Chrome Extension · {{EXT_VERSION}}

Type once.
Use it everywhere.

Snippets, formulas, and prompts that expand wherever you type. One library, synced across Chrome and mobile.

Stress the model, not yourself.

No credit card required Works in Gmail, Notion & Slack Set up in 2 minutes
Add to Chrome Open mobile app
mail.google.com
You type
::quoteEN
↓
SprintBrain writes
Dear guest, Thank you for your interest. The total for 3 nights is €450 (€150/night x 3), with the 10% early-bird discount applied. Best regards, LeibTour Team
Trusted by operators at
What's inside

Everything text expansion should be. Plus the two things it isn't.

A drop-in replacement for TextBlaze, TextExpander, and Magical, with live formulas and a reusable prompt library on top.

01 · Triggers

Type a short tag. Watch a full template appear.

::quoteEN expands into a 200-word multilingual quote. Works in Gmail, Notion, Slack, your CRM. Anywhere you can type.

02 · Formulas

Real math, inline.

Totals, discounts, fees, net prices: calculated the instant a template expands. CSP-safe parser, no eval.

03 · Prompts

A library of reusable prompts.

One-shot and few-shot prompts for ChatGPT, Claude, and any model, stored next to your templates, expanded the same way.

04 · Cloud sync

Every device, under a second.

Backed by Supabase. Edit on your laptop, paste on your phone, propagated in < 1 s, encrypted at rest, no conflicts.

05 · Notion sync

Edit where your team already works.

Mirror a Notion database as your library, one-way or two-way. Reviewers comment in Notion; expansions update in the extension within the minute.

06 · Mobile

Your library, on any phone.

Browse, search, and copy from iOS and Android. No laptop required. Same library, same shortcuts, same formulas.

07 · Team folders

Share a folder. Your team types from it.

Share a folder with the whole team or specific teammates, at View, Edit, or Owner access. Every snippet, formula, and prompt inside it shows up in their dashboard and extension the moment you share.

No app to download

One account.
Three surfaces.

SprintBrain ships as a Chrome extension, a web dashboard, and a mobile website. Sign in once. Your snippets and formulas are everywhere, instantly.

Chrome Extension

One-click install from the Chrome Web Store. The popup puts every snippet at your fingertips while you type, in Gmail, Slack, Notion, your CRM, anywhere.

Ready to install

Web Dashboard

Manage your full library from any browser. Create folders, write snippets with live formulas, share folders with your team, review analytics, and configure Notion sync. Nothing to install.

Lives in your browser

Mobile Website

Browse, search, and copy snippets on iOS or Android, straight from Safari or Chrome. No download, no app store. Just open a URL and you're in.

No download required

One account  ·  Three surfaces  ·  Always in sync

Partner Stories

Where SprintBrain runs every day.

Real hospitality operators delivering faster guest communications and sharper pricing, without switching tools.

LeibTour
Vacation Rental Operator

Ibiza's destination management company, handling vacation rentals and hospitality services since 2005. Guest communications go out in three languages, every day, without switching apps: pricing quotes, check-in details, follow-ups.

Key use case Multilingual guest communications in EN, ES & IT. Expanded in under a second.
leibtour.com
Locoprice
B2B Travel Platform

A professional B2B travel network giving agents access to exclusive, wholesale hotel rates unavailable on public OTAs. SprintBrain handles the high volume of quote requests and booking confirmations, consistently branded, every time.

Key use case Pricing quotes with live formula calculations. Zero manual recalculation.
locoprice.com

Type once.
Use it everywhere.