
CalcioCalc
Free calculators for analyzing startup and marketing metrics.
@NAVNEET_CODES · X
Free AI, startup, and marketing calculators built for founders, marketers, students, and business professionals.
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Free calculators for analyzing startup and marketing metrics.
@NAVNEET_CODES · X
Free AI, startup, and marketing calculators built for founders, marketers, students, and business professionals.

Schedule and manage AI agent tasks directly from Google Calendar.
matt413 · HN
Schedule tasks for your AI agents from Google Calendar

Math toolkit for students: solve conversions, geometry, algebra, and trigonometry with step-by-step formula explanations.
@DullyAq · X
Check out what I just built with Lovable!

Convert PDF files to Excel spreadsheets using AI, handling both scanned and digital documents.
uri_merhav

Verify mathematical expressions reliably using five independent numeric engines via REST API and MCP.
@UtevR57878 · X
Not vibe-coded, rather AI assisted dev:

Upload a PDF bank statement, get a clean Excel or CSV file with every transaction verified against the running balance. Statements are never stored.
@bunedbek95381 · X
Built a tool that turns bank statement PDFs into verified Excel — it recomputes the running balance and flags the exact row that doesn't reconcile. Still early, would love feedback →

Interactive machine learning concepts — edit the input data, read the formula with your own numbers substituted into it, and step the algorithm one iteration at a time.
@Lovepre23243941 · X
Most ML explainers give you a diagram. I built one where you edit the data and the formula rewrites itself with your numbers. 42 concepts — k-means, backprop, HMMs, spectral clustering. no signup ,

Calculate net app revenue accounting for global commissions, VAT, and withholding taxes.
mangrove · V2EX
出海 SaaS/APP 怎么定价?手搓了个沙盘模拟工具 最近在和朋友一起看了下工具类产品的报表 发现有一些持续创收的产品,其实最终看下来,还是倒贴的 因为一开始就自己俩人捣鼓,也不懂专业的财务知识,后面慢慢才发现会存在 gap 值 这一些 gap 值的原因就是各种佣金、消费税和预扣税等等 而且这个和开发者账号主体以及产品推广的地区还都有关系 捋清楚之后,自己也做了这个工具 也希望有专业的小伙伴可以给点宝贵意见哈~ https://trueproceeds.com/

Free, accurate online calculators and practical guides for finance, math, health, construction, engineering, and everyday life.
@CoreToolLaxl · X
I'm building CoreToolLab, a free utility site with calculators for finance, health, education and everyday decisions. We're trying to make each tool genuinely useful rather than just another basic calculator.

Use 32+ free business calculators for profit margin, break-even, and tax analysis.
@BizCalcLab · X

Use 100+ free online calculators for math, chemistry, physics, loans, health, and AI costs—no signup needed.
u/averageChilean · Reddit
Built a free tool site to help my brother study — now has 100+ tools, would love feedback My brother's in high school and needed something more visual to study chemistry, physics, and math, so I used Claude to build him a simple site with interactive calculators and visualizers. I'm not a programmer or from a tech background, so without AI this wouldn't have happened, at least not this fast. It ended up helping him a lot more than I expected, so I kept expanding it, added a bunch of other

Use fast calculators and browser-local utilities for AI costs, local hardware, automation, website planning, and everyday decisions.
@Erko95261453 · X