!function(t,e){var o,n,p,r;e.__SV||(window.posthog && window.posthog.__loaded)||(window.posthog=e,e._i=[],e.init=function(i,s,a){function g(t,e){var o=e.split(".");2==o.length&&(t=t[o[0]],e=o[1]),t[e]=function(){t.push([e].concat(Array.prototype.slice.call(arguments,0)))}}(p=t.createElement("script")).type="text/javascript",p.crossOrigin="anonymous",p.async=!0,p.src=s.api_host.replace(".i.posthog.com","-assets.i.posthog.com")+"/static/array.js",(r=t.getElementsByTagName("script")[0]).parentNode.insertBefore(p,r);var u=e;for(void 0!==a?u=e[a]=[]:a="posthog",u.people=u.people||[],u.toString=function(t){var e="posthog";return"posthog"!==a&&(e+="."+a),t||(e+=" (stub)"),e},u.people.toString=function(){return u.toString(1)+".people (stub)"},o="init os ds Ie us vs ss ls capture calculateEventProperties register register_once register_for_session unregister unregister_for_session ws getFeatureFlag getFeatureFlagPayload getFeatureFlagResult isFeatureEnabled reloadFeatureFlags updateFlags updateEarlyAccessFeatureEnrollment getEarlyAccessFeatures on onFeatureFlags onSurveysLoaded onSessionId getSurveys getActiveMatchingSurveys renderSurvey displaySurvey cancelPendingSurvey canRenderSurvey canRenderSurveyAsync identify setPersonProperties group resetGroups setPersonPropertiesForFlags resetPersonPropertiesForFlags setGroupPropertiesForFlags resetGroupPropertiesForFlags reset get_distinct_id getGroups get_session_id get_session_replay_url alias set_config startSessionRecording stopSessionRecording sessionRecordingStarted captureException startExceptionAutocapture stopExceptionAutocapture loadToolbar get_property getSessionProperty bs ps createPersonProfile setInternalOrTestUser ys es $s opt_in_capturing opt_out_capturing has_opted_in_capturing has_opted_out_capturing get_explicit_consent_status is_capturing clear_opt_in_out_capturing cs debug M gs getPageViewId captureTraceFeedback captureTraceMetric Qr".split(" "),n=0;n<o.length;n++)g(u,o[n]);e._i.push([i,s,a])},e.__SV=1)}(document,window.posthog||[]);
  var h = window.location.hostname;
  if (forceAnalytics || h === 'buildy.so' || h === 'www.buildy.so') {
    posthog.init(posthogKey, { api_host: posthogHost, defaults: '2026-01-30' });
  }
})();</script><meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="icon" type="image/png" href="/favicon.png"> <link rel="apple-touch-icon" href="/apple-touch-icon.png"> <link rel="manifest" href="/manifest.webmanifest"> <link rel="canonical" href="https://buildy.so/"> <meta name="theme-color" content="#ffffff"><meta name="description" content="Chat apps disappear. Buildy apps stick around. Ask any AI to build an app; Buildy gives it a real URL and a database — and your AI can use it and update it."><meta property="og:type" content="website"><meta property="og:title" content="Buildy — Chat apps disappear, Buildy apps stick around."><meta property="og:description" content="Ask any AI to build an app. Buildy gives it a real URL and a database — and your AI can use it and update it, long after the chat is closed."><meta property="og:image" content="https://buildy.so/og-image.png"><meta property="og:image:width" content="1200"><meta property="og:image:height" content="630"><meta property="og:url" content="https://buildy.so/"><meta name="twitter:card" content="summary_large_image"><meta name="twitter:title" content="Buildy — Chat apps disappear, Buildy apps stick around."><meta name="twitter:description" content="Ask any AI to build an app. Buildy gives it a real URL and a database — and your AI can use it and update it, long after the chat is closed."><meta name="twitter:image" content="https://buildy.so/og-image.png"><title>Buildy — Chat apps disappear, Buildy apps stick around.</title><script type="application/ld+json">[{"@context":"https://schema.org","@type":"Organization","name":"Buildy","url":"https://buildy.so/","logo":"https://buildy.so/buildy-icon.png"},{"@context":"https://schema.org","@type":"WebSite","name":"Buildy","url":"https://buildy.so/"},{"@context":"https://schema.org","@type":"SoftwareApplication","name":"Buildy","url":"https://buildy.so/","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Chat apps disappear. Buildy apps stick around. Ask any AI to build an app; Buildy gives it a real URL and a database — and your AI can use it and update it.","installUrl":"https://chatgpt.com/apps/buildy/asdk_app_69f9215e800881919f3d96d79200a35a","sameAs":["https://chatgpt.com/apps/buildy/asdk_app_69f9215e800881919f3d96d79200a35a"],"offers":{"@type":"Offer","price":"0","priceCurrency":"USD"}}]</script><link rel="alternate" type="text/markdown" href="/index.md"><link rel="preconnect" href="https://fonts.googleapis.com"><link rel="preconnect" href="https://fonts.gstatic.com" crossorigin><link href="https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;0,8..60,700;1,8..60,400&family=IBM+Plex+Mono:wght@400;500&display=swap" rel="stylesheet"><link rel="stylesheet" href="/_astro/SiteFooter.CQawjzFX.css?dpl=dpl_8h4LuN2LCU5TFBJbwFVqSB3HofsS"></head> <body class="min-h-screen bg-paper text-ink antialiased" style="font-family: 'Source Serif 4', Georgia, serif;"> <div class="flex justify-center px-6 pt-6 sm:pt-8"> <a href="https://x.com/mrmagan_/status/2064379288917598394" target="_blank" rel="noopener noreferrer" data-cta="launch_post" data-cta-location="banner" aria-label="We just launched Buildy 1.0 — read the launch post" class="group inline-flex items-center gap-2 rounded-full border border-accent/30 bg-accent/10 py-1.5 pr-3 pl-3.5 font-mono text-xs tracking-wide text-accent transition hover:border-accent/60 hover:bg-accent/15"> <span class="inline-block h-1.5 w-1.5 rounded-full bg-accent" aria-hidden="true"></span> <span class="font-medium">We just launched Buildy 1.0</span> <span aria-hidden="true" class="font-semibold text-accent/70 transition-transform group-hover:translate-x-0.5">

