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christoph123

25 karma · joined July 29, 2025

Solofounder into productivity, effective altruism, burner culture. German in Amsterdam.

Feel free to contact me at christoph at donethat.ai

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christoph123··on Show HN: Botacts – Phonebook of AI Bots
Yes they should be
christoph123··on Ask HN: What are you working on? (June 2026)
A habit building app that sends money to charity if you didn't do the thing.

https://app.euzoia.org

christoph123··on Ask HN: What are you working on? (June 2026)
Thanks! As a German myself I couldn't resist calling it that haha
christoph123··on Ask HN: What are you working on? (June 2026)
For most people, time is more valuable than money, yet we obsess over budgets and never look into time spent.

I think that's because time tracking is hard and annoying, that's why I made it "set and forget" instead of requiring a new habit.

https://donethat.ai

christoph123··on Show HN: AI watched my screen for a year. Weather beat sleep
Thanks! I think part of it is unrealistic expectations for what's normal. When you read everywhere 9/9/6 is the way to go you don't want to face your "low productivity". My brain stops working after 7 hours and I get headaches if I work weekends. I hope that by putting out more data like this we can move the expectations to healthier norms again.
christoph123··on Ask HN: What are you working on? (May 2026)
A proactive AI that asks you for your daily goals and checks in if you're not working on them.

Right now working on framing this as an RL problem to better predict when nudging is actually successful and what kind of wording works best given the user data. Then applying the same logic to onboarding emails etc.

https://donethat.ai

christoph123··on Ask HN: What Are You Working On? (April 2026)
https://donethat.ai/vibeit

A tool to estimate if you should vibe an automation/app or just buy/delegate/grind instead

christoph123··on The Importance of Being Idle
I don't know... I know a few people who inherited enough money to be idle and they don't seem particularly happy with their idleness. Could of course be the social pressure we live in, and that could change if we're all idle.
christoph123··on Ask HN: What Are You Working On? (March 2026)
A simple PWA habit tracker that sends your money to effective charities if you don't stick with your habits

https://app.euzoia.org

christoph123··on Ask HN: What are you working on? (February 2026)
I built mine with all kinds of privacy features built in: from never storing raw data to always allowing to review before sharing anything to always offering to pause, excluding apps, deleting data, opt-in for social features, …

So spyware in the sense of getting information without the employee knowing would be impossible and not something I’d ever want to do.

It does enable transparency on a very abstracted level: your team could see a six bullet point summary of your day if you opt in. I believe this kind of transparency can actually help more teams go remote, cut down on sync meetings, etc.

I’m currently experimenting with a feature that shows relative time spent only, not absolute - so e.g. 30% on project X, 20% on admin, etc. That could be the sweet spot on visibility vs privacy.

christoph123··on Ask HN: What are you working on? (February 2026)
A substack for 80/20 life advice and behaviour change.

https://euzoia.substack.com

Full project: https://euzoia.org

Tried to be super low-tech: Notion, super.so, Spotify creators, riverside.

Now thinking of building an email-based agent for behaviour change accountability. Would love any pointers to good UX for email-based AI assistants.

christoph123··on Ask HN: What are you working on? (February 2026)
https://donethat.ai/profile/christoph

An AI based time tracker: reconstructs your day from whatever it sees you doing. Screenshot based but never stores them.

https://donethat.ai/data

The same tech stack is pretty easily adaptable to openclaw tracking. If anybody would like to try, DM

Also looking into AI based security tools for monitoring security of DoneThat. Thinking of using zeropath would love to hear if people tried them / have other suggestions

christoph123··on Ask HN: What are you working on? (January 2026)
Totally understand that. I’m trying everything I can to make it as secure and private as possible, see https://donethat.ai/data but can never be 100% of course. At the /compare link I list some open source tools that try to do something similar fully local.
christoph123··on Ask HN: What are you working on? (January 2026)
A Substack for 80/20 life advice that gets repeated every year. We all know what to do, the idea of this is to remind us every week of one aspect of life and what best practices are for that area.

https://euzoia.substack.com The concept: https://euzoia.org

Tried to do this as low tech as possible, so website is just an off the shelf notion wrapper

christoph123··on Ask HN: What are you working on? (January 2026)
Still an AI time tracker that watches your screen.

