Secure - Offline Password Manager

>> **Secure** is a password manager designed to keep your secrets as safe as possible, isolated from the outer world.
To achieve this goal, it:
- works 100% offline; not a single bit of data is transmitted over Internet
- stores data only in encrypted form
- locks automatically when not in use
- hides preview in recent apps screen
- analyzes password strength and suggests strong passwords
The user interface is streamlined, polished, carefully tweaked for natural usage and ad-free.
# Isolation
To minimize exposure, the only way **Secure** goes out of its box is by writing and reading backup files to and from your Device's _Downloads_ folder.
>> **Secure** never goes online.
This can easily be verified by checking the _App info/Data usage_ section, which will always display 'No data used'.
In the same spirit, the app is configured to be excluded from the Applications Backup your Google account might have enabled, to avoid getting its data uploaded in Google's cloud.
# Encryption
>> All data written by **Secure** to your device is encrypted, including backup files.
# App Locking
All security measures would be pointless if somebody could just pick up your phone and open the app.
**Secure** will lock automatically when it loses focus (like, for example, when you switch to another app, press the Home button or switch off the screen). Locking may take place immediately or after a little while, depending on your preferences.
>> There's no need to use a third-party app to protect **Secure**.
**Secure** uses PIN authentication, which offers good security. It also gives the option to unlock with fingerprint, a slightly less secure but considerably more convenient method.
Lock settings can be customized using the _Security_ menu.
# Backup/Restore
You can create a backup of your passwords using the _Backup_ menu. The backup file can be used to restore your passwords, so make sure to copy/move it to a safe place on a different device, to have it available in case your phone gets lost, stolen or becomes unusable.
>> The backup file, named **secure..backup**, is placed in the _Downloads_ folder.
The backup file is encrypted. It can be restored only if you know the secret used when it was created.
To backup/restore data, the app must access the _external storage_ (the _Downloads_ folder). You will be asked to grant this permission during the first use of one of these functions.
If you uninstall the app or clear app's data, the permission is cleared. You will need to grant it again in order to be able to use backups.
# Sharing
It is of critical importance to have a copy of your data in some other place than your phone. **Secure** gives you the option to "share" the database, which means creating a database copy and handing it to another app (of your choice) able to perform file transfers.
For example, sharing with the Dropbox app would allow this app to upload a database copy into your Dropbox account.
You are always in control, being the one initiating the sharing process, selecting the app to perform the transfer and the destination.
# Clearing App Data
If, for some reason, you decide to clear **Secure**'s app data, keep in mind this will delete its database.
>> Make sure you create a backup first.
# Password Recommendations
**Secure** does an offline analysis of your passwords to determine their strength.
Passwords receive a score from 0 (red, weakest) to 4 (green, strongest) and display this info as colored bullets in the accounts list screen or textually in the account detail screen.
An estimated time needed to crack the password is also calculated.
Scores and crack time are nice and fun but keep in mind this info is only a very rough estimation, not rigourous science.
The algorithm used is [zxcvbn](https://github.com/dropbox/zxcvbn), developed and used by Dropbox.
>> **Secure** provides a password generator option in the account detail screen, which generates only score 4 passwords.