If one or more character strings match the format of a decimal number, the app captures the respective frame from the video stream into an image and requests the user to proofread the recognized number. If more than one number is recognized, the user is given the opportunity to pick the correct one. The results from OCR are thus reviewed and, in cases of errors, edited by the user within the app's interface. To facilitate this step, the app includes the options to (a) edit and correct numbers where the OCR algorithm is unconfident about its own results, (b) shift the comma in the number flexibly using chevrons which were added to facilitate simple decimal point shifting (see SI for details) and (c) adjust the unit of the OCR output where required (e.g. changing from gram to milligram). Once approved by the user, results from the measurements are automatically saved into an in-app archive in case the task needs to be referenced again. This archive includes the image used for OCR to ensure transparency of the weighing and, if applicable, editing processes. Last, the results can then be sent for use and storage to an external system such as the Chemotion ELN.