I was looking for TikTok analytic for a project and stumbled upon analisa.io which provided free TikTok reports. Unfortunately, the free version report only offers a little bit of information. I asked their team for a free trial, but they offered me a product tour instead and that was great. I subscribed to the plus plan for three month, and the experience was great. I can get historical data of TikTok stars profile and the trending hashtag for my project. They do have several downtimes when TikTok updated their system but the support team was quick to provide me manually generated report. I will definitely, use the service again for my future projects.