Mobile Apps

One Two Sell runs on three platforms, and they are the same product rather than a full version and two companions:

Android requires Android 7.0 or newer. Both apps are free, and everything you can do on them is priced exactly as it is on web.

One account, three devices

Sign up on any platform and sign in on the others with the same phone number and password. There is nothing to migrate and nothing to link.

These all live on your account, not on a device, and appear everywhere within seconds:

• Your deals, showcases and tales.
• Your items and offers — the catalogue products you sell and the prices under them.
• Your messages, including group chats, read state and typing indicators.
• Your token balance, however you topped it up.
• Your profile, verification and company.
• Your followers, following, blocks and notification preferences.

Only two things are per-device: your theme (light/dark) and your sign-in session. Signing out of the app doesn't sign you out of the browser.

What's in the apps

Everything that matters is on all three platforms:

• Deals and Showcases — browse, filter, post, edit, boost.
• Items — the whole catalogue: Discover, search, filters, item pages, supplier offers, My Items, the offer editor, archiving and item requests.
• Tales — post and watch 24-hour tales.
• Messaging — one-to-one and group chats in real time, with voice messages, attachments, reactions and replies.
• Explore — the discovery surface, including hand-picked catalogue items.
• Verification, Private Lists, Tokens, Referrals and all of Settings.

What only the apps do

What only the web app does

Everything else — every feed, every form, every setting — is on all three.

Links open in the app

If you have the app installed and someone sends you a One Two Sell link, tapping it opens the app on that exact screen rather than the browser. This works through iOS Universal Links and Android App Links, and covers:

• Profiles — web.12sell.app/user/{slug}
• Deals and showcases — including a specific post from a notification
• Catalogue items — an item link opens the item page in the app, with its offers
• Private list invites and group chat invites

If you don't have the app, the same link opens the web page. Nothing is lost either way.

Notifications on mobile

Push is the main reason to have the app. See Notifications for the full list, but in short you'll be woken for:

• New messages and message reactions.
• Deals and showcases matching your interests.
• New offers on items you follow, and when someone quotes an item you sell.
• Verification progress, token events and announcements.

Tapping a notification opens the thing it's about, not the home screen.

Buying tokens on mobile

Tokens are the same balance everywhere, but the checkout differs by store rules:

• iPhone — Apple In-App Purchase, billed to your Apple ID.
• Android — Google Play Billing, billed to your Google account.
• Web — Stripe: cards, Apple Pay, Google Pay.

Buy on one and the tokens are immediately spendable on the others.

Keeping the app current

Both apps check their own version on launch. When a release fixes something that matters, you'll see an update prompt — usually optional, occasionally required if the old build can no longer talk to the platform safely. Tapping it opens your store.

Turn on automatic updates in your store if you'd rather never see the prompt. Each release's changes are listed on the App Store or Google Play listing, and anything significant also arrives as an announcement inside the app.

Common questions

Do I need the app, or is the web app enough?

The web app is complete — you can run your entire business from it. The apps add push notifications, the camera, and the fact that your phone is already in your hand when a buyer replies. Most active traders use both.

Can I be signed in on my phone and my laptop at once?

Yes, on as many devices as you like. Open Settings → Active Devices to see every session and end any you don't recognise.

If I post a deal on my phone, is it on the web too?

Immediately. There is one set of your content, served to whichever device you open.

Is Items on the apps?

Yes — the full catalogue, offers, My Items and the offer editor are on iPhone and Android as well as web. The only items feature still web-only is the CSV export and bulk price import.

Why does the app ask for my location?

For two things, both optional: setting your business address, and sharing your location in a chat when you choose to send one. Decline it and everything else works normally — you just type the address yourself.

I'm signed in on the app but the web app asks me to sign in again

Sessions are per-device by design. Sign in once in the browser and it stays signed in across 12sell.app, web.12sell.app and this documentation site.

Next steps

• Sign Up — create an account on any platform.
• Profile Setup — the guided setup that runs after sign-up.
• Items — the shared product catalogue, now on every platform.
• Settings — App Lock, notifications, devices and more.