It depends on the economics of your revenue model but as a general rule, $3.00 is the high point and $1.00 - $1.50 is the target range.

It's nearly impossible to benchmark this number with any accuracy because so many variable affect the CPI for Facebook ads: competition, demographic, season, and so forth. But I can tell you that the best way to figure out your own potential ROI, would be to create a bunch of different ads (using variations of images, colors, headline, body copy, and call-to-action) and give them $5-$10 budgets. That way, you can split test different ads against one another and figure out whether or not Facebook ads are going to deliver a great ROI for you. Your very worst FB ad may deliver satisfactory results, or your very best-performing FB ad may still lose you money in the long run. You won't know if FB is viable for you specifically until you give it a try. Hope this helps, Austin

This totally varies, as you increase targeting, with Look-a-likes, custom audiences, retargeting, etc your CPI should theoretically come down as your most relevant users convert better.

Typical CPIs range but typically can sit as low $5CPI or as high as $25CPI again depending on the cohorts you are trying to reach. Typically gaming is pretty competitive with companies, individuals, bidding very aggressively on an oCPM against potential paying player mobile gaming cohorts.

Facebook moved away from the precise interest targeting they had as they have been looking for people to upload custom audiences and create look-a-like audiences of your existing customers. These, theoretically, depending on your vertical, again should convert much better than interest targeting.

CPI goes from 0.50 $ up to 2$. However, there are several factors that need to be considered, in particular:
A) Type of App:
Some apps can pinpoint the competitive advantage that Facebook Advertising possess, such as a great audience targeting or precise interest targeting (dating, gambling, classified, e-commerce)
B) Budget:
Facebook is the biggest publisher and users spend on this app up to 18% of the total time spent on Mobile. However, the more you want to spend, the more different campaigns you need to carry out to keep the performance at a good level. If you want to spend 2000$ a day with the same banner, targeting the same audience, your CPI will rise day by day.
C)Measurement:
Facebook shows both post-click and post-impression installs, as an indirect effect of their branding advertising. Normal display networks show only post-click installs and measure the CPI based on that. Therefore, Facebook CPI is lower (discrepancy between post-click and post-impression is normally around 10%).

Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath