# Theya vs Stack Duo by Cypher Stack

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.

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.

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.

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.

## The numbers

| Metric | Theya | Stack Duo by Cypher Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (34 ratings)](https://appshunter.io/ios/app/theya-bitcoin-wallet/id1669665032/reviews)** | [4.3 (7 ratings)](https://appshunter.io/ios/app/stack-duo-by-cypher-stack/id6446602017/reviews) |
| Number of ratings | **34** | 7 |
| Positive reviews | **76.9% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | Freemium | **Free** |
| Size | 82 MB | 129 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Theya Inc.](https://appshunter.io/developer/1669665034) | [Cypher Stack LLC](https://appshunter.io/developer/1613267900) |

## What reviewers say

### Theya

[App page](https://appshunter.io/ios/app/theya-bitcoin-wallet/id1669665032)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Essential | $250.00 | per year |


### Stack Duo by Cypher Stack

[App page](https://appshunter.io/ios/app/stack-duo-by-cypher-stack/id6446602017)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*