Stack Duo by Cypher Stack vs Rikki
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Open source
- Bitcoin and Monero support
- On-device private key storage
- Easy backup and restore
- Custom address book
- Favorite wallets
- Custom Nodes
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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.
Rikki
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For Rikki rings and bracelets, the app allows the secure management of wearables for: - securely connect your card to the ring/bracelet you have chosen - suspend and activate the ring with one click - change the card associated with the ring - be assured that if you lose your phone, no one can access the bank details associated with the ring because the app does not retain any confidential information.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Stack Duo by Cypher Stack | Rikki |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (7 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 129 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Cypher Stack LLC | Sokjo Banking Solutions SL |
In-app purchases
Stack Duo by Cypher Stack
No in-app purchases
Rikki
No in-app purchases
Questions
Is Stack Duo by Cypher Stack free?
Is Rikki free?
Do Stack Duo by Cypher Stack or Rikki have ads?
Which is updated more often, Stack Duo by Cypher Stack or Rikki?
Other comparisons
