Free Calculator Tool

ChangeCrab is customer-facing changelog and release note software for software teams. Publish updates through embeddable widgets and hosted pages, email and RSS; collect feedback and votes; draft updates with AI; and integrate through an API and webhooks. A free plan is available, with Premium at $19.95/month. Its API enables AI tools to manage changelogs and posts.

AI monetization tools

Free ai prompt engine — developer tool built with Next.js and deployed on Vercel

FaceRater is a free face rating tool: upload one clear photo, get a score out of 10, ten labeled measurements, and a map from 478 facial landmarks. Free analysis runs on your device — no account or card. Optional one-time reports go deeper with 44 measurements across 7 regions, styling ideas, and a practical plan.

Tarotop is a private space with Maevera, an AI familiar (灵宠). She stays with you in chat, keeps memory you control, and uses skills when they help — tarot is the first one. Free card of the day, 150 credits on signup, 10 languages.

Assetly is a free asset-management app for investors who want to know, every day: what your money did today, and why. US stocks, ETFs, and crypto all land on one screen, and Assetly writes a short portfolio brief for you three times a day — pre-market, midday, and after the close. Each brief breaks down what moved your portfolio, flags what is coming that could matter, and helps you think through your next move. You can read it or listen to it. You can also ask about your holdings in plain English. The AI Q&A answers questions about what you own — what changed, how positions are performing, and why — in simple language, no finance degree needed. Everything the AI generates is drawn from your actual holdings, and the briefs summarize what happened rather than predicting what will happen next. Assetly connects to US brokerages through SnapTrade, so your positions stay in sync. It is free to use. There is an iPhone app and a web app for Android users. Assetly launched on the App Store in September 2026 (v1.0, current v1.0.2) and is pre-revenue. I am the indie founder behind it, building from Austin, Texas. I would genuinely love feedback — try it out and tell me what is useful and what is missing.