Cryptee - Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos and all sorts of other files.

ClevNote - ClevNote is an amazing mobile application that helps you to write the daily memos on your smartphone.

SocialVault - Decentralized, encrypted storage and browser for your Facebook data.

Notes with pictures - Notes with pictures is one of the best mobile apps that enable you to write notes and add images, voices, videos, and attach documents to your records.

Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.

Notepad by Splend Apps - Notepad by Splend Apps is one of the best mobile apps that enables you to create a to-do list and notes.