Markov Algorithm vs SSP Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Markov Algorithm
This tool emulates a Markov Machine, a string rewriting system used in computer science. It helps students test and debug algorithms with grammar-like rules and a step-by-step execution log.
- Markov Machine emulator
- String rewriting system
- Grammar-like rule application
- Step-by-step debugging
- Execution log
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Students of computer science are probably familiar with Markov algorithm. A string rewriting system that uses grammar-like rules to operate on strings of symbols. This application is a great Markov Machine emulator which can help you test your algorithms and debug it step-by-step using convenient execution log. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SSP Key
This app provides a secure, two-factor authentication method for managing your cryptocurrency wallet. It utilizes a 2-of-2 multi-signature approach, requiring two devices to authorize transactions for enhanced security. Connect to dApps seamlessly with WalletConnect.
- Two-factor authentication for crypto
- 2-of-2 multi-signature security
- Private keys never shared between devices
- Open-source for transparency
- WalletConnect integration for dApps
- Supports multiple blockchain chains
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SSP Key – Secure. Simple. Powerful. Your 2FA for SSP Wallet: the second key in true 2-of-2 multisignature self-custody. SSP Key turns your phone into the second factor of a genuine two-of-two multisig wallet. The SSP Wallet browser extension holds one private key, and SSP Key holds the other. Every transaction must be signed by both devices — so a stolen laptop, a phished password, or a compromised browser is never enough to move your funds. There is no single seed phrase that can be stolen from one device. HOW IT WORKS - A transaction is created and signed in SSP Wallet on your computer. - The request instantly appears on your phone in SSP Key. - You review the details and approve — SSP Key adds the second signature. - Keys are generated on your devices and never leave them. No seed, private key, or extended private key is ever shared between devices. APPROVE WITH CONFIDENCE See exactly what you are signing before you sign it: recipient, amount, fee, and chain, with decoded contract calls for dApp interactions. Approvals are protected by Face ID, Touch ID, or your PIN. OPEN SOURCE AND AUDITED The entire codebase is public — anyone can review, audit, and contribute. SSP Wallet, SSP Key, and the SSP smart contracts have been independently audited by Halborn. SSP Key also integrates LavaMoat runtime protection to defend against supply-chain attacks. MULTI-CHAIN, ONE KEY One SSP Key secures all your chains: Bitcoin (BTC, Native SegWit), Ethereum (ETH), and major EVM networks — Polygon (POL), Base (ETH), BNB Smart Chain (BNB), Avalanche C-Chain (AVAX) — plus Solana (SOL) and Litecoin (LTC), Bitcoin Cash (BCH), Dogecoin (DOGE), Zcash (ZEC), Ravencoin (RVN), and Flux (FLUX), with custom token support on EVM and Solana chains. On Ethereum and EVM chains, SSP is the first wallet with true Schnorr multi-signature Account Abstraction (ERC-4337). WEB3 READY Connect SSP Wallet to thousands of dApps through WalletConnect v2 (Reown). Every dApp transaction and signature still requires approval on your SSP Key — multi-signature security for all of Web3. WORKS OFFLINE TOO Sign transactions entirely offline using QR-code synchronization between your devices — self-custody that works even in restricted or air-gapped environments. GETTING STARTED 1. Install SSP Wallet in your browser (Chrome or Firefox). 2. Install SSP Key (this app) on your phone. 3. Scan the sync QR code — your 2-of-2 wallet is ready in minutes. 4. Approve transactions with a single slide, secured by biometrics. Guides and documentation: docs.sspwallet.io SSP Key is built for people who value security, transparency, and real self-custody — whether you are new to crypto or protecting serious holdings.
Screenshots
Verdict
The clearest difference is in-app purchases: SSP Key at none against Markov Algorithm's 3. SSP Key also leads on update cadence (fortnightly vs every 5 weeks). On price, rating, ratings volume and ads 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. Markov Algorithm sells 3 in-app purchases, starting at $3.99 per month. SSP Key asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Markov Algorithm against 5.0 for SSP Key. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Markov Algorithm ships an update every 5 weeks, SSP Key fortnightly. The most recent releases landed on September 15, 2026 and September 7, 2026 respectively.
| Parameter | Markov Algorithm | SSP Key |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 8 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Konstantin Mishukov | Influx Technologies Limited |
Customer experience
Markov Algorithm
SSP Key
In-app purchases
Markov Algorithm
- Premium: Monthly3 Days trial$3.991 Month
- Premium: Annual$14.991 Year
- Lifetime access$19.99
SSP Key
No in-app purchases









