# Stack Duo by Cypher Stack vs Rikki

The clearest difference is device support: Stack Duo by Cypher Stack at 3 against Rikki's 1. Stack Duo by Cypher Stack also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on June 5, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Stack Duo by Cypher Stack | Rikki |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/stack-duo-by-cypher-stack/id6446602017/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free | — |
| Size | 129 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cypher Stack LLC](https://appshunter.io/developer/1613267900) | [Sokjo Banking Solutions SL](https://appshunter.io/developer/1750299977) |

## What reviewers say

### 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


### Rikki

[App page](https://appshunter.io/ios/app/rikki/id6503911737)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stack Duo by Cypher Stack free?

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

### Is Rikki free?

Rikki is free to download, with no in-app purchases.

### Do Stack Duo by Cypher Stack or Rikki have ads?

Neither Stack Duo by Cypher Stack nor Rikki shows ads.

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

Stack Duo by Cypher Stack ships an update every 5 weeks, and Rikki every 5 weeks. Most recently, Stack Duo by Cypher Stack was updated on June 5, 2026 and Rikki on September 21, 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.*