Kryptomate vs SeedArk Mnemonic Vault

Kryptomate is an app to help you en- or decode small text snippets through either Caesar or Vigenère cipher. Be it for a puzzle (e.g. for a Geocache) or for fun with your friends. The caesar cipher is probably the simplest and most well-known cipher out there. It works by shifting each letter of the given phrase forward in the alphabet by a given number. It is named after Julius Caesar, who was known for encrypting sensitive military information with a shift of three. The caesar cipher is often used to teach the basics of cryptography, as it's purpose and function is easily understood. The vigenère cipher works using the same principle, but is significantly younger and it took quite a while for the first person to break it. It uses a key instead of a single shift to determine a different shift for each letter of the given phrase. Doing so makes it a lot harder for a single person to try and break it by guessing the shift. The ciphers used in Kryptomate are in no way something you should use to keep actual data safe. Even the newer of the two methods is over 450 years old. The caesar and vigenère ciphers are both very simple concepts and often used in puzzles. Both are not secure for modern purposes. Please note that Kryptomate will only work with alphabetical characters (A-Z, a-z). Punctuation, numbers and other special characters will stay the same. The source for this application is available on Github. See https://github.com/kiliankoe/kryptomate-ios

SeedArk is a fully offline BIP-39 mnemonic vault for storing recovery words from hardware wallets, cold wallets, and self-custody setups. It is not a wallet. SeedArk does not derive addresses, connect to blockchain RPC endpoints, send transactions, or provide buying, selling, swapping, lending, staking, or any financial operation. It does one job: store your mnemonics and optional passphrases as encrypted local records, so you can look them up when you need them. Core features • Fully offline by design: no account, no cloud sync, no remote server • Supports 12 / 15 / 18 / 21 / 24-word BIP-39 English mnemonics • Generate new mnemonics on device or enter existing ones manually • Validate BIP-39 wordlist membership and checksum during entry • Store optional passphrases with UTF-8 hex display for byte-level checking • Organize multiple records with names, chain tags, and notes • Search names, tags, and notes while excluding sensitive seed data • Unlock with an app password and optional Face ID fast path • Auto-lock after backgrounding or inactivity • Disable copy and share menus on sensitive views • Add defenses for third-party keyboards, dictation, screenshots, screen recording, and app switching • Export the full vault as an encrypted .wwbk file for migration or secondary backup Security model SeedArk encrypts the local vault with AES-GCM through Apple CryptoKit and derives password keys with Argon2id through swift-sodium / libsodium. Keychain items are limited to this device and never synchronize through iCloud Keychain. Data files use complete file protection and are excluded from system backups. SeedArk is not meant to replace your paper or steel backup. Your handwritten offline copy should remain the ultimate source of truth. SeedArk is a second layer for daily lookup, organization, migration backup, and local encrypted safekeeping. If you need a connected wallet, market data, trading, address derivation, or on-chain interaction, SeedArk is not that tool. If you need a restrained offline vault dedicated to mnemonic storage, that is exactly what it is built for.