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.
If you have any problems with your rankings or a decrease in ranking position within google it is very good to make an Link Audit with the Link Research Tools. Then you Screen all Links manually and setup your disavow-file easily. With the Link Detox Boost you gain Rankings back so fast. The last time we used it for a client, we got back the rankings within a week to 170 Positions within the Top Ten, even Position 1.
calculates the opportunity or risk of potential links that are not built yet, so you can go only after the good ones
gives you fresh data from 26 link sources and lets you analyze the full backlink profile. Google search console gives you only a sample of your backlink profile.
powerful link prospecting made easy
possibility to connect with Pitchbox (professional outreach tool for link removal and link building campaigns), SEMRUSH, Ahrefs, GSC
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.
LinkResearchTools is much more advanced in analyzing links. Period. All the other mentioned tools have many useful features for SEO but LRT is definitely the way to go for backlink analysis, link building, and competition analysis. They also offer very nice and quality courses for improving SEO knowledge. I already attended one of them and I am very satisfied with the knowledge I gained.