# Envoy by Foundation vs Stack Duo by Cypher Stack

The clearest difference is rating: Envoy by Foundation at 4.6 against Stack Duo by Cypher Stack's 4.3. Envoy by Foundation also leads on update cadence (every 8 days vs every 5 weeks) and review sentiment (81% vs 67%). Stack Duo by Cypher Stack's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Envoy by Foundation holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 30 and 7 respectively. Written reviews point the same way: 81% of Envoy by Foundation's written reviews are positive against 67% of Stack Duo by Cypher Stack's.

Envoy by Foundation ships an update every 8 days, Stack Duo by Cypher Stack every 5 weeks. The most recent releases landed on September 23, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Envoy by Foundation | Stack Duo by Cypher Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (30 ratings)](https://appshunter.io/ios/app/envoy-by-foundation/id1584811818/reviews)** | [4.3 (7 ratings)](https://appshunter.io/ios/app/stack-duo-by-cypher-stack/id6446602017/reviews) |
| Number of ratings | **30** | 7 |
| Positive reviews | **81.3% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 150 MB | 129 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Foundation Devices, Inc.](https://appshunter.io/developer/1584811820) | [Cypher Stack LLC](https://appshunter.io/developer/1613267900) |

## What reviewers say

### Envoy by Foundation

[App page](https://appshunter.io/ios/app/envoy-by-foundation/id1584811818)

A user-friendly Bitcoin wallet designed for simplicity and robust account management. It offers automatic encrypted backups, allows management of both mobile and hardware wallets, and facilitates seamless Bitcoin purchases and transactions. Enhanced privacy features include optional Tor connectivity and the ability to connect to a personal Bitcoin node.

**Highlights:** Self-custody Bitcoin wallet, Magic Backups (automatic encrypted backups), Manage mobile and hardware wallets, Seamless Bitcoin purchases, Zen-like transaction interface, Optional Tor connectivity, Connect to own Bitcoin node

**Features:** Vision Pro support

**In-app purchases:** none


### 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 Envoy by Foundation free?

Envoy by Foundation is free to download, with no in-app purchases.

### 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, Envoy by Foundation or Stack Duo by Cypher Stack?

Envoy by Foundation is rated higher. Envoy by Foundation averages 4.6 out of 5 from 30 ratings, while Stack Duo by Cypher Stack averages 4.3 from 7 ratings.

### Do Envoy by Foundation or Stack Duo by Cypher Stack have ads?

Neither Envoy by Foundation nor Stack Duo by Cypher Stack shows ads.

### Which is updated more often, Envoy by Foundation or Stack Duo by Cypher Stack?

Envoy by Foundation ships an update every 8 days, and Stack Duo by Cypher Stack every 5 weeks. Most recently, Envoy by Foundation was updated on September 23, 2026 and Stack Duo by Cypher Stack on June 5, 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.*