Currently experimenting with a proactive agent, Don, that pops up like clippy and also works over email.

https://donethat.ai All the data security measures here: https://donethat.ai/data And other tools out there: https://donethat.ai/compare

christoph123··on DNA Learning Center: Mechanism of Replication 3D Animation
"Intricate as this mechanism appears, numerous components have been deliberately left out to avoid complete confusion" :D
christoph123··on Ask HN: What Are You Working On? (December 2025)
Also: A mini-tool that estimates the value of an hour of your time https://donethat.ai/time-value-calculator
christoph123··on Ask HN: What Are You Working On? (December 2025)
A fully automated time-tracker that feeds screenshots into llms to help you spend your time where it matters to you.

https://donethat.ai

With lot's of built-in data privacy safeguards https://donethat.ai/data

Also made an overview of similar tools out there https://donethat.ai/compare

Recently broke on Linux with a Wayland security update, working on a fix! Using Electron for cross-platform.

christoph123··on Limitless (Rewind) Aquired by Meta
Shutting down Rewind completely, limitless not available anymore in EU, UK, Brazil, Israel, South Korea, Turkey, China, won't be HIPPA compliant anymore
christoph123··on Ask HN: What Are You Working On? (Nov 2025)
I am right now building a proactive coach on top of my AI work capture app. Concept is very simple: It takes a screenshot every few minutes and analyzes what you're working on. From there it identifies task blocks, and checks if it should start a chat based on your intentions (eg to tell you to move out of your rabbit hole, take a break, help with a task, ...)

https://donethat.ai Passively processing screenshots is obviously pretty sensitive, it has an option to bring your own (local or remote) LLM, otherwise I process with gemini and never store any data.

It's in beta right now so if you want to try it you have to enable "proactive chat" in settings.

I also made a list of similar tools out there: https://donethat.ai/compare

christoph123··on Show HN: Phrasing.app – learn and maintain multiple languages
Been living in Amsterdam and six years in still don't speak Dutch. Maybe this is the moment... How to do you ensure quality in 90 languages? Seems impossible for a one-person-show if even Duolingo is only managing to do pretty basic examples?
christoph123··on Ask HN: What are you working on? (October 2025)
An app to track my work automatically by feeding screenshots to LLMs and analyzing those. https://donethat.ai

Obviously this is quite sensitive data so architected it to never store raw data, allow for bring-your-own-key, and even in team settings be fully private by default, everybody keeps control of all their results.

Started about six months ago, have some first users, and always looking for feedback!

christoph123··on AI tools I wish existed
On your request 12

> A local screen recording app but it uses local models to create detailed semantic summaries of what I’m doing each day on my computer. This should then be provided as context for a chat app. I want to ask things like “Who did I forget to respond to yesterday?” I've been using Rewind for a year now, and it's nowhere near as useful as it should be.

I am building something like this but unfortunately not local because for most people's machines local LLMs are just not powerful enough or would take too much drain on battery. Work in progress, always curious for feedback! https://donethat.ai

If you want fully local, somebody did a post on HN on something related recently: https://news.ycombinator.com/item?id=45361268

christoph123··on Ask HN: What are you working on (September 2025)?
Working on https://donethat.ai - a fully automated work tracker and in the future also AI coach.

The concept is pretty simple: It takes screenshots every few minutes and reconstructs a calendar of what actually happened. On top of that features to set goals for how much time to spend on topics and a social feed.

This is obviously super sensitive data. I built it in a way that it never stores raw data and you can also bring your own Gemini key, plus a lot more privacy features. Tried to make it fully local but found that it takes too much energy and only works on high end machines.

I have a few first users, iterating with them, and right now exploring if it’s possible to make this work in team settings without sacrificing privacy.

christoph123··on Show HN: Dayflow – A git log for your day
If you're on Windows, give this a try: https://donethat.ai - cloud-based but you can use your own gemini key
christoph123··on Nostr
What's a good place to get started? Any favorite apps from these? https://nostrapps.com/
christoph123··on Show HN: AgentMail – Email infra for AI agents
Was thinking of building something similar, considering just using yours now, looks great!

Postmark just made an open-source MCP server. I am using postmark already. Why would I use your tool? https://github.com/ActiveCampaign/postmark-mcp

christoph123··on Show HN: Grant Writing AI for Nonprofits
Was thinking of sharing this with NGO friends but missed a social proof. Any logos you worked with you can share?
christoph123··on Tell HN: I underestimated how lonely building solo can be
Two things work for me 1) Bonding with other solofounders over how miserable LLMs are to work with 2) Users. Talking to users. Great to bounce ideas of, and so rewarding.
christoph123··on I launched 17 side projects. Result? I'm rich in expired domains
I sank three years of side-project time into a project that was doomed to fail if I would've faced reality and thought about distribution more. Better to stop after three days than three years ;)
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