Syncing several videos

Hi everyone,
I've tried to find an answer to this for quite some time, but haven't found the answer, nor cracked it myself yet. I googled, checked the forums, as well as a multitude of youtube videos.
I used Filmic Pro to record three movies, about 30 min each. However, when I transfered the files to my PC, they have been divided into about 12 files. The end of each clip has an overlap with the next clip of about 4 seconds, except for the end/beginning of the actual takes. The length of them varies. I checked with Filmic Pro, and this has to do with hardware/os variances between their app, and our phones.
I have tried to align all these clips into three coherent movies, using audio sync, multicam bin, etc. But in none of the ways I tried has the algorithm been able to sync them up, and create three clips that I then can use for my timeline (One at a time).
I successfully did something similiar when I had a main camera, and two other angles. Using the audio from all three it was easy. But the main camera was a constant throughout the whole take. Here I'm trying to create one take, containing the merged snippets, using the overlap as a guide)
I assume, as there is an overlap of both audio/video, I should be able to sync them using some kind of procedure, rather than doing it manually eye/ear.
Any advice would be appreciated. Either within DaVinci, or a third party tool.
I've tried to find an answer to this for quite some time, but haven't found the answer, nor cracked it myself yet. I googled, checked the forums, as well as a multitude of youtube videos.
I used Filmic Pro to record three movies, about 30 min each. However, when I transfered the files to my PC, they have been divided into about 12 files. The end of each clip has an overlap with the next clip of about 4 seconds, except for the end/beginning of the actual takes. The length of them varies. I checked with Filmic Pro, and this has to do with hardware/os variances between their app, and our phones.
I have tried to align all these clips into three coherent movies, using audio sync, multicam bin, etc. But in none of the ways I tried has the algorithm been able to sync them up, and create three clips that I then can use for my timeline (One at a time).
I successfully did something similiar when I had a main camera, and two other angles. Using the audio from all three it was easy. But the main camera was a constant throughout the whole take. Here I'm trying to create one take, containing the merged snippets, using the overlap as a guide)
I assume, as there is an overlap of both audio/video, I should be able to sync them using some kind of procedure, rather than doing it manually eye/ear.
Any advice would be appreciated. Either within DaVinci, or a third party tool.