How to protect your privacy from big data collection robot

How to protect your privacy from big data collection robot
Down Urls:
Google play url: https://play.google.com/store/apps/details?id=com.tech.secretsharetextlite
App download backup 1: https://drive.google.com/file/d/1Sj3MXRRUkxM1GT4JeoFX4rCRW6xhMPdj/view?usp=sharing
App download backup 2: https://mega.nz/#!yPYiHAxQ!BhJatp2Sf-GDaYevqx3Vx6tIK0o4MN4Oq8FpUb5oEe8
Intro:
This app can protect user's privary from some data collection robot.
Encrypt text, and convert encrypted text to QR Code, other people only can use this app 'decrypt' feature to decrypt the encrypted qr code, data collection 'regular'(attention it's regular) robot cannot collect user content and know what user think
But if data collection robot can control this app to decrypt, it's rare case, then this app cannot protect your privacy