Rounded durations

I’m using the Timelime app every day, bought the full version a few years ago. Today I gave Timeframe a try and missed the ability to configure the task list on the right side (i.e, round durations to 15 minutes or group by day & task). Is this feature only available in the paid plans?

Yes, these features are only available in the paid plans.
If you go to “Timeframe > Store…” in the app, you’ll get an overview of what’s included:
round durations → Timeframe Business plan
group by day & task → Timeframe Personal/Business plan