WujiSeed
Memory-Based Seed Phrases
Free · Designed for iPad. Not verified for macOS.
Generate unforgettable BIP39 seed phrases from your memories. No backup needed - your mind is the key. 100% offline, deterministic, and secure.
WUJI Seed turns human memory into high-entropy BIP39 seed phrases — something previously thought impossible.
THE PROBLEM WITH MEMORY-BASED SECRETS
Human-chosen passwords are notoriously weak. Birthdays, names, and common phrases have extremely low entropy. That's why crypto relies on random generators — but random means forgettable, and forgettable means backups that can be lost or stolen.
HOW WUJI SEED ACHIEVES HIGH ENTROPY
WUJI Seed uses F9Grid, a geographic grid system that divides Earth into billions of precise cells. When you input a coordinate, it maps to a specific cell index with sub-meter precision.
The key insight: when you choose 5 personally meaningful locations that span great distances and are known only to you, the combinatorial space becomes enormous.
Consider:
• Your grandmother's house in a small village
• A hidden beach from a childhood trip
• The exact bench where you had your first kiss
• A remote hiking spot you never told anyone about
• The corner table at a café in a foreign city
These 5 locations, scattered across the globe and unknown to others, create entropy comparable to random number generators — yet they're burned into your memory forever.
HOW IT WORKS
1. Enter your personal identifier
2. Input 5 geographic coordinates (the more spread out and private, the better)
3. Add memory tags for each location
4. Generate your 24-word BIP39 mnemonic
Same inputs, same seed phrase — recoverable from memory alone.
MAXIMIZING YOUR ENTROPY
For strongest security:
Choose locations spanning different cities, countries, or continents
Pick precise spots, not general areas (the specific tree, not "the park")
Select places only you would know or remember
Avoid famous landmarks or locations shared on social media
The wider your geographic spread + the more private your locations = the higher your entropy.
KEY FEATURES
Geographic Entropy
F9Grid extracts maximum randomness from your location choices. Wide-spread, private locations yield security rivaling hardware random generators.
100% Offline
All operations local. No internet. No data leaves your device.
No Backup Required
Your brain is the backup. Remember 5 locations, regenerate anywhere.
Deterministic
Same inputs always produce the same result. Test it yourself.
Bank-Grade Cryptography
Argon2id key derivation, BLAKE2b-256 hashing, XChaCha20-Poly1305 encryption.
BIP39 Compatible
Works with Ledger, Trezor, MetaMask, Trust Wallet, and all standard wallets.
Privacy First
No accounts. No cloud. No tracking.
WUJI Seed — For the Memories That Never Fade
Ratings & Reviews
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The developer, 瑜珊 林, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- 瑜珊 林
- Size
- 24.4 MB
- Category
- Finance
- Compatibility
Requires iOS 12.0 or later.
- iPhone
Requires iOS 12.0 or later. - iPad
Requires iPadOS 12.0 or later. - iPod touch
Requires iOS 12.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, Japanese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 WujiKey. All rights reserved.