Apps similar to Umwelt include Handylock, which is free and open source. Other options are BtProx, Bluetooth-Unlock and Guardian Angel. In total there are four apps like Umwelt for Mac, Windows and Linux.
handyLock is an application that locks your Mac screen when you move away from it. This way your Mac is safe and secured from unauthorized access. This is very convenient if you want to prevent access by kids, co-workers or others when you slip away to grab a coffee, a drink or...
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Lock Windows workstation upon disconnection of bluetooth device. The program is able to run user specified commands on device connection and …
Bluetooth-unlock is a python script that checks for your device periodically to check if you are there and if no connection is found, then your Linux Based Computer locks, then when the device is found it automatically unlock (Does not require you entering your...
Guardian Angel watches over your Mac, locking it whenever you leave, and automatically unlocking it when you return.
