# The backend for your phone app. Your iOS or Android app signs users in, including Sign in with Apple and Google, and keeps their data on Page Lemon. You build the app with your AI and publish it to the app stores yourself. Page: https://pagelemon.com/use-cases/mobile-app · For mobile apps · All use cases: https://pagelemon.com/use-cases/ Start: paste `Deploy on PageLemon.com` into your AI chat. ## From the idea to an app people sign in to The steps in the order they come. Start with whichever you’re at. 1. **The sign-in: Your phone app needs people to sign in** People sign in with Apple or Google, or with an emailed code. The same account works on your web app and your phone app. - You type: `Build my mobile app and run its backend on PageLemon.com: people sign in with Apple, and each sees their own orders` - Your AI: Done. Sign-in and an orders list are set up. - Later: "Let anyone sign up": Your AI changes the setting. - Later: "Show me the orders so far": Your AI reads them only if you allow it for that list. - Cost: Paid plan (for users signing in) - Example: the Cortado template (https://pagelemon.com/tp/Cortado) - Guide: https://pagelemon.com/use-cases/habit-tracker 2. **Their data: Each person sees their own things** Orders, entries and cards live in lists with rules: each user sees only their own, and you see everything in your Dashboard. - You type: `Add a stamp card: ten stamps earn a free coffee, and staff scan the QR to add one` - Your AI: Done. Each customer has a card, and staff add stamps by scanning. - Later: "How many cards were stamped today?": Your AI shows the counts. - Later: "Change it to eight stamps": Your AI changes the rule. - Cost: Paid plan (for users signing in) - Example: the Cortado template (https://pagelemon.com/tp/Cortado) - Guide: https://pagelemon.com/use-cases/cafe-loyalty 3. **Notifications and memberships: Tell people something, and charge for a plan** Your app can send notifications, within a monthly cap on your plan. Memberships bought in your app through the App Store or Google Play open the same plan, through RevenueCat. - You type: `Notify members when a class is full` - Your AI: Done. Members get a notification when the class fills. - Later: "Show me who is on the Gold plan": Your AI lists the members. - Later: "Pause notifications for tonight": Your AI changes the setting. - Cost: Paid plan (for notifications and memberships) - Example: the Mat template (https://pagelemon.com/tp/Mat) - Guide: https://pagelemon.com/use-cases/members-area ## What it replaces - Today: Sign-in written and secured for every app. With Page Lemon: Sign in with Apple and Google, and an emailed code, run for you. - Today: A server just to keep users’ data. With Page Lemon: Lists with rules, run by Page Lemon. - Today: A separate service for notifications. With Page Lemon: Notifications from the same place, within your plan’s cap. - Today: A web app and a phone app with two sign-ins. With Page Lemon: One account works on both. ## When Page Lemon isn’t for you - You want Page Lemon to publish your app to the App Store or Google Play. You build the app with your AI and publish it to the stores yourself; a Page Lemon web app opens in the phone’s browser and can be added to the home screen. - You want your own code running on Page Lemon servers. It doesn’t run customer code. - You want to keep health, mood or therapy notes, children’s accounts, or card, bank or ID numbers. Apps can’t hold these. ## What it costs you - Free: Build and try it as a test user; A small Page Lemon badge. - Paid plan: Users signed in to your app; Notifications, within a monthly cap; Your own domain, and no badge. Not for you? Full refund within 14 days, no questions asked. - Pricing: https://pagelemon.com/pricing ## Templates to start from - Cortado: Station café app: a departures board for your order, a red platform sign and a paper stamp card with red ink stamps (https://pagelemon.com/tp/Cortado; preview https://pagelemon.com/tp/Cortado) - Mat: Sand-to-lilac wash with arched windows that fill with dawn or evening light, in olive and clay (https://pagelemon.com/tp/Mat; preview https://pagelemon.com/tp/Mat) - Walkies: Sky over field green: walks as a drawn park map with a tennis-ball route, dogs in collar tags (https://pagelemon.com/tp/Walkies; preview https://pagelemon.com/tp/Walkies) - Rep: Gym whiteboard on steel: chalk boards, a yellow primary and plate colours, with a drawn barbell and condensed type (https://pagelemon.com/tp/Rep; preview https://pagelemon.com/tp/Rep) - Toast: Stationery suite on linen: ink navy and dusty rose, an envelope with a pressed-flower liner and a pen-ticked reply card (https://pagelemon.com/tp/Toast; preview https://pagelemon.com/tp/Toast) - Casebook: Manila accordion file with index tabs, tear-off deadline pages and red-ink stamps on typed slips (https://pagelemon.com/tp/Casebook; preview https://pagelemon.com/tp/Casebook) More: https://pagelemon.com/templates/#apps ## Step-by-step guides - [Habit and goal tracker](https://pagelemon.com/use-cases/habit-tracker) (Markdown: https://pagelemon.com/use-cases/habit-tracker.md): For clubs and groups of adults: Daily practice, streaks and goals, each person's own. Cost: Paid plan. - [Café loyalty card with AI](https://pagelemon.com/use-cases/cafe-loyalty) (Markdown: https://pagelemon.com/use-cases/cafe-loyalty.md): For cafés, bakeries and small shops: Stamps scanned at the counter, questions answered by AI. Cost: Paid plan. - [Members’ area or course](https://pagelemon.com/use-cases/members-area) (Markdown: https://pagelemon.com/use-cases/members-area.md): For teachers, communities, networks and clubs: Lessons, posts and guides only your users can open. Cost: Paid plan. - [Expense app](https://pagelemon.com/use-cases/expense-app) (Markdown: https://pagelemon.com/use-cases/expense-app.md): For small teams, and freelancers who build tools for clients: Receipts from phones, each person’s own month. Cost: Paid plan. ## Questions **Does Page Lemon publish my app to the stores?** No. Your AI helps you build it, and you publish it to the App Store and Google Play yourself, from your own developer accounts. **Can people sign in with Apple?** Yes: Sign in with Apple and Google in a phone app, and an emailed code on the web. See [the API docs](https://pagelemon.com/docs/api). **Can I sell memberships in the app?** Yes. App Store and Google Play purchases open the same membership, through RevenueCat. See [selling subscriptions in your app](https://pagelemon.com/docs/app-subscriptions). **Do my users need a Page Lemon account?** No. They sign in on your app. **How many users can I have?** It depends on your plan: see [pricing](https://pagelemon.com/pricing).