When comparing NS Wallet Offline Password manager vs KeeWeb, the Slant community recommends KeeWeb for most people. In the question“What are the best offline password managers?” KeeWeb is ranked 7th while NS Wallet Offline Password manager is ranked 34th. The most important reason people chose KeeWeb is:
KeePass 2.x *.kdbx password-databases (provided they are encrypted by AES-256 with AES key-derivation) are compatible with KeeWeb.
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Pros
Pro Flexibility
It is possible to create custom fields and types of data
Pro Integrated password generator
Generate strong password based on preferences or us clever password generation based on previous password
Pro Backup system
Embedded backup system, possibility to rollback
Pro Offline storage
The data is only on the phone
Pro All primary functionality is free
Pro Its password databases are compatible with those of KeePass 2.x
KeePass 2.x *.kdbx password-databases (provided they are encrypted by AES-256 with AES key-derivation) are compatible with KeeWeb.
Pro Available as an online or offline app
There are Windows, Linux and Mac OSX offline apps.
Pro Supports WebDAV, Google Drive and OneDrive
Pro Syncs with Dropbox
Pro Supports 2FA
And it's Google Authentication compatible.
Cons
Con No desktop version
There is no desktop version yet, only Android and iOS are supported