# ColdKeys — Offline Bitcoin Key Creator

> Offline Bitcoin key creator for secure cold storage wallets. (iPhone/iPad app by Denton LLC.)

- Source: https://appshunter.io/ios/app/coldkeys/id1452167723 (this page in markdown: same URL + `.md`)
- Developer: [Denton LLC](https://appshunter.io/developer/1518143305)
- Category: Utilities, Finance
- Price: Free
- Rating: 4.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 10 MB
- Languages: American English
- Released: 2019-02-12
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/coldkeys/id1452167723/reviews.md

## What is ColdKeys?

ColdKeys has one job: create and import cold storage wallets for you. 

It works 100% with no internet and can be used airgapped.

All you need to do is write down your 12 or 24 word phrase and then you can use the app to receive bitcoin to your watch-only wallet for cold storage.

If you enable "Watch-Only" in settings it will remember the first 100 addresses that your seed can create. That way when you tap the "Watch-Only Wallet" it will show you the first address and give you the balance as well change colours to communicate whether the address has transaction history or not. It will turn red if the address has been used and green if it has not been used. This assists you to only use addresses once for privacy reasons. You can tap the + or - button to show the next address. This all happens in a pre determined order and will never change. 

The app only allows the industry standard BIP44 or BIP84 derivation scheme which is compatible with the majority of hardware wallets and apps. It also utilises BIP39 pass-phrases but that can be switched off in settings.

If one day you want to spend from your cold storage you would need to sweep the private key that is associated with that address which can be done in a number of apps. We recommend "Fully Noded" app for that.

ColdKeys is 100% open sourced and designed to be as simple as possible, the code is readable even to non technical individuals.

https://github.com/FontaineDenton/DiceKeys

## Key features

- Offline Bitcoin key creation
- Air-gapped operation
- 12 or 24-word phrase generation
- Watch-only wallet functionality
- Address usage indicators (red/green)
- BIP44/BIP84 derivation schemes
- Open-source code


## Frequently asked questions about ColdKeys

### What is ColdKeys used for?

ColdKeys is used to create and import secure offline Bitcoin wallets, also known as cold storage. It allows you to generate your private keys without an internet connection, enhancing security.

### Is ColdKeys safe to use?

Yes, ColdKeys is designed for offline use and can be operated in an air-gapped environment, meaning it does not require an internet connection. This significantly reduces the risk of online threats.

### Can I use ColdKeys to receive Bitcoin?

Yes, you can use ColdKeys to receive Bitcoin to your watch-only wallet. The app provides features to help you manage and track addresses for privacy.

### How does ColdKeys help with privacy?

ColdKeys indicates whether an address has been used by changing its color (red for used, green for unused). This encourages users to utilize addresses only once, which is a good practice for Bitcoin privacy.

### What derivation schemes does ColdKeys support?

ColdKeys supports the industry-standard BIP44 and BIP84 derivation schemes, ensuring compatibility with most hardware wallets and other Bitcoin applications.

### Is ColdKeys open source?

Yes, ColdKeys is 100% open source. The code is available for review, even for individuals who are not highly technical, promoting transparency.

### What devices is ColdKeys available on?

ColdKeys is available on iPhone, iPad, and iPod devices, as indicated by its supported devices list.

### How often is ColdKeys updated?

The latest version of ColdKeys was released on May 23, 2019. It was initially released on February 12, 2019.

## Version history (last 5 releases)

### 1.7 — 2019-05-23

-Now add multiple cold storage wallets. Turn on "Watch-Only" in settings and ColdKeys will remember whichever wallet you create or import and it is accessible by tapping the eye button. Swipe the wallet left to give it a label. Tap the wallet to see each address as an invoice. The address will display the balance and turn red if its been used before or green if it has no history.

### 1.6 — 2019-03-22

- Fixes a bug that caused labels to overlap on smaller devices like iPhone SE
- Now supports checking balances for bech32 addresses in the watch only wallet

### 1.5 — 2019-03-21

-Watch only wallet capability added

### 1.4 — 2019-03-20

-Now choose how you want to create your keys from the home screen.
-Go to settings to add bip39 passphrase.
-Updated user interface.

### 1.3 — 2019-03-13

-Now fully compatible with Electrum, Coldcard Wallet, Bitcoin core
-Create brain wallets
-Full native segwit compatibility

## Apps similar to ColdKeys

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| --- | --- | --- | --- |
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| [Auth Armor Authenticator](https://appshunter.io/ios/app/auth-armor-authenticator/id1502837764) | — | Free | Utilities |
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| [Inventory & Storage Manager](https://appshunter.io/ios/app/inventory-and-storage-manager/id1541182235) | 1.0 (1) | Free | Utilities |
| [iColdWallet](https://appshunter.io/ios/app/icoldwallet/id1585595473) | 3.5 (19) | Free | Utilities |

## More apps by Denton LLC

- [Fully Noded](https://appshunter.io/ios/app/fully-noded/id1436425586)
- [X-PUB](https://appshunter.io/ios/app/x-pub/id1453821376)
- [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.*