u/Dazzling_Vehicle_999

I'm developing an app in react native that is heavily dependant on the phone's compass bearing.

While testing (same conditions) i have noticed big differences in compass accuracy between different types of phones (i haven't tested any ios phone).

I have included a custom calibration module where the user must point to a known feature/building and indicate said featureon a map, but its cumbersome and i doubt many user will take the time.

I have looked for libraries with known compass deviations per phone model, but couldn't find any.

Has anyone encountered this problem and found a good and lasting solution? Any suggestions on how to reduce these compass inaccuracies across different types of phone?

I am interested in studying geomatics and having a degree. I'm looking for full online courses that can be combined with work at a reasonable price.

After combining these criteria I end up with very few possibilities. One of which is unogis msc From salzburg University.

Can someone with more knowledge of this master program tell me if it's worth it? Sufficiently interactive and well explained to do fully online? What are the carreer possibilities afterwards? Is the 13000 price tag worth it?

In the age of AI, is there still a clear added benefit of spending that amount of money?

Total beginner, no formal background. Want to self-study remote sensing fundamentals (EM spectrum, sensors, resolution types, optical basics), as well as SAR and LiDAR modelling

What free resources actually worked for you?