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Show HN: I made an app called Girl Math that makes saving money fun

https://apps.apple.com/us/app/girl-math-savings-tracker/id6751606640
4•jfeng5•2h ago
Girl Math started as a weekend project when I realized my friend was terrible at saving money but amazing at justifying purchases with elaborate mental gymnastics.

Then I thought: what if that same creative energy actually helped you save?

The app turns "I didn't spend" moments into visible progress toward things you really want. Set goals, log tiny wins in seconds (skipped a latte, walked instead of Uber), and watch a satisfying progress bar fill up with haptics, confetti, and a playful receipt at 100%.

Under the fun, it's a habit loop: immediate dopamine for the right behavior, one active goal for focus, and daily micro-wins that build real momentum. No spreadsheets, no guilt trips. Just making your small choices feel like they add up to something bigger.

Runs entirely on-device with no accounts or tracking. Just you, your goals, and your wins.

I'd love your feedback, and if you've got a favorite girl math moment, drop it below so I can add more examples to inspire users!

Accounting for AI

https://cernocapital.com/accounting-for-ai-financial-accounting-issues-and-capital-deployment-in-...
1•mxschumacher•2m ago•0 comments

High Levels of THC Associated with Psychiatric Disorders

https://www.acpjournals.org/doi/10.7326/ANNALS-24-03819
1•wjb3•4m ago•0 comments

Show HN: I made a website to track my subscriptions

https://vexly.app
1•hoangvu12•5m ago•1 comments

Why is modern data architecture so confusing? And what made sense for me

https://www.exasol.com/hub/data-warehouse/architecture/
1•chauhanbk1551•8m ago•1 comments

Plant-Heavy Diets' Link to Reduced Cancer Risk Strengthened

https://www.medscape.com/viewarticle/plant-heavy-diets-link-reduced-cancer-risk-strengthened-2025...
1•wjb3•11m ago•0 comments

The future is compostable. Period

https://news.ubc.ca/2025/09/the-future-is-compostable-period/
1•gnabgib•11m ago•0 comments

How can I influence others without manipulating them?

https://andiroberts.com/leadership-questions/how-to-influence-others-without-manipulating
1•kiyanwang•15m ago•0 comments

Building what customers need, not just what they ask for

https://linear.app/now/building-what-customers-need
1•destel•16m ago•0 comments

Leaders Can Frame Messages for Influence

https://medium.com/onebigthought/the-magic-of-framing-the-message-fb48e0765996
1•kiyanwang•19m ago•0 comments

Show HN: Captur Compressed a Multi-Task Model into the Size of a Single Photo

https://captur.substack.com/p/how-captur-compressed-a-multi-task
1•tstonez•21m ago•0 comments

Show HN: Apple Container MCP Server (ACMS)

https://github.com/gattjoe/ACMS
1•joegatt•22m ago•0 comments

OpenSSF: Best Practices

https://best.openssf.org/developers.html
1•Brysonbw•23m ago•0 comments

Tiny reactors could one day power towns, campuses; community input will be key

https://theconversation.com/nuclear-in-your-backyard-tiny-reactors-could-one-day-power-towns-and-...
1•rntn•30m ago•0 comments

Looking for feedback on AI system design interviewer

2•notjunior•30m ago•0 comments

OCR Showdown: Cardinal vs. the Rest

https://trycardinal.ai/blog/ocr-showdown
1•jiannaliu01•32m ago•0 comments

Amazon Ends Commingling

https://www.geekwire.com/2025/after-years-of-backlash-amazon-finally-ends-a-practice-that-many-se...
2•qingcharles•35m ago•1 comments

My new Git utility `what-changed-twice` needs a new name

https://blog.plover.com/2025/09/21/#what-changed-twice
2•jamesbowman•36m ago•0 comments

Kernel Security in the Wild: Side-Channel-Assisted Exploit Techniques, Kernel-L [pdf]

https://tugraz.elsevierpure.com/ws/portalfiles/portal/98775241/main.pdf
1•todsacerdoti•37m ago•0 comments

Running Nvidia CUDA PyTorch container project/pipelines on AMD with no changes

1•medicis123•41m ago•0 comments

Building a (Not Very) Portable Xbox

https://hackaday.com/2025/09/21/building-a-not-very-portable-xbox/
2•rolph•43m ago•0 comments

Zebra cows and Teflon food make Ig Nobel Prize winners

https://www.bbc.com/news/articles/crkjzxrrkd5o
1•gebt•50m ago•0 comments

Visualizing the UUID for Different Versions

https://gangtao.github.io/visualizing-uuid/
2•gangtao•56m ago•0 comments

Rave Flyers

https://www.counter-print.co.uk/search?q=rave%2bflyers
3•rglover•56m ago•0 comments

A super-intelligent AI won't kill us, people believing the AI will kill us

3•OhMeadhbh•57m ago•1 comments

iPhone Air sets the stage for the future

https://betterdesigned.io/p/iphone-air-sets-the-stage-for-the
1•pwthornton•1h ago•1 comments

PostgreSQL 20.15: OAuth Authorization/Authentication

https://www.postgresql.org/docs/18/auth-oauth.html
3•stephenlf•1h ago•0 comments

Show HN: Rerouter – minimalist no-code automation platform

https://rerouter.app/
1•Cabbache•1h ago•0 comments

AI will make smart people smarter and stupid people dangerous

3•eibrahim•1h ago•4 comments

Show HN: Gocd – a lightweight Go-based CI/CD tool that runs on your dev machine

https://github.com/simonjcarr/gocd
4•soxprox•1h ago•0 comments

Canon EOS C50 is its smallest and lightest cinema camera

https://www.dpreview.com/news/0631874757/canon-eos-c50-cinema-camera-announcement
2•PaulHoule•1h ago•0 comments