Credit card super app – track credits, find lounges, add offers (iOS)
Manual credit tracking app competing against MaxRewards and CardPointers.

Tidy, privacy-first vault that keeps everything on-device and uses Argon2id + AES-256 with per-field encryption — not just marketing buzz: the copy lists concrete choices like 64 MB memory hardness and biometric key storage in the secure enclave. Features such as camera card scanning, per-vault isolation, and on-demand file decryption are useful for single-device users, but the offline-only stance also limits appeal compared with cross-device managers like 1Password or Bitwarden.
Privacy-conscious iOS users and individuals who want an offline-only password/card/document vault
Manual credit tracking app competing against MaxRewards and CardPointers.
Encrypts files one-by-one from a single runnable JAR, which is nice for cross-platform use and managing many small vaults without re-archiving. The README clearly explains usage, but there’s no visible discussion of algorithms, key management, integrity guarantees, or threat model — that omission keeps this from standing out in a space already served by mature tools like age/gocryptfs.
Your own S3 bucket with client-side encryption beats yet another cloud vault.
Runtime injection bypasses .env files entirely—secrets never touch disk.
Solves $120B Bitcoin inheritance problem with USB-only, one-time payment model.
Email for AI agents: end-to-end encrypted messaging with pluggable relays.