Loyalty app development: how to build a rewards app that personalizes offers

Loyalty app development means building the app where customers collect and spend rewards, and building or connecting the system that counts points and picks offers. A branded app on your loyalty platform, with its own small backend, starts from $5,000. A custom system with its own points records, an admin panel, and a connection to your point-of-sale (POS) system or online store starts from $10,000. Both prices include design and project management.

This guide is for retailers, restaurant chains, and product owners who plan a loyalty app and want to know what the work involves before they request quotes. For the app itself, see our cross-platform app development service.

What a loyalty app does

A loyalty app gives a customer a reason to buy from you again and gives you a record of what they buy. Each group that uses it needs its own part of the system.

Loyalty program models

The model decides what the backend must count and when a customer sees value. Choose one main model for the launch. A second model can come later, such as tiers on top of points.

Before any design, decide what a point is worth in money and how much of each purchase you give back. This is a finance decision, and every screen, rule, and report depends on it.

Buy a loyalty platform or build your own app

Buy when a standard program fits and you sell mostly through one store platform. Build when the program is part of what makes your business different, or when it must work the same way in your stores, your online store, and your app. Between the two sits a middle path: a branded app on top of a platform's API.

Some loyalty platforms are cheap to start with, and their plans grow with order volume. For example, Smile.io, a loyalty app for Shopify stores, has a free plan for 200 monthly orders, and API access comes with its Plus plan at $999 per month on annual billing. Open Loyalty sells an API-first loyalty engine to enterprise brands, which fits the middle path.

“Before you choose a platform, ask what you can take with you if you leave. If the answer is only the member list and the balances, the purchase history that personal offers depend on stays with the platform. For a simple program, that can be fine. For a program you plan to personalize, where that history stays decides who can build the next offer.”

Roman Surikov, CEO at Ronas IT

Loyalty app features

The customer app should answer two questions as soon as it opens: how many points do I have, and what do I get next.

Customer app

• Sign-up in under a minute: phone number or email, sign-in with Apple or Google, and an option to join from the receipt or a QR code in the store.
• Member code: a barcode or QR code that the cashier scans, which also works without a network connection.
• Balance and history: points, tier, what each purchase earned, and when points expire.
• Rewards and offers: a catalog of rewards and personal offers that the customer can activate before shopping.
• Notifications: push messages about a new offer, a reward that is ready, or points that are about to expire.
• Preferences: favorite categories, sizes, or stores, and a switch to turn off personal offers.

Admin panel for the marketing team

• Rules: earning rates, bonus days, tiers, and rewards, changed without a new app release.
• Segments and campaigns: groups such as customers who have not bought in 60 days, with an offer and a schedule for each group.
• Customer support: a customer's history, with manual corrections that are recorded and need a reason.
• Reports: members, points given and used, and sales from offers.

Rewards features we have built

The projects below are not retail loyalty apps. We built rewards features inside other products, and each project shows one part of the work.

• Discount and promo codes: in Noah, a marketplace we built for a Swedish client to connect local farmers with buyers, farmers could set their own prices and discount codes in their app, and managers ran promo codes and gift cards from the web admin panel.
• Cashback from partners: in a US neobank app we built for a client, customers earned cashback on purchases from online and offline partners listed in the app, through an integration with Kard, a rewards platform.
• Points, levels, and a leaderboard: in Waku Waku, an anime community app we built for a client, users earned points for reviews, ratings, and discussions, leveled up their accounts, and competed on a leaderboard. Subscribers earned points faster.

What carries over to a retail program with a POS in the stores is the backend work: reward rules, discount and promo codes, and an admin panel for the people who run the program.

How personalization works in a loyalty app

Personalization in a loyalty app means each customer sees offers and rewards that fit what they buy. It runs on three kinds of data: purchases from the POS and the online store, activity in the app, and what customers tell you about themselves. Start with simple rules, and add recommendations with AI when you have enough purchase history.

