Comparison

Bitcoin Keeper vs Stack Duo by Cypher Stack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Bitcoin Keeper

Community Run Open BTC Wallet

Free

💰 Finance

★ 4.522 ratingsView app →

Stack Duo by Cypher Stack

Free

💰 Finance

★ 4.37 ratingsView app →

About

Bitcoin Keeper

A community-run, open-source Bitcoin wallet emphasizing secure self-custody. This application does not offer financial or investment advice, focusing solely on managing your cryptocurrency.

Highlights

Open-source Bitcoin wallet
Secure self-custody
Community-run
No financial advice provided

Read full description

Keeper is a community-led, open-source bitcoin wallet focused on secure self-custody. Keeper does not provide financial or investment advice. For latest updates, join us on Twitter: https://twitter.com/bitcoinkeeper_ Join our Telegram channel for support queries: https://t.me/bitcoinkeeper Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stack Duo by Cypher Stack

A user-friendly, open-source cryptocurrency wallet supporting Bitcoin and Monero. It prioritizes security by keeping private keys on your device and offers features like a custom address book and favorite wallets for efficient management.

Highlights

Open source
Bitcoin and Monero support
On-device private key storage
Easy backup and restore
Custom address book
Favorite wallets
Custom Nodes

Features

Read full description

Stack Duo is a fully open source cryptocurrency wallet. It's a stripped down version of Stack Wallet that only has Bitcoin and Monero. With an easy to use user interface and quick and speedy transactions, this wallet is ideal for anyone no matter how much they know about the cryptocurrency space. The app is actively maintained to provide new user friendly features. Highlights include: Bitcoin and Monero included All private keys and seeds stay on device and are never shared. Easy backup and restore feature to save all the information that's important to you. Custom address book Favorite wallets with fast syncing Custom Nodes. Open source software.

Screenshots

Bitcoin Keeper4 screens

Stack Duo by Cypher Stack4 screens

Verdict

The call

The clearest difference is in-app purchases: Stack Duo by Cypher Stack at none against Bitcoin Keeper's 8. Bitcoin Keeper's advantage is rating (4.5 vs 4.3) and update cadence (every 2 weeks vs every 5 weeks). On price, review sentiment, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bitcoin Keeper sells 8 in-app purchases, starting at $6.99 per month. Stack Duo by Cypher Stack asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Bitcoin Keeper holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 22 and 7 respectively. Written reviews point the same way: 73% of Bitcoin Keeper's written reviews are positive against 67% of Stack Duo by Cypher Stack's.

UpkeepUpdate frequency

Bitcoin Keeper ships an update every 2 weeks, Stack Duo by Cypher Stack every 5 weeks. The most recent releases landed on September 30, 2026 and September 20, 2026 respectively.

Scorecard5 real differences · 5 level

Bitcoin Keeper versus Stack Duo by Cypher Stack: the parameters behind the verdict, then further details
Parameter	Bitcoin Keeper	Stack Duo by Cypher Stack
Price	Free	Free
Rating	4.5 (22 ratings) — better	4.3 (7 ratings)
Positive reviews	73.3% of reviews — better	66.7% of reviews
Number of ratings	22 — better	7
Update frequency	Every 2 weeks — better	Every 5 weeks
Ads	No	No
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	Free — better
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	15.1	15.0 — better
Further details — not scored
Size	66 MB	129 MB
Age rating	17+	4+
Developer	Bithyve	Cypher Stack LLC

Customer experience

Bitcoin Keeper

All ratings22 ratings

Positive86.4%

Neutral0.0%

Negative13.6%

Written reviews15 reviews

Positive73.3%

Neutral0.0%

Negative26.7%

Stack Duo by Cypher Stack

All ratings7 ratings

Positive85.7%

Neutral0.0%

Negative14.3%

Written reviews3 reviews

Positive66.7%

Neutral0.0%

Negative33.3%

In-app purchases

8 purchases

Bitcoin Keeper

Subscriptions8

Hodler Monthly3 Months trial$6.991 Month
Hodler1 Month trial$9.991 Month
Diamond Hands Monthly1 Month trial$24.991 Month

Show 5 more

Diamond Hands Monthly3 Months trial$27.991 Month
Hodler Yearly3 Months trial$69.991 Year
Hodler Yearly1 Month trial$99.991 Year
Diamond Hands Yearly1 Month trial$199.991 Year
Diamond Hands Yearly$279.001 Year

None

Stack Duo by Cypher Stack

No in-app purchases

Questions

Is Bitcoin Keeper free?

Bitcoin Keeper is free to download, with in-app purchases available.

Is Stack Duo by Cypher Stack free?

Stack Duo by Cypher Stack is free to download, with no in-app purchases.

Which has better reviews, Bitcoin Keeper or Stack Duo by Cypher Stack?

Bitcoin Keeper is rated higher. Bitcoin Keeper averages 4.5 out of 5 from 22 ratings, while Stack Duo by Cypher Stack averages 4.3 from 7 ratings.

Do Bitcoin Keeper or Stack Duo by Cypher Stack have ads?

Neither Bitcoin Keeper nor Stack Duo by Cypher Stack shows ads.

Which is updated more often, Bitcoin Keeper or Stack Duo by Cypher Stack?

Bitcoin Keeper ships an update every 2 weeks, and Stack Duo by Cypher Stack every 5 weeks. Most recently, Bitcoin Keeper was updated on September 30, 2026 and Stack Duo by Cypher Stack on September 20, 2026.