Pengtree APP redesign and color change

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This customer received 127 app designs from 21 designers. They chose this app design from bas.hasibuan as the winning design.
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App Design Brief
I am looking for a new design for my app. Please see the attached current design.
Currently, I have a functioning app but the colors and design are awful!
The logo is great but the rest of the app needs a refresh.
(Logo hi res not yet available but will upload soon.)
New colors or anything that is cutting edge.
Basically: It is a secure social media app within a school system where the teachers, students and parents can text, exchange photos, plan curriculum, etc.
I NEED ONLY landing page with a new look!
Looking for one distinct design for the landing page with new look.
The developer will apply this one design towards the rest of the pages/app screens.
Because part of the social media I need the feel and look of what is now the trend. Something that will attract and keep the client(s) interested. I am really leaving all the creative work to the designer and open to any suggestions.
Updates
Project Deadline Extended Reason: Increased payout Added Wednesday, July 12, 2017
Target Market(s)
Schools, community, teachers, students, colleges, sport teams
Industry/Entity Type
Non Profit
Font styles to use
Colors
Designer to choose colors to be used in the design.
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- Sharp, trendy, millennial feel
Nice to have
- Up to designer
Should not have
- Up to designer