Where are you located?

Finding investors is all about networking and relationship building.

I'd be happy to help point you in the right direction.

This is a common question that I've seen and answered before. You are not alone!

A simple way to validate any startup idea is to put together a landing page and drive some traffic to it. Unbounce is a great tool for building landing pages.

Spend a few hundred dollars on Google Adwords to drive relevant traffic to your page to see if you can generate leads for your service. When you generate some leads, get on the phone with them and pitch your business. If they are interested, you can let them know you will be launching soon and you will notify them. If they aren't interested, it will help indicate if your idea is something that people want.
For a few hundred bucks, and using a simple landing page, you can generate sufficient data to help you understand if you are heading in the right direction.

Another tool I like to use is Survata. With just $100 you can get 100 objective survey responses from your target audience.
I also wrote a blog post about how to validate your idea. You can check it out here:

http://www.startuprevival.com/7-ways-to-validate-your-idea/

Cost per user acquisition of iPhone game apps really depends on the game and the subject matter of the game.

Here's some general data on the topic of cost per installs:

iOS app CPI Globally – $1.24
iOS app CPI in US – $1.64
iOS app Cost Per Loyal User in US – $2.78
iOS app CPI in Europe – $1.4
iOS app CPI in Asia – $0.90

Getting a user to install the app is one step. Getting them to register is the next step.

I will need to know more about the game to speak more deeply to the details, but if it's a general game that's fun to use, and looks appealing, my hunch is you should be able to hit to these CPI numbers.

How to acquire the users is the next strategic question.

What's your target CPL? This is going to be the key piece of data in determining where and how you can generate and pay for leads.

If you know your target CPL and marketing budget, then it's a pretty straightforward effort to drive traffic and generate leads.

I also recommend building out a lead form using a platform such as Unbounce or Leadpages.

Once you have a solid lead form for generating leads for your service, then you can market the page across all channels.

Do you have an idea of the cause of the decline?

It is important to isolate the problem first. Why is your business declining after many years of success? Is it a competitive threat? Is it a tired business model or stale value proposition? Have you been eclipsed by better options?

Once you figure out the "why" behind the decline, you can move towards developing a solution to correct course.

What is your business and what industry are you in?

Probably not, if I'm being totally honest.

But I must say, it's a good idea to use Clarity for market research and idea validation!

Maybe I'll add it to my list:
http://www.startuprevival.com/7-ways-to-validate-your-idea/

I would create a market research survey and send it around to professionals you know. Clarity users may not be the right audience for this idea, but there may be another audience that would be interested in the concept.

There is a lot that goes into SEO, from content, length of articles, the way your app is built, etc.

Good content is still king when it comes to SEO. If you are creating content that people are looking for, it will get indexed, and other publishers will link to your content (this is a big piece of the SEO puzzle).

Here are some best practices from Moz:
https://moz.com/blog/15-seo-best-practices-for-structuring-urls

Hope this helps!

I recommend going into an incubator or accelerator when you have a team and an idea, or company already started.

My company went through the Capital Factory accelerator in Austin, and having access to the network of investors, mentors, peers, and resources was absolutely worth it.

This is a broad question, which would really benefit from a much deeper understanding of where you are at and who you are as a professional, but here are a few tips:

#1
A good idea will solve a problem. You want to be building a pain killer, as opposed to a vitamin.

#2
Once you feel like you have a problem to solve, you should validate your idea. Here are some simple tips for validating your idea: http://www.startuprevival.com/7-ways-to-validate-your-idea/

I also recommend entrepreneurs to test the market by setting up a landing page and sending some traffic to it. Unbounce is a great tool for building landing pages.

With a modest budget (just a few hundred $) you can drive traffic to your landing page through Google Adwords. Try and get people to fill out a lead form or sign up for a trial of your product. If you get some leads, it will help you understand if there is demand for your idea. If you don't, it could mean there isn't a strong demand.

You could also buy some market research data using a tool like Survata.

#3
Once you have a validated idea that solves a problem, make sure it is something that you have 1. an interest in and are passionate about, 2. you could execute on with your skill set.

There are a lot of great ideas out there that solve problems. But it's important to make sure it's the right fit for you.

Best of luck!

What's your product?

You might try Upwork.com. There are many international freelancers who might be a fit. Make sure you properly vet them, though. I have had good experience using Upwork, but you have to weed out the really low quality talent.