I have another niche product that I'd appreciate some feedback on.
RocketSMS (https://www.rocketsms.co/) gives users in countries without a SMS API or where it's very expensive (such as Jamaica) the ability to do local text message marketing. Text message are sent from and received on the phone running the app so all charges are local. If your mobile provider offers unlimited text messaging (such as Flow) this is a good option.
If you are part of any of the target groups (radio stations, ad agencies, schools, churches), I'd appreciate some feedback and will setup a free account for you to test for 3 months. Also appreciate any feedback on design and business model.
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Respect