Start with rules

Rules are easy to explain and easy to check. A customer who has not bought in 60 days gets a return offer. A customer close to the next tier sees how much is left. Points that expire next month trigger a reminder. The marketing team sets these rules in the admin panel, and the backend applies them to each customer every day.

Add recommendations when the data is there

With enough purchases, a recommendation model can pick the product or the offer each customer is most likely to use. Our guide to e-commerce recommendation engines explains how such models work. In Waku Waku, recommendations used a different signal than purchases: the reviews users left and the discussions they joined.

Let customers correct it

Personal offers go wrong when the system keeps offering what someone bought once as a gift. Give customers a preferences screen, a way to hide an offer, and a switch for personal offers.

Measure the real effect

Keep a small random group of members who get no personal offers, and compare their purchases with everyone else's. Without that group, it is hard to tell whether an offer brought a sale or rewarded a purchase that would have happened anyway.

Privacy rules for loyalty data

A loyalty program collects personal data in exchange for rewards, and privacy laws cover exactly that. The rules below affect the app itself: what it shows before sign-up, and the choices it gives customers.

• California: the state's privacy regulations define a financial incentive as “a program, benefit, or other offering, including payments to consumers, for the collection, retention, sale, or sharing of personal information.” Under section 1798.125 of the California Civil Code, a business the law covers can enroll a customer in such a program only with the customer's prior opt-in consent. The Notice of Financial Incentive must be available where customers see it before they opt in. It explains the terms, how to join, and how to withdraw. For a price or service difference, it also explains how the difference is reasonably related to the value of the customer's data, with a good-faith estimate of that value and the method used to calculate it.
• European Union: under Article 21 of the GDPR, a person can object at any time to the use of their data for direct marketing, including profiling related to it. After an objection, the data can no longer be used for that marketing.

In the app, this means a clear notice before sign-up, a way to object to marketing, and a backend that stops using a customer's data for marketing after an objection. Which laws apply depends on where your customers live and on details of your business, so ask a privacy lawyer before launch.

The points ledger and fraud

Points are a kind of money, so the backend must count them like money. It records every change of points as a separate entry: earned for a purchase, spent on a reward, taken back after a return, or expired. The balance is the sum of those entries, and support can always explain where each point came from.

• One purchase, one entry: the POS or the store can send the same purchase twice, for example after a network error. Each purchase carries its own ID, and the backend gives points for it only once.
• Returns: a returned item takes back the points it earned. If the customer has already spent them, the rule for a negative balance must exist before launch.
• Expiry: points that expire leave the balance as their own entry, and the app warns the customer in advance.
• Manual corrections: support can add or remove points only with a reason, and the admin panel records who did it.

“The first time a customer says their points disappeared, you learn whether you built a ledger or just a number in a table. With a single number, nobody can prove anything, and the business pays the points back to end the argument.”

Alexander Storozhevsky, Lead developer at Ronas IT

Rewards attract fraud, such as fake accounts that collect sign-up bonuses, referral rewards between accounts of one person, and stolen accounts whose points are spent on gift cards. Give referral rewards only after the friend's first confirmed purchase, limit bonuses per device and payment card, and check suspicious sign-ups and logins. On several projects, we have added IP checking services to the backend to investigate suspicious traffic and logins.

Integrations: POS, online store, and wallet cards

A loyalty app depends on its connections, because points come from purchases made in other systems. List every system that sees a purchase or a customer, and before the design work starts, get API documentation and a test account from each vendor.

• POS in the stores: the connection sends each purchase with the member's ID and receives the discount of a reward at checkout. Connecting an older POS without an API costs more.
• Online store: the store and the app share one customer account, so points earned online and in the store end up in one balance.
• CRM and email: segments and offers go to the tools the marketing team already uses.
• Wallet cards: Apple Wallet supports store cards, and the Google Wallet API lets customers add loyalty cards to Google Wallet. When the balance changes, Apple's flow has your server send a push notification, and the device then downloads the updated card.