→

buildy

Chat apps disappear. Buildy apps stick around.

Ask any AI to build it. Buildy gives it a real URL and a database — and your AI can use it and update it, long after the chat is closed.

Connect to ChatGPT

Copy Prompt

How it works

One app. Hosted by Buildy. Open anywhere.

Plain Technical

Your AI chatYour AI / agent

“A habit tracker with a streak.”

On it — building your app…

sends your app + datacreate_app({ module, ui, styles }) →

Buildy

hosts your app

saves your data

keeps it running

runs the hosted ES module

key-value store + backend ops

OAuth 2.1 + DCR · per-app tokens

→

Browser

a real link to open, pin & share

GET buildy.so/app/<slug> · public URL

Mobile

add it to your phone’s home screen

installable PWA · web manifest + SW

Any AI

open it inside ChatGPT, Claude & more

MCP connector · tools/list · 16 tools

◆ Your data lives in one place — every surface shows the same thing. ◆ One datastore — read/write via query_app · mutate_app · POST /app/<id>/api/<op> — from the UI, the API, or any connected agent.

Read the mechanics: start.md (routing) · llms-full.txt (module contract + every route) · openapi.json (machine-readable) · /docs

Starter apps you can customize.

Use one as-is, or ask AI to personalize it.

Hydration open demo →

5 / 8

Track water against a daily goal: progress ring, streak, and a 30-day heatgraph.

Meals open demo →

✓ Greek yogurt + berries 320 cal

✓ Chicken & rice bowl 540 cal

✓ Salmon + greens 610 cal

1,470 cal · 118g protein today

Log meals and macros by day. AI can fill in calories from your chat.

Flashcards open demo →

Front

être · to be

12 due · 65% known

Spaced-repetition decks. AI can fill them in bulk; the app schedules review.

Watchlist open demo →

Severance ★★★★★

Dune Part Two ★★★★★

The Bear S3 queued

Movies and shows you’ve seen and want to see, with your star ratings.

Split open demo →

Tacos$24

Margaritas$31

Chips & salsa$9

You’re owed $32.50

Split a bill: AI reads the receipt; you assign items; it does the math.

Lift open demo →

Bench 3×8 135 lb

Squat 5×5 225 lb

Deadlift 3×5 315 lb

Log lifts, sets, reps, and your weekly volume.

Build your first app.

Use the prompt with your favorite AI to create your first app.

Useful apps that stick around.

Real URLs

buildy.so/app/hydration

open share pin

Open, pin, share.

Saved data

habits 4

streak 14

updated today

Still there tomorrow.

AI-ready

16:04 Claude updated row #14

14:22 ChatGPT read habits.json

09:01 cron ran digest

AI can read and update it.

Yours to keep

ChatGPT · today habits 5/8

Claude · last week habits 5/8

same data, any chat

Every chat. Every agent.

On the roadmap →

Connect to APIs

soon

+24

Pull in weather, calendars, prices, and other live data.

Shared apps

soon

A M J +2

buildy.so/app/groceries

Use one app with other people, each with your own data.

Apps that talk

soon

trip planner budget shared context calendar notes

Let one app read and build on another’s data.

Version history

soon

v3 · current today

v2 restore

v1 restore

Undo a bad AI edit. Roll back to any point.

Install on your phone

soon

iOS

Android

offline-ready

Add apps to your home screen and use them offline.

Notifications

soon

push · Workout streak: day 14.

email · Weekly digest is ready.

sms · Pick up groceries.

Streak nudges, reminders, and badges from your apps.

Ready to build your first app?

Try it with ChatGPT in just a few minutes.

Connect to ChatGPT