Viable Fit - Measure and improve your product market fit
Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
Product Fit - Measure product/market fit in app with your users.
Sayat - Sayat app is all about getting anonymous and honest feedback.
Product Market Fit Toolkit - Measure your product-market fit using data you already have
Sarahah - Sarahah is a Social Networking Application for providing anonymous feedback launched in 2016 and available to use on iOS and Android platforms.