Looking for feedback on my (micro?) SaaS

Hello everybody, I'm Franco Montenegro, I'm relatively new here at IndieHackers. Like many of you, I'm building my own tool/SaaS. Mine just happens to be a very simple and light application for freelancers to track working time and create invoices/reports.

I have been working on this project in my free/spare time for the last 7-8 months or so and I think it's more or less ready to be presented. I know that you may be thinking "well, if you waited THIS long, perhaps you should have asked for feedback a LONG time ago", and I agree. In fact, from the very beginning I did a lot of things "wrong":

• Did not choose a standard tech framework (everything is from scratch, plain good ol' JS and CSS for the frontend and C with SQLite for the backend)
• Did not communicate with potential users or anyone for that matter (I'm building this for myself)
• I don't think I have a strong advantage over the competition. Most of my "why did you build this" are based on my beliefs

And so, WHY did I build this? Well, it's actually quite simple:

• Wanted something really simple, light, and fast that just worked. No unnecessary or extra features, just a working time tracker and billing.
• No analytics (tools such as Google Analytics and FullStory are a big no-no in my book)
• Privacy. I only ask for your email so that you can recover your account if you lost it. All the rest gets handled by shareable links (invite people to your projects and share reports/invoices) Also, I'm planning on using cryptocurrencies to handle payments.

And finally, because I'm quite stubborn and just simply wanted to do it, and do it in my own way. I had an itch and had to scratch it. I wasn't gonna be satisfied until I did it. Of course, this is something personal but I wouldn't be surprised if more people faced this.

So back to the topic of this post. I'm reaching out to you guys to ask for your feedback, brutal, honest-to-the-bone feedback (you know, the kind that we all wanted, right?) Specifically, I would like to know if:

• This tool seems useful to you and if not, what do you consider it's missing?
• If you would use this tool, how much would you be willing to pay monthly?
• General feedback/comments and suggestions

Thank you all in advance and I wish you the best for your own tools/SaaS!