How Retail Businesses Are Using Apps to Increase Repeat Purchases

For many retailers, winning a first sale is the expensive part.

Advertising costs, marketplace fees and discounts all eat into the margin on that first order. The profit usually comes later, when the same customer returns again and again. That is why more retail businesses, from national chains to independent shops, are using mobile apps not as a nice extra, but as a tool built specifically to bring customers back.

A well-designed retail app increases repeat purchases in a handful of consistent ways. It makes loyalty visible and rewarding, with points, perks and progress always in the customer's pocket. It removes friction from buying again, through saved details, quick reordering and fast checkout. It personalises what each customer sees, based on what they have bought and browsed. It gives the retailer a direct, low-cost channel to remind and inform customers through notifications. And it connects online and in-store shopping, so the app becomes useful whether the customer is on the sofa or in the aisle.

None of this works automatically. Many retail apps are downloaded, opened once and forgotten. This guide explains the features and practices that genuinely drive repeat purchases, with examples from retailers that have used apps well, how to measure whether your app is working and how to decide whether an app is the right investment for your business at all.

Why repeat purchases matter, and why apps help

The economics of retail favour customers who come back. Acquiring a new customer typically means paying for their attention through advertising, search, social media or marketplaces, often before they have spent anything. A returning customer is already familiar with your products, trusts your service and costs far less to reach. Research associated with Frederick Reichheld of Bain & Company, widely cited for decades, found that relatively small improvements in customer retention could lead to large increases in profit, because loyal customers tend to buy more over time, cost less to serve and refer others.

Why an app rather than just a website?

A mobile website can do much of what an app does, and for many retailers it remains the main channel. But apps have several advantages for encouraging repeat purchases.

An app icon on someone's phone is a constant, low-cost reminder of your brand. Customers who install an app are usually among your most engaged, so the app concentrates effort on the people most likely to buy again. Apps keep customers logged in, with saved payment details, addresses and preferences, which makes repeat purchases faster. They allow push notifications, a direct channel that does not depend on email inboxes, social media algorithms or paid advertising. They can use device features such as the camera for scanning products, location for store-specific information and digital wallets for loyalty cards. And they let retailers build experiences that work across online and physical stores in ways a website struggles to match.

The catch

The same features that make apps powerful also make them demanding. Customers only install and keep apps that give them clear, repeated value. An app that is little more than a copy of the website, with nothing extra to offer, is unlikely to earn space on someone's phone. The rest of this guide focuses on the features that provide that value.

Loyalty and rewards built into the app

Loyalty programmes have existed for decades, but apps change how they work. Instead of a plastic card or a stamp sheet, customers can see their points, progress and rewards at any time, earn them automatically and redeem them with a tap.

Learning from established programmes

Starbucks is one of the most frequently cited examples. Its Starbucks Rewards programme is built into its app alongside mobile ordering and payment, and the company has reported in its financial results that rewards members account for a large share of its US company-operated sales. The app combines several drivers of repeat purchase in one place: stars earned on every order, personalised offers, saved payment and the ability to order ahead and skip the queue.

Other retailers have built similar programmes into their apps, from beauty retailers such as Sephora, with its Beauty Insider tiers, to supermarkets such as Tesco, whose Clubcard app provides member prices and personalised vouchers. The details differ, but the principle is the same: make being a loyal customer visibly worthwhile.

Designing rewards that change behaviour

The most effective app-based loyalty programmes share a few characteristics. Rewards are easy to understand: customers should know quickly how they earn and what they get. Progress is visible, because showing how close someone is to the next reward encourages another purchase. Early wins matter, so a welcome reward or a quick first milestone helps new members experience value before they lose interest. Benefits go beyond discounts, too. Free delivery, early access to sales or new products, members-only events, birthday rewards and services such as free alterations or extended returns can build loyalty without eroding margin as much as constant discounting.

Tiered programmes, where customers unlock better benefits as they spend more, can motivate higher-value customers, provided the tiers feel achievable rather than out of reach.

Keep it simple and honest

Complicated rules, points that expire quietly or rewards that are hard to redeem frustrate customers and undermine trust. Be clear about how the programme works, how long points last and any conditions, and make redemption as easy as earning. A loyalty card that can also be added to Apple Wallet or Google Wallet makes it easier for customers to use in-store, even when they do not open the app.

