Documented Tyme import

README.md

@@ -11,7 +11,8 @@ make
 
 ## Usage
 
-Please make sure to `export ZEIT_DB=~/.config/zeit.db` (or whatever location you would like to have the zeit database at).
+Please make sure to `export ZEIT_DB=~/.config/zeit.db` (or whatever location 
+you would like to have the zeit database at).
 
 ### Track activity
 
@@ -67,6 +68,26 @@ zeit erase 14037730-5c2d-44ff-b70e-81f1dcd4eb5f
 zeit import --help
 ```
 
+#### Tyme 3 JSON
+
+It's possible to import JSON exports from [Tyme 3](https://www.tyme-app.com). 
+It is important that the JSON is exported with the following options set/unset:
+
+![Tyme 3 JSON export](documentation/tyme3json.png)
+
+- `Start`/`End` can be set as required
+- `Format` has to be `JSON`
+- `Export only unbilled entries` can be set as required
+- `Mark exported entries as billed` can be set as required
+- `Include non-billable tasks` can be set as required
+- `Filter Projects & Tasks` can be set as required
+- `Combine times by day & task` **must** be unchecked
+
+During import, *zeit* will create SHA1 sums for every Tyme 3 entry, which 
+allows it to identify every imported activity. This way *zeit* won't import the 
+exact same entry twice. Keep this in mind if you change entries in Tyme and 
+then import them again into *zeit*.
+
 Example:
 
 ```sh