A frequent problem that I have seen while working on scouting is the need for any specialized scouting app to be updated year after year, and the inability to have alternative data gathering methods. In response to this, I wrote the following website: https://spider.octyl.net.
This website is more of a client-side webapp, and allows loading a CSV file into your browser as a table. The table supports sorting on any column, with auto-detection of data type (boolean, integer, float, and string/text are supported). There are also buttons for adding columns together to create a “score” column, or averaging values.
The advantage of this site is that it does not use any game-dependent information, as all column names are determined from the CSV. Additionally, using such a generic format allows easy importing from many scouting sources (paper can be typed into Excel or Google Spreadsheets, Google Forms could be used to submit to a spreadsheet, some scouting apps export CSV data).
The source for this site is available here: https://github.com/Team5818/SpiderEyes
The source also contains more detailed explanations of the various features available.