Our backend standard applies to these connections too: tests never call real vendor APIs and use stand-ins for the POS and the store instead. A vendor can change its interface or go down, and that should not block a release of your app.

Tech stack for a loyalty app

For a custom loyalty system, we would use this stack.

• Customer app: React Native with Expo, one codebase for iOS and Android.
• Admin panel: Laravel Backpack by default, with Laravel Nova as the alternative.
• Backend: Laravel with PostgreSQL for the ledger, and Redis for queues and caching.
• Push notifications: Expo Notifications, with FCM for Android and APNs for iOS.
• Live updates: Laravel Reverb, so the balance on the screen changes while the customer stands at the checkout. This real-time feature raises the starting price of a custom system from $10,000 to $20,000.
• Error tracking: Sentry, so a failed points update reaches the team before a customer does.

How much does loyalty app development cost?

A custom loyalty system starts from $10,000 for one cross-platform app with the backend, the admin panel, and the integrations with your POS or online store. A branded app on a loyalty platform starts from $5,000, and that price covers the small backend it needs of its own. The platform's API keys must not live in the app, so the backend holds them, calls the platform, and sends push notifications.

When the program needs real-time features such as live balance updates, or has to handle high load, the custom system starts from $20,000 instead of $10,000 and takes at least 8 weeks instead of 5. The total also grows with every model you add, with an older POS that has no API, and with each sales channel that must share the balance.

Every development price includes design, project management, and testing. A web app for members next to the mobile app is a second platform and adds from half the price of the first.

How to build a loyalty app

Work in this order: settle the program and its money before any design, connect to real purchase data early, and test in one store before the full launch.

1. Set the program and its economics. The business owner and finance choose the model, what a point is worth, how much of each purchase goes back to the customer, and when points expire.
2. Choose buy, build, or the middle path. The product owner compares a loyalty platform, a branded app on its API, and a custom system against the rules the program needs.
3. Get access to the systems. Your team asks the POS vendor, the store platform, and the CRM for API documentation and test accounts.
4. Map the flows and the ledger rules. The product team writes the flows for the customer, the cashier, and the marketing team, and the rules for returns and expiry. Only if the scope is not written yet, our optional analysis phase turns them into a written scope and an estimate.
5. Design the balance and the rewards. The designers build the home screen, the member code, the rewards catalog, and the admin panel around the program's rules.
6. Build in sprints you can check. The development team splits the work into sprints, usually one to three weeks long. Each sprint gives you something to open and try: screens ready for testing, an update on the dev server, or new mockups.
7. Pilot in one store. Cashiers and a group of real customers use the program in one store before the wider launch, because scanning at a busy checkout finds problems that tests miss.
8. Launch, then add personalization. The apps go to the App Store and Google Play. Once the data starts to show buying patterns, the marketing team adds rules, and later recommendations.

What to do next

Before you request quotes, you can start steps 1 to 3 on your own. Then make two decisions that shape the estimate.

1. Choose the sales channels for the launch. Decide whether the app, your stores, and your online store must share one balance from the first day. Several channels on one balance point to a custom system, and each POS or online store on that balance needs its own connection.
2. Check if you need live balance updates. With them, a customer sees the new balance while still at the checkout. This real-time feature moves the backend and its admin panel to the higher starting price and the longer timeline.

Your budget then has two parts. The first is a one-time build cost from the cost table rows for your path and your connections, with project management already inside. The second is a monthly cost after launch: support for the app with its backend and admin panel from $1,000 per month, or from $2,000 per month once a web app for members joins it. With the path, the channels, and the live updates decided, the estimate is built around your program and your systems, and the first version can launch in one store with one model before it grows.

Tell us your program model, the POS and store platform you use, and how many stores you run, and we will come back with a rough estimate.

Get an estimate