One page (html/css/images) for website

Need to build a landing page (home page) for a website, the website is all build except the landing page, the page already have a header and a footer, just need the contents. Website description: Website address is [login to view URL] it is similar in its function to [login to view URL] which is whatsapp contact monitoring app for children, basically logs the online time for whatsapp users and alerts their parents whenever they go online/offline. Can also be used for schools who dont allow their students to use whatsapp (but allow phones) or for people who miss the old messengers where there were notifications "BLA is now online" ... like skype forexample whenever one f ur friends go online. Requirements: 1 - Create a webpage that fits between the already-existing header and footer (no matter the height) 2 - Content should be simple for users to read and to be attractive 3 - Content should make the user understand what this website/app is for in less than 3 seconds - Ferrari speed ;) - 4 - The website already uses bootstrap, but custom CSS and/or JS is accepted as long as it is not minified/obfuscated. 5 - the design should convert visitors into actual users. 6 - Mobile friendly is a must as 90% of the visitors will be from mobile devices When will i review your application: - I will review and reply ONLY to people who actually read the description and show me that they understoo what is required and ask me questions. - No "We are (whatever) company ...." all general messages will be ignored. - Show me at least 3 landing pages you've built, Steps: - You will ask me about the project if there's something you did not understand / show me you know what i am talking about because I stopped using this website years ago because people seemed not to understand what they are required to do. - Once I am satisfied that you actually read the requirements, I will ask you for previous work ( would be great if you post it when bidding/asking) - I will ask you to give me a simple idea on how will you proceed to make any visitor convert - If i'm convinced, you're good to go. If i like your work, We will add a link to your freelancer page in the "about us" page (which among other pages we will hire you to do). Good luck!