How do we create a "Call waiting" option for a VOIP mobile app using Twilio even though Twilio does not have an SDK that supports this function?

You are right that the range is wide. You need to figure what are good values to have for your category. Also, you can focus on the trend (is your DAU/MAU increasing vs decreasing after you make changes) even if benchmarking is tough. Unless your app is adding a huge number of users every day (which can skew DAU/MAU), you can trust the ratio as a good indication of how engaged your users are. For games, DAU/MAU of ~20-30% is considered to be pretty good. For social apps, like a messenger app, a successful one would have a DAU/MAU closer to 50%. In general most apps struggle to get to DAU/MAU of 20% or more. Make sure you have the right definition of who is an active user for your app, and get a good sense of what % of users are actually using your app every day. Happy to discuss what is a good benchmark for your specific app depending on what it does.

I developed and published mobile apps as an individual for several years, and only formed a corporation later as things grew and it made sense. As far as Apple's App Store and Google Play are concerned, you can register as an individual developer without having a corporation. I'd be happy to help further over a call if you have any additional questions. Best of luck with your mobile app!

My 2 favourite are: - www.uxpin.com - www.flinto.com Flinto is by far my favorite for mobile. I also us www.balsamiq.com for anything wireframe. Sometimes I jump into Sketch http://www.bohemiancoding.com/sketch/ for more high fidelity mockups using their Mirror feature http://www.bohemiancoding.com/sketch/mirror/ Hope that helps. P.S. There's a tonne of Mobile UX experts on Clarity, many $1/min - call them, you'll learn so much. my2cents.

To answer your questions: 1) Mobile companies at your stage usually raise angel funding at a valuation equivalent of $5,000,000 for US based companies and $4,000,000 to $4,500,000 for Canadian companies. 2) The valuation is a function of how much you raise against that valuation. For instance, selling $50,000 at $5,000,000 means you are selling debt that will convert into shares equal to roughly 1% of your company. 3) I would encourage you to check out my other answers that I've recently written that talk in detail about what to raise and when to raise. Given that you've now launched and your launch is "quiet", most seed investors are going to want to see substantial traction before investing. It's best for you to raise this money on a convertible note instead of actually selling equity, especially if you are intending on raising $50,000 - $100,000. Happy to schedule a call with you to provide more specifics and encourage you to read through the answers I've provided re fundraising advice to early-stage companies as well.

Apps are difficult to fund on IndieGoGo as few are successful, and we rarely take them on as clients. Websites like http://appsfunder.com/ are made for that very reason, but again, difficult to build enough of a following willing to pay top dollar for an app that could very well be free, already existing in the marketplace. A site that is gaining more traction you may want to look into would be http://appsplit.com/. Again, Appsplit Is Crowdfunding For Apps specifically.