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Hi, kalkotekedar. It's hard to say which is the best solution for crashlytics, please choose the solution based on your requirement. If you encunter some issue while use the crashlytic api such as AppCenter Crashes, it's suggested to that you seek App Center support in its portal because App Center Diagnostics is a cloud serviceand the problem is usually related to the server side.
Best Regards,
Jarvan Zhang
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