Show HN: Write It Down – Personal finance tracker (write-it-down.com)

271 points by LarsenCC ↗ HN
Everyone’s chasing AI hype. I built a Google Sheet and it quietly took off.

In 2020, I made it to track my own finances for income, expenses, savings, yearly summaries etc. I shared it once on Reddit, forgot about it for a year… When I checked back, it had over 130k views and I was honestly stoked!

No launch. No funding. No AI. Just a spreadsheet people actually stick with and find useful.

I finally gave it a proper home: write-it-down.com Now, more than 2,300 people use it.

It’s intentionally boring and that’s why it works.

People don’t always need AI. They just need something that actually solves their problem. This isn’t a billion-dollar startup of course, but it taught me more about building products than almost anything else.

Build something useful. Solve a real problem. Even if it’s just a simple spreadsheet.

So, what’s the most “boring” thing you’ve built that found unexpected traction?

43 comments

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Hey everyone,

Lately I’ve been exploring smaller, simpler projects like this one. I usually build backend systems (currently at Browser Use, funny enough).

This spreadsheet started as a personal finance tracker during COVID and somehow turned into something people actually wanted to use.

The biggest lesson for me: People don’t care how “advanced” something is, they just want it to work and make their life easier.

Curious to hear what you all think.

Making a product flexible often makes it complex to use, complex to develop, and mediocre at everything. Makes it easy for a small product that hyper focuses on one use case to swoop in and snatch users away.
True hype created by AI is huge. Everywhere I look it's always just AI. Man we need more apps like this that just do one thing and that's it.
I feel like the AI hype is big, but there are lots of us who just build normal things and who's jobs cannot allow or make use of LLMs properly.

Popular culture has always been easy to influence. We had blockchain hype, OOP hype, AI hype, Microservices hype, we had so many and they were ALL mostly a fad that resulted in yet-another-tool in the toolbelt of engineers -- nothing more, nothing less.

Good on you for using the right tools to build a new thing!

Congratulations on making the life of ~2k people a bit better.
Congratulations on the milestone!

The three small videos with the big cursor are excellent. What did you use to edit them like that?

I think consumer personal finance is hard to disrupt with AI for two reasons: (1) mistakes, hallucinations, etc., aren't acceptable; (2) there really aren't any major secret insights to derive from the data -- just spend within your means, avoid debt or use it sparingly and wisely, target high-interest loans first if you have them, maintain a sufficient emergency fund, max out tax-advantaged accounts, invest in low-fee index funds as much as you can after all of the former. There just isn't much more to it.

If you're already doing all those things, the best way you can help your personal finances is to make good decisions and work hard and with integrity in other areas of your life: grow your career and income, position yourself smartly to lower your odds of layoffs / termination / etc., take care of your health to avoid health-related income disruptions and costs (this includes mental health!), and make smart relationship choices (i.e., don't end up in divorce).

Personal finance is pretty much a solved problem. Breakthrough results generally come from personal and moral discipline sustained consistently over a long period of time. Simple tools like this can help a lot -- I like it.

> Built on Google Sheets you own your data

What?

/s

The testimonials on the landing page, where are they sourced from?
Did you purposefully write every paragraph of your intro post as an AI writing trope?
Small typo in the first paragraph:

"Strart" should probably be "Start" unless it's ragebait to gain engagement.

Getting 2k users is no small task, congrats.

Did most start using it when it was a free spreadsheet linked to a reddit post or have the 2300 users all bought the $4.99 product?

Has there been a change in take-up since you monetised it?

Actually, having AI to do this kind of schlep work of analyzing my spending is something I’m really looking forward to.
Wow. How did you do this? This is a saturated field, especially since the downfall of Mint. (Context: I made one of these too, but a minimal/fast HTML/CSS/JS web app. I use it myself, but have 0 users)
This is honestly not better than the LLM-powered double booking system where i just record in plain text, and have the LLM convert it into journal entries. the entire thing is in plain text and backed by git+remote. Recording finances is the hardest part about tracking finances because you tend to forget/get lazy/need to track across multiple family members etc.

This is solved via LLMs that can transcribe, categorise, convert messy records into structured book keeping.

I remain unconvinced that anything more rigid is more useful.

c'mon I'm all for the hustle but put a bit more effore to be creative. all your website reviews are AI generated 5 star slop
> Build something useful. Solve a real problem. Even if it’s just a simple spreadsheet.

I think saying _just_ a simple spreadsheet makes it sound like a bad thing. Actually, the simplicity is probably one of the key selling points! I wish more things were just spreadsheets.

It's possible to do the same with google sheets using GOOGLEFINANCE function and I have been using it to track and manage finances since years.
Very cool. What did you see to do the screen recordings?
This is awesome! I’m already integrated into TillerHQ. Apart from price, do you have any differentiators that make it take less time for auto categorizing? Tiller doesn’t have any built in AI tools for auto categorization so I had to roll my own.

Also I’m extremely skeptical of your pricing. $5 one time seems too good to be true.

Having bounced around several snoop-ware GUI-heavy vendor-lock-in personal finance products, I've this year been using and loving a similar product called Tiller, which absolutely convinced me that a spreadsheet is The Way for this.
I suggest you get rid of the obvious AI illustrations. They’re stylistically incongruent with each other and the rest of the page, perfect examples of slop which make me think the rest of the service was also LLM-generated.

“Opinions” is a weird way to put it, the typical word there is “testimonials”.

“Get Started” also doesn’t feel right to me, makes me think of a subscription service that will require lots of set up, which seems to be the opposite of what you’re going for.

> Build something useful. Solve a real problem.

This is the essence of how we should think about building products (or, at the very least, doing some projects). I see so many of my juniors are building "useless" stuff just to participate in the AI hype. Whereas simple and elegant solutions are often neglected.

Could you please share the original post that you made that has 130k views?

Obviously if a product/idea is good enough it can go 'viral' on its own with little prodding, but I'm curious about the discussion behind that post and how it may have taken on a life of its own.