According to Salesforce documentation (https://help.salesforce.com/articleView?id=limits_mobile_sf1_analytics.htm&type=5
), when you are in the mobile app and open a Report via the Report tab, it will not show the report chart within the Report. If you open a Report via a Dashboard, then you can see the report chart. This doesn't make any sense and if a Report is saved with a chart in it, then the chart should be visible no matter where you open the Report from. Also, since Reports in the mobiie app don't include grouping and all Reports are converted to a super non-helpful format of tabular (see other Idea: https://success.salesforce.com/ideaView?id=0873A0000015A2FQAU
), having a chart to visualize what's going on with the data is crucial. Please just show the report chart in the mobile app if the report is saved that way on the desktop version.