# Stack Duo by Cypher Stack vs ERTC

The clearest difference is device support: Stack Duo by Cypher Stack at 3 against ERTC's —. ERTC's advantage is iOS requirement (13.0 vs 15.0). On price 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.

## The numbers

| Metric | Stack Duo by Cypher Stack | ERTC |
| --- | --- | --- |
| 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 | — |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | — |
| Size | 129 MB | 12 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Cypher Stack LLC](https://appshunter.io/developer/1613267900) | [ERTC Platform LLC](https://appshunter.io/developer/1695068719) |

## 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


### ERTC

[App page](https://appshunter.io/ios/app/ertc-mobile-node-wallet/id6450823975)

**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 ERTC free?

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

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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.*