A crash log tells you where the code failed, and the person it happened to can tell you what they were trying to do. This app crash report survey asks four questions in about a minute: the task in progress, whether any work was lost, a screenshot if they can add one, and any detail that would help your team reproduce the crash.
It is written for the next session after a crash. In a web app, the page error trigger (from Starter, or on 1 survey on Free) can open it when the page hits an error, or your code can fire a custom event on the next load. Inside a phone app, have the app open the survey's link the next time it starts after a crash, with the app version added to the link as a tag, such as ?app_version=4.2, so each answer keeps it for workflows and Google Sheets.
Usertick reads each written answer as it arrives, files it under a category such as speed and reliability, marks it as a bug or a complaint and gives each response an urgency, so a crash during payment that lost work rises to the top. Results shows the share of each task, the share who lost work and a gallery of screenshots, each against the period before.