Making it effortless to buy again

One of the simplest ways an app increases repeat purchases is by removing effort. Every extra step between wanting something and buying it gives the customer a chance to put it off, get distracted or buy elsewhere.

Stay logged in, remember everything

Apps can keep customers signed in securely, with saved delivery addresses, preferred payment methods and size or product preferences. Support for mobile wallets such as Apple Pay and Google Pay, and for biometric confirmation such as Face ID or fingerprint, can reduce checkout to a few taps. For physical goods, Apple's and Google's app store rules generally allow retailers to use their own payment processing rather than the stores' in-app purchase systems, so retail apps are not usually subject to the commissions that apply to digital goods, although it is worth checking the current guidelines for your situation.

Reorder and replenish

For products people buy regularly, such as groceries, coffee, pet food, toiletries, supplements or printer ink, features such as "buy it again", saved lists and one-tap reorder of a previous basket save time and make the app the easiest way to restock. Some retailers go further with subscriptions or scheduled deliveries, where customers choose how often they want products sent. Subscriptions turn occasional repeat purchases into predictable ones, but they must be easy to pause, change and cancel. Consumer protection rules in many markets, including the UK's Digital Markets, Competition and Consumers Act 2024 and various US state automatic renewal laws, set requirements for clear terms and straightforward cancellation.

Order ahead and skip the queue

For food, drink and quick-service retail, ordering ahead through the app and collecting without waiting is a powerful reason to keep using it. The same idea applies to click and collect for general retail, where customers order in the app and pick up in-store.

Make wishlists and back-in-stock alerts work for you

Wishlists and saved items are signals of future intent. Notifying customers when a saved item comes back in stock, drops in price or is running low turns a passive list into a reason to return.

Keep performance high

Speed matters. A slow, crash-prone app undermines every convenience feature. Fast start-up, quick search and a reliable checkout are basic requirements for an app that people will keep using.

Personalisation and recommendations

Because app users are usually logged in, retailers can build a much richer picture of their preferences than they can from anonymous website visits. Used well, that knowledge makes the app more useful each time a customer opens it.

What personalisation looks like in practice

Common approaches include a personalised home screen that highlights categories, brands or products related to what the customer has bought or browsed; recommendations such as "customers who bought this also bought" or "complete the look"; offers and rewards tailored to a customer's buying patterns rather than blanket discounts; and remembering preferences such as size, dietary requirements, favourite store or preferred brands so they are applied automatically.

Research from McKinsey in 2021 found that most consumers said they expect personalised interactions from the companies they buy from and become frustrated when they do not get them. In retail, the practical effect is simple: when the products a customer sees are more relevant, they are more likely to find something they want and come back.

Start simple

Personalisation does not have to begin with complex machine learning. Simple rules can be very effective: showing recently viewed items, reminding customers of products they buy regularly, highlighting new arrivals in categories they have bought before or tailoring offers by store location. Many e-commerce platforms and app development frameworks include recommendation features or integrate with recommendation services. As data and traffic grow, more advanced models can refine recommendations further.

Respect privacy and choice

Personalisation depends on personal data, so it must be handled lawfully and transparently. Under the UK GDPR and EU GDPR, retailers need a lawful basis for processing customer data, clear privacy information and, in many cases, consent for marketing and certain types of tracking. On iOS, Apple's App Tracking Transparency framework, introduced in 2021, requires permission before tracking users across other companies' apps and websites, although it does not prevent a retailer from personalising based on activity within its own app. Personalisation should feel helpful, not intrusive: using sensitive inferences, or showing that you know more than customers expect, can damage trust.

Notifications and messages that bring people back

Push notifications are one of the main reasons retailers invest in apps. They provide a direct line to customers' phones without paying for each message or depending on email inboxes and social media algorithms. They are also easy to misuse, and customers who feel bombarded will turn them off or delete the app.

Earn permission first

Both major platforms now require apps to ask before sending notifications: iOS has done so for years, and Android introduced a runtime notification permission with Android 13 in 2022. That makes the moment of asking important. Rather than requesting permission the first time the app opens, explain the benefit first, for example "Get notified when your order is ready or when items on your wishlist drop in price", and ask when the value is obvious, such as after a first order.

