Knockr-->Gesture defined lockscreen operation

Anciently persistent and recently hyped technique of software-user interaction in electronic devices , the gestures, have been around since the stone age for mutual interaction and communication.



Gestures are one of the most recently caught upon technique in the user interaction as a substitution for a button press on smart phones .As Android has evovled,the addition of gesture based operations has been consequently increasing may it be in the google authorized apps or the whole UI based interaction.

The "Double Tap to Wake" feature introduced in windows phone OS ,then adopted by LG,has become a general  commonly used operation in functionality adopted by OEMs to unlock the device without the need to push your power button.

This functionality has been limited to only the highend devices out ther such as the LG G2 and the LEGENDARY HTC ONE . One of the reasons is the function has to be embedded in the kernel (quite a difficult thing to do).

For other devices ,the low end ones, have an app for that,known as "knockr"  by Angs apps .It allows the users to calibrate and select the gesture to be used for a specific purpose such as "double tap" ,"swipe up",etc. and these gestures can be calibrated to open apps,get to lockscreen or even unlock the device.

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With the updated version, there is an addition of drawable gesture functionality  wherein one can draw the design and get desired operation.

Its UI is really well -defined,minmalistic and rather simple for any user may it be a beginner Or a pro to use it effectively.

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Pros:

• allows various gesture definitions for multiple operations.


• easy and minimalistic user interface.


• brings a feature of High end devices to the low end ones.

Cons:

• Eats up the battery a bit.


• Sometimes fails to recognise (due to low RAM  on some devices).

On the Whole , one can use this app for adding some fancy functionality to the low or mid range or older high end devices.

Source : xda-developers.com