Letras is an Android app developed by Studio Sol (R. Paraíba, 550 - 22º andar Belo Horizonte, MG - Brasil).

Letras first became available on 13 Jun 2014. It is estimated that Letras has been downloaded between 10000000 and 50000000 times from the Play Store.

Letras 1.27 requires the following permissions:

Allows an app to access precise location. Alternatively, you might want ACCESS_COARSE_LOCATION.

Allows applications to access information about networks.

Allows applications to access information about Wi-Fi networks.

Allows an application to modify the current configuration, such as locale.

Allows applications to change Wi-Fi connectivity state.

Allows applications to open network sockets.

Allows an application to modify global audio settings.

Allows an application to read from external storage.

Allows an application to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting. If you don't request this permission, you will not receive the broadcast at that time. Though holding this permission does not have any security implications, it can have a negative impact on the user experience by increasing the amount of time it takes the system to start and allowing applications to have themselves running without the user being aware of them. As such, you must explicitly declare your use of this facility to make that visible to the user.

Allows an application to record audio.

Allows an app to create windows using the type TYPE_SYSTEM_ALERT, shown on top of all other apps. Very few apps should use this permission; these windows are intended for system-level interaction with the user.

Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.

Allows an application to write to external storage.

Allows an application to read or write the system settings.