AppFollow is well suited if you only operate in a few app store countries and don't have a high volume of keywords that you are looking to rank for. This is, of course, the free plan. Besides that AppFollow is well suited for communication with other apps - they have an open API and other connections to a ton of third-party analytical tools.
SEOquake is a great tool to use alongside Semrush with the quick data that it provides on the search results page it's helpful to make quick decisions. The ability to change the SERP locale is also really nice as it helps us analyze the search results page from different locations.
Gives a ton of SEO info in one area. I usually have to use a few different Chrome extensions that show different areas to get the full picture that this tool gives you up front.
It gives you info on ways to improve the infrastructure of your website.
The high-level parameters are nice to see, but for a new-to-the-tool person, they are confusing and don't provide a lot of explanation, unfortunately.
The keyword density section is somewhat helpful but gives the density in a percentage without rationale as to what an average percentage is or what the website should aim for.
While App Annie is extremely robust and pulls in data from acquisition channels, app stores, and elsewhere, it can be quite overwhelming at times. If you are looking for more simple and just keyword positioning then definitely look at AppFollow. Apart from the two platforms themselves, I've had numerous contact experiences with both AppFollow and App Annie. The winner is definitely AppFollow with a less aggressive approach and a higher willingness to go above and beyond to make sure all questions are answered. With App Annie I was bombarded with a ton of sleazy, sales emails to purchase their product.
SEOquake provides more information regarding backlinks and traffic in general whereas other tools focus more on keywords and their search volume. The backlinks information it provides is also really useful in making quick decisions on which site we can focus on more when it comes to searching for backlink opportunities.