Yes, this is true. I only discovered wakatime a few days ago. The major difference at the moment is wakatime's free plan only includes 1 week of data retention, whereas Koala's plan includes indefinite data retention.
I see. So how are you monetising? I've considered becoming a subscriber to wakatime purely to help them keep it running. I've just never needed to have my exact data from a long time ago, their daily/weekly summaries is good enough.
The focus now is on increasing the retention of a small user base. I first want to make sure things work super easy and the added value is clear. For example, in our Atom plugin, you can just sign in and it's all set up. You don't need to copy any access token manually.
Monetization will happen when we start focussing on teams, managers and invoicing.
Which editor do you use btw? Please try Koala for a week as I'm eager to receive feedback. Which editor do you use btw?