The aim of this application is to simplify planning of the Hattrick team development. This application is purely front-end based meaning that, anything that you input here is not send back to the server. However, this application uses your private local browser storage to save data between sessions. To back up your plan (and potentially share it) you can use save button (diskette icon) to export data to the file on your computer.
By clicking on the big 'ADD PLAYERS' button one can add custom players. The 'Player Details' form also accepts player data pasted directly from Hattrick (use 'Copy to clipboard' button in Hattrick, but this might not work very well when using language different from English).
Then you can click players name inside the SQUAD table to view auto-calculated details about players, like HTMS28, estimated wage or best position. Be aware that wage is just very rough estimate.
There is an experimental function that lets you paste whole squad from Hattrick at once - just copy table generate by Foxtrick and paste it directly on main page (not in 'Player Details' form). Be aware that this can take some time, especially when you have already added training stages.
By clicking on the big 'ADD TRAINING STAGES' the training phases are added and results are auto-calculated. When you add the training stage, you can then open the particular training stage and fine tune details for every player separately: 'SQ' field specifies if player is part of the team (if not checked, then player does not age or train) - this is useful for players that you plan to join your team in the later training stages. 'FT' means full training, 'HT' means half training. Again, the player name can be clicked to let you see more info in any particular stage. If you right-click on any checkbox then the whole column gets checked/unchecked (e.g. if you click on some checked checkbox in 'FT' column, then all the other checkboxes in this column will get unchecked, not only the one you right-clicked).
Here you can simulate your ratings. This part is basically stripped out and rewritten from Hattrick Organizer. It's accurate pretty well for long term planning purposes, but there are definitely better tools for planning lineups out there.