-PUB?

You can enter an amount denominated in Bitcoin and a description label. This information is BIP21 compatible, which is supported by most well-known Bitcoin wallets.

### What is the update frequency for X-PUB?

The latest version is 1.1, last updated on March 8, 2019. Future updates will depend on developer activity.

### What devices does X-PUB support?

X-PUB is available for iPhone and iPod devices. It has an age rating of 4+.

## Version history (last 2 releases)

### 1.1 — 2019-03-08

-Now see if the address has ever been used, the background color will turn green if unused, red if used, orange if no wifi connection.
-Balance will also display above the address label.
-Clarifications and spelling fixes in info page.

### 1.0 — 2019-02-25

No release notes.

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## More apps by Denton LLC

- [Fully Noded](https://appshunter.io/ios/app/fully-noded/id1436425586)
- [ColdKeys](https://appshunter.io/ios/app/coldkeys/id1452167723)
- [FN - Bitcoin Core](https://appshunter.io/ios/app/fn-bitcoin-core/id6450649419)
- [Plasma - Core Lightning Wallet](https://appshunter.io/ios/app/plasma-core-lightning-wallet/id6468914352)
- [Unify - Payjoin Wallet](https://appshunter.io/ios/app/unify-payjoin-wallet/id6504735719)

All apps by Denton LLC: https://appshunter.io/developer/1518143305

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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 2026-06-10.*