Comparison

Theya 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
About

Theya

This app offers a secure, self-custody solution for managing Bitcoin. It utilizes multi-sig technology and supports hardware wallets for enhanced control and protection of your assets.

Highlights
  • Self-custody Bitcoin management
  • Multi-signature technology
  • Hardware wallet integration
  • Seedless setup and backups
  • Collaborative vault security
  • Seamless recovery process
Read full description

Discover Theya: The Simplest Self-Custody Wallet for Securing Your Bitcoin With Theya's cutting-edge multi-sig technology, you're shielded from the pitfalls of single key vulnerabilities and custodial failures, ensuring unparalleled control and self-sovereignty over your assets. Why Theya? Effortless Experience: Seedless setup, hassle-free backups, and straightforward transactions. Theya combines premium UX with unmatched safety. Unmatched Security: Our vault is your fortress against key loss, custodial errors, and theft. With minimized counterparty risks, your Bitcoin remains untouchable. Cold Storage Vaults: Create hardware-only vaults with your favorite hardware wallets. We support Trezor, Coldcard, Ledger, and Foundation wallets, with more coming soon! Collaborative Vaults: Build a security network by designating a trusted contact as your cosigner. Cosigners can add their preferred hardware wallets or a mobile key, ensuring everyone involved enjoys the same high level of security. Seamless Recovery: Lost a key? No problem. Theya's recovery process ensures you can always reclaim access to your wallet. Secure your Bitcoin future with self-sovereignty and without compromise. Download Theya and step into the forefront of self-custody security for your Bitcoin. ---- If you choose to purchase Theya Essentials, payment will be charged to your Apple account, and your account will be charged for renewal within 24 hours prior to the end of the current period. Auto-renewal may be turned off at any time by going to your settings in the App Store after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://www.theya.us/legal/privacy Terms of Service: https://www.theya.us/legal/terms

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

Theya4 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 Theya's 1. Stack Duo by Cypher Stack also leads on device support (3 vs 1). Theya's advantage is rating (4.7 vs 4.3) and update cadence (every 6 days vs every 5 weeks). On price, ads and iOS requirement 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. Theya sells 1 in-app purchase, starting at $250.00 per year. Stack Duo by Cypher Stack asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Theya holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 34 and 7 respectively. Written reviews point the same way: 77% of Theya's written reviews are positive against 67% of Stack Duo by Cypher Stack's.

UpkeepUpdate frequency

Theya ships an update every 6 days, Stack Duo by Cypher Stack every 5 weeks. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

Scorecard7 real differences · 3 level
Theya versus Stack Duo by Cypher Stack: the parameters behind the verdict, then further details
ParameterTheyaStack Duo by Cypher Stack
PriceFreeFree
Rating4.7 (34 ratings) — better4.3 (7 ratings)
Positive reviews76.9% of reviews — better66.7% of reviews
Number of ratings34 — better7
Update frequencyEvery 6 days — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size82 MB129 MB
Age rating17+4+
DeveloperTheya Inc.Cypher Stack LLC

Customer experience

Theya

All ratings34 ratings
Positive91.2%
Neutral0.0%
Negative8.8%
Written reviews13 reviews
Positive76.9%
Neutral7.7%
Negative15.4%

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

1 purchases

Theya

Subscriptions1
  • Essential14 Days trial$250.001 Year
None

Stack Duo by Cypher Stack

No in-app purchases

Questions

Is Theya free?
Theya 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, Theya or Stack Duo by Cypher Stack?
Theya is rated higher. Theya averages 4.7 out of 5 from 34 ratings, while Stack Duo by Cypher Stack averages 4.3 from 7 ratings.
Do Theya or Stack Duo by Cypher Stack have ads?
Neither Theya nor Stack Duo by Cypher Stack shows ads.
Which is updated more often, Theya or Stack Duo by Cypher Stack?
Theya ships an update every 6 days, and Stack Duo by Cypher Stack every 5 weeks. Most recently, Theya was updated on September 30, 2026 and Stack Duo by Cypher Stack on October 7, 2026.

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