With the latest Timesheetr update we are happy to support non-standard bracket sizes (or time slots).
The bracket size is the smallest amount of time (or time resolution) that you can track time for.
The original setting (and still the default) is 15 minutes. This means you have 4 time slots in each hour. And this works for many organizations. The smaller the bracket, the more attention time tracking might take. 15 minutes seems a fair amount, not too much, not too little.
Some organizations (for example an attorney firms) may charge per 5 minutes or 10 minutes, so they need to be able to track in a higher resolution. And with the latest update, that is now indeed possible.
You can find this setting on the Account page.