Show HN: Dayflow – A git log for your day (github.com)
Here's what it does:
- It creates a semantic timeline of your day;
- It does it by understanding the content on your screen (with local or cloud VLMs);
- This allows you to see exactly where your time went without any manual logging.
Traditional time trackers tell you "3 hours in Chrome" which is not very helpful. Dayflow actually understands if you're reading documentation, debugging code, or scrolling HN. Instead of "Chrome: 3 hours", you get "Reviewed PR comments: 45min", "Read HN thread about Rust: 20min", "Debugged auth flow: 1.5hr".
I was an early Rewind user but rarely used the retrieval feature. I built Dayflow because I saw other interesting uses for screen data. I find that it helps me stay on track while working - I check it every few hours and make sure I’m spending my time the way I intended - if I’m not, I try to course correct.
Here’s what you need to know about privacy:
- Run 100% locally using qwen2.5-vl-3b (~4GB model)
- No cloud uploads, no account
- Full source available under MIT license (https://github.com/JerryZLiu/Dayflow)
- Optional: BYO Gemini API key for better quality (stored in Keychain, with free-tier workaround to prevent training on your data)
The tech stack is pretty simple, SwiftUI with a local sqlite DB. Uses native macOS apis for efficient screen captures. Since most people who run LLMs locally already have their tool of choice (Ollama, LLMStudio, etc.), I decided to not embed an LLM into Dayflow.
By far the biggest challenge was adapting from SOTA vision models like Gemini 2.5 Pro to small, local models. My constraints were that it had to take up <4GB of ram and have vision capabilities. I had to do a lot of evals to figure out that Qwen2.5VL-3B was the best balance of size and quality, but there was still a sizable tradeoff in quality that I had to accept. I also got creative with sampling rates and prompt chunking to deal with the 100x smaller context window. Processing a 15 minute segment takes ~32 local LLM calls vs 2 Gemini calls!
Here’s what I’m working on next:
Distillation: Using Gemini's high-quality outputs as training data to teach a local model the patterns it needs, hopefully closing the quality gap.
Custom dashboards where you can track answers to any question like "How long did I spend on HN?" or "Hours until my first deep work session of the day
I'd love to hear your thoughts, especially if you've struggled with productivity tracking or have ideas for what you'd want from a tool like this.
71 comments
[ 3.0 ms ] story [ 86.3 ms ] threadi.e. apple watch for sleep, running, activity levels? it could really give a 360 view of your life
Some things I would like to be able to do with software like this:
- Identify the 'spark' of a distraction. For example, opening my email inbox to read a specific email also shows me many unrelated emails. These can easily be the cause of a 5-15 minute distraction. This information is often actionable. I installed browser plugins to hide my youtube suggested videos and my distractions went down. I made sure to close all unused windows to avoid catching a glimpse of unrelated work.
- Identify repeated tasks, and the cadence of those tasks. Do I manually make an invoice once a week for a particular edge case? Is the process basically identical every time. Could this be automated?
- How was I feeling before, during and after a task. (This is a very broad and intentionally not well-defined question, but I think it has the most promise for improving procrastination and task initiation).
She had been complaining the day before about having to reconstruct a huge bunch of little 0.1 entries involving e-mails to various individuals in cases. If it could be done automatically, through a local LLM? chef's kiss
Trust me, law is definitely where you want to land this thing.
In all honesty, I have absolutely no negotiating power or decision-making authority for my firm, but it's a big one -- if that's a direction you want to go, can't guaranty I can swing enough weight, but I probably could find you the right people to talk to, give you an introduction.
This could help battle procrastination, organize your time in a long run, bill your clients more efficiently, etc. 20 years younger, hyper productive me would kill for such product.
But then I recall when I accidently suggested TimeRescue to my boss at one time, and suddenly he was skimming though everyones daily logs to see if they're spending 100% of their times in business facing apps.
When I first heard about "covid mouse mover devices" that faked activity for remote workers I thought it was a joke. Seriously.
But I'm afraid this is the dystopian future. Employers constantly looking at your screen and getting spreadsheets with your daily effort.
Overall, very disturbing product.
https://brettterpstra.com/projects/doing/
Another approach is to run OCR on 1FPS screenshots. Everything runs locally without draining the battery like an LLM would.
1. "Create a reminder for reading this email at 5:00 pm" and this could infer what to do from the screen shot's description(plus a local MCP tool for calendar)
2. "Can you fetch that file form that project in that workspace and implement the pattern in the code on my vscode terminal?" It can lower cognitive fatigue of typing and clicking a bunch of place.
3. Take notes as I describe something on the screen. It could be for prompt composition e.g. get the link from my browser and the file on vscode and write code that does XYZ.
Replace PostgreSQL with Git for your next project for git data storing. https://news.ycombinator.com/item?id=4535144 https://devcenter.upsun.com/posts/why-you-should-replace-pos...
Consumer.today day-logging single user microsite. https://consumed.today/ https://news.ycombinator.com/item?id=45351446
Cute serendipity, rule of three. Neat project too; conceptually it sounds like an amazing ability to be able to better watch ourselves. Doing it via screenshots & AI feels like a fun sense-making adventure that actually makes a lot of sense, that can maybe try to pick through & discern what the screen is doing in a lot of different scenarios.
Kudos particularly for the efforts you've gone to on explaining privacy implications.
Feel like something of this shape should have existed for a while, but this is very well executed!
As already seen in the comments there are lots of desires to add more data compared to just screen input.
Could be things like:
- Apple HealthKit / watch - custom apps - Phone logs
Also you stated, and true, that there is much focus needed on improving your core feature.
It might be interesting to allow some kind of API / plugin area. So that people can expand on your core feature and add the desired parts. Might in the future expand to some kind of AppStore like feature with plugins.
That would keep your work focused and allows others to make it complete in their vision, and for others.
If it’s recording 15 seconds, how often are you doing that? Once every 15m as the analysis interval is 15m?
So I'm not sure I buy the lightweight/low-impact claim.