Today I needed more than 10 different angles for our app (Flashlight) to send it to our designer. Then I find a really simple why and got more that 15 ideas in less than 10 minutes.
How?
I went to Google Play and find competitive apps, read all reviews with 5 stars and get a few really awesome ideas from real users. I hope that they will convert with profit. 
A few examples
Are You Afraid of the Dark?
Brightest Flashlight of 2014!
This is Equal To a Lantern!
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Did I reinvent the wheel? 
That's the same thing I did when I needed to come up with different angles for a battery booster offer. Worked great!
That's a very good tactic!
Check forums too - loads of genius angle ideas there.
Flashlight apps have flooded the App stores. You can buy a source code for $50 which is why there are soooo many. It worked really well a few years ago when most phones did not have it as part of the UI but that has changed now.
I would focus my angles on what's UNIQUE and DIFFERENT about yours.
- Floodlight that won't drain your battery
- One-touch flashlight
ec.
What about reading the 1 star reviews and finding common problems to solve.