Angelina's Lab
Free AI Tools
Small tools I've built to scratch my own itch. Free to use, no login required.
Build;AI
Two weekends. Five modules. One deployed AI system. A live mini-cohort where you run a real AI consulting engagement.
In partnership with AceTeam
Learn more →TL;IN
Drop in what you're reading, watching, or thinking about. Out comes a LinkedIn post in your voice.
Learn more →Carousel;IN
Turn your LinkedIn post into a swipeable carousel that looks like a magazine. Editorial typography, your brand.
Learn more →CRM;IN
Run your LinkedIn outreach like a CRM, not a spam bot. Personalize every message, track every follow-up, send each one yourself.
Experimental · BYOK
Learn more →TL;Listen
Turn articles and videos into audio briefings. Paste a link, get a podcast-style summary you can listen to on the go.
Learn more →Pomodoro Eye Care
A focus timer that forces you to rest your eyes. 25-min sessions with eye care exercises, ambient sounds, and browser notifications.
Learn more →Daily Brew
The morning digest you configure yourself. Write what you want to read in plain English and get an AI-curated brief on the topics you actually care about.
Powered by Yutori
Learn more →Which tool should I use?
Pick by the friction you're trying to solve.
I want to actually ship an AI system
Build;AI — a live two-weekend cohort with AceTeam where you run a complete AI consulting engagement on a mock client and deploy a real working system. $500 early cohort, waitlist open.
I need to post on LinkedIn
TL;IN — turns articles, videos, PDFs, and your notes into a draft in your voice. Free, BYOK (Anthropic), no auto-posting.
I want my LinkedIn post to swipe well
Carousel;IN. Turns the post you already wrote into a swipeable PDF carousel with editorial typography. Free, BYOK (Anthropic), your brand kit baked in.
I need to reach out to people without getting banned
CRM;IN. Run LinkedIn outreach like a CRM. Personalize every message, track every follow-up, send each one yourself. Free, BYOK (Anthropic), experimental.
I'd rather listen than read
TL;Listen — paste any article or YouTube link, get a podcast-style audio briefing. Free, BYOK (ElevenLabs for voice), plays in browser.
I can't stop staring at the screen
Pomodoro Eye Care — 25-min focus timer that forces eye-rest breaks with guided exercises. Free, no keys, no login.
My feed is garbage, I want curated news
Daily Brew — tell it what you care about in plain English, get an AI-curated morning digest. Free, powered by Yutori scouts.
Frequently asked questions
Are these tools really free?
Yes. Every tool in the lab is free to use, with no subscription or paywall. Most use a bring-your-own-key (BYOK) model, so you only pay the underlying API providers (such as Anthropic, ElevenLabs, or Yutori) for your own usage. Pomodoro Eye Care needs no keys at all. Because the BYOK tools spend on your own provider account, set a spending cap with your provider and keep an eye on your usage.
Do I need to sign up or create an account?
Most don't. TL;IN, Carousel;IN, TL;Listen, Pomodoro Eye Care, and Daily Brew need no account; open the link and you're in. CRM;IN is the exception: it uses a passwordless email sign-in (a magic link) so your outreach campaigns stay tied to you across sessions.
What does BYOK mean?
BYOK is short for "bring your own key." For the BYOK tools, you generate an API key from the underlying provider (Anthropic for Claude, ElevenLabs for voice, Yutori for scouts), paste it into the app, and it's stored locally in your browser, not on our servers. You pay the provider directly for your own usage, which is why we recommend setting a spending cap first.
What tech stack do the lab tools use?
The lab tools are browser-based web apps. TL;IN and Carousel;IN use Anthropic Claude. TL;Listen uses ElevenLabs for text-to-speech. Daily Brew uses Yutori scouts for curation. Pomodoro Eye Care is a zero-dependency timer with no AI at all. Most run entirely in your browser with no TwoSetAI backend. CRM;IN is the exception: it adds a passwordless sign-in and a small server step that looks up LinkedIn profiles using your key, which is never stored or logged.
Is my data stored on TwoSetAI servers?
For most tools, no. They store your API keys, inputs, and outputs locally in your browser, and send content directly to the underlying provider (Anthropic, ElevenLabs, or Yutori) using your own key. CRM;IN is the one tool with a light backend: it keeps a minimal sign-in session in a secure database, and routes profile lookups through a small server step using your key. Your key is never stored or logged, and your campaign data stays in your browser.
Which lab tool should I start with?
Start with the one that matches today's friction. Building a LinkedIn presence? TL;IN. Want your post to swipe well? Carousel;IN. Running outreach? CRM;IN. Drowning in articles and videos? TL;Listen. Screen-time eye strain? Pomodoro Eye Care. Want a better morning news habit? Daily Brew. They're independent, so use one or use them all.
Who builds these tools?
Angelina Yang, the sole operator of TwoSetAI and a fast.ai fellow. Each tool in the lab started as something she wanted for her own workflow or her audience and decided to share.
What kinds of tools are in Angelina's Lab?
A growing set, each solving a different daily friction: TL;IN turns articles, videos, and notes into LinkedIn posts in your voice, Carousel;IN turns a post into a swipeable PDF carousel, CRM;IN runs your LinkedIn outreach like a CRM with manual sending, TL;Listen turns articles and YouTube videos into podcast-style audio briefings, Pomodoro Eye Care is a focus timer with eye-rest exercises, and Daily Brew is a configurable AI morning digest you write in plain English. More are on the way.