RFM A-Note: free and sure (you will never lost a note) Notepad text editor for your Android device. No ads. No banners.. REALLY FREE

AirCover Security protects your Android devices from viruses, malware and other threats, with anti-virus, real-time protection, web protection, anti-surveillance, and other security features.

Lock My Files is an App that lets you to Lock any of your files.
You can Lock any of your Personal Photos,Videos,Files using this App.
It Safely encrypts your files with your Password So that nobody other than you can open it!.
It also has an integrated File Explorer with this!!

A simple application that will help you remember the Wi-Fi passwords stored on your device.

Image Locker is the easiest and safest way to protect your important images.

Notes is an Efficient and useful tool which helps you Note down anything you want to.
Notes have a “Text file Builder” which helps you to make Text files of your notes , you want to include.
Notes is Password protected so that you don’t have to worry about Security.
Simple User Interface and easy to use.

Randomly Generate and store passwords
Store user Created Passwords
Export passwords

VIPole messenger strongly encrypts instant text messages, group chats, voice calls, video calls and files so that no third-party (even we as service provider) is able to listen to conversations or tap into a message or file. VIPole is a secure messaging app powered by strong encryption technologies that perfectly guard your privacy, sensitive private communications and files from prying eyes and surveillance efforts.

It's invisible, it's fast and it forwards all incoming text messages from your child's mobile to yours along with name and number.

Hide messages and file attachments in images. Hidden messages can be secured with a password and shared by email or social media.

Still looking for a secret diary app with an easy UI? Get frustrated by using complex diaries daily?
HERE YOU GO! Handy Diary is your best choice!
- Handy Diary is a simple diary app with a User Friendly UI which is easy to use
- Handy Diary is a secure diary with a password lock, data backup to SD card or on the Cloud
Use this app to record every moment of your life! All your experiences, ideas, opinions and thoughts can be organized and managed in this single app.

List all devices in your WiFi network and get notifications about new devices

Mobile Security and Antivirus makes sure your phone is secure and your privacy protected. The application, which taps Bitdefender’s decade of award winning experience fighting electronic threats, offers a robust defense against invasion of privacy, viruses and theft while saving battery power for its core purpose – communication.

Just input the password, turn the wheel to the "unlock", and the unlock done!
You can set the password to unlock inside the app.

Do you forget where did u you spend your money or to whom did you lent or from whom did u borrow???? Then,this app is for you...Download it & live TENSION FREE :) :)...

SMSSEAL safeguards your privacy by password protecting SMS messages and contacts

Essential app for all android users. Password protect your phone's personal data

An essential app for every android user. Password protect any personal data on your phone.
AppLock lets you protect any applications you want with a passcode: SMS, Email, Pictures, Calendar...any apps you choose

Beacon, a free and ad-free, light weight, energy efficient, stripped down version of a security App which would greatly aid you in finding your Android incase its lost. The App uses SMS as its primary means of communication as it’s more reliable than 3G/GPRS/EDGE etc.

ChatS - Chat with your friends securely and secretly by self-encrypted communication.
Easy to use messenger tool that use encryption/decryption techniques to only send coded messages free via the web.
You chose the encryption key, stored encrypted on your device using a Password potentially stored nowhere, and that only you know.
Send the messages encoded, and decoded by a PasCode only you and your friend, the recipient, knows.

SecretSMS is designed to provide secure text messaging. It encrypts regular text into cipher-text that can not be visible without proper password.