Mouthshut is very famous for review.it is very old site that now available in app.it is very good app.i am using it since 6 months.
Concept: - mouthshut app concept is very easy that there are so lakhs of product and you can write a review about product and you will earn money only by writing and share.
Layout and design: - its design is awesome its layout have green color that looks good and it looks intresting and we not bored because there are too many option.
Function and features: - there is only one feature in this app that is write a review about the product and you will earn money.
Usefullness: - it is very usefull app beacuse it is real app and gives real money in your bank account.
Guys you should try this app because it is amazing.