Send messages people actually want

The notifications that drive repeat purchases without causing irritation tend to fall into a few categories. Transactional updates, such as order confirmations, dispatch notices, delivery updates and collection reminders, are almost always welcome and build trust. Personal triggers, such as a back-in-stock alert, a price drop on a saved item or a reminder that a regular purchase might be running low, are highly relevant because they are based on the customer's own actions. Loyalty updates, such as points earned, a reward available or a tier reached, reinforce the value of the programme. Selective promotions, such as a sale in a category the customer buys from, can work when they are relevant and not too frequent.

Broadcast promotions sent to everyone, several times a week, are the quickest way to lose permission.

Timing, frequency and control

Respect time zones and sensible hours, set limits on how many promotional messages any customer receives in a week, and use behaviour to time messages, for example sending a replenishment reminder based on how often a customer usually reorders. Give customers clear controls in the app so they can choose which types of notification they receive, rather than forcing an all-or-nothing choice.

Beyond push

In-app messages, shown while a customer is using the app, are useful for highlighting new features, rewards or offers without interrupting them elsewhere. Email and SMS still play a role, especially for customers who have not installed the app or have turned off notifications. Coordinating channels avoids sending the same message three different ways. For marketing messages by email and SMS, check consent requirements, such as the UK's Privacy and Electronic Communications Regulations.

Connecting the app with physical stores

For retailers with shops, one of the strongest reasons for customers to keep an app is that it makes in-store visits easier. Connecting online and physical shopping turns the app from an occasional online shop into something customers use every time they shop with you.

Useful in-store features

Store stock and location. Showing whether an item is in stock at a nearby store, and in some cases where to find it in the store, saves wasted trips and encourages visits. Click and collect. Ordering in the app and collecting in store, sometimes within hours, combines online convenience with immediate access. In-store mode. Some retail apps switch to a store-specific view when customers are in or near a shop, showing local offers, stock and services. Scan to learn or scan to pay. Scanning a product barcode in store to see reviews, sizes, colours or prices, or using scan-and-go features that let customers scan items as they shop and pay on their phone, removes queues. Warehouse club Sam's Club, owned by Walmart, is one of the retailers known for offering a Scan & Go feature in its app. Digital loyalty and receipts. Loyalty cards in the app or in a phone wallet, plus digital receipts, mean customers are recognised and rewarded on every visit, and purchase histories are complete across channels.

One customer, one record

To make these features work, the app, website and store systems need to share data: stock levels, prices, orders, loyalty balances and purchase history. That usually means integrating the app with point-of-sale, inventory, e-commerce and CRM systems. It is often the most complex part of building a retail app, but it is also what makes the experience feel seamless rather than disjointed.

Staff can help adoption

Store staff are often the best people to encourage app downloads, for example by showing customers how to check stock, collect points or skip the queue. A small incentive, such as a welcome reward on first use in-store, combined with genuine usefulness, can build adoption steadily.

Measuring repeat purchase performance

An app should earn its place through measurable results. That means tracking not just downloads, but whether app users buy again, buy more often and stay longer.

The measures that matter

Repeat purchase rate is the share of customers who buy more than once within a given period. Purchase frequency shows how often customers buy, and time between purchases shows whether that gap is shrinking. Average order value reveals whether customers spend more per visit. Customer lifetime value estimates the total revenue or profit a customer generates over their relationship with you, which is ultimately what repeat purchase strategies aim to increase.

For the app itself, track active users over time, cohort retention, meaning how many customers who installed in a given month are still using the app weeks or months later, notification opt-in rates and loyalty engagement, such as how many members earn and redeem rewards. Retention curves that flatten rather than falling towards zero are a sign that the app is delivering lasting value.

Beware the self-selection trap

It is tempting to compare app users with non-app users and conclude that the app causes higher spending. But customers who install a retailer's app are usually more loyal to begin with, so the comparison overstates the app's effect. More reliable approaches include comparing the same customers' behaviour before and after they adopt the app, comparing similar customers who were and were not offered an app incentive, and using holdout groups, small groups of customers who deliberately do not receive a particular feature, notification or offer, to measure its true impact.

Measure the full picture

Repeat purchases driven by heavy discounting may not be profitable. Track margins, discount costs and loyalty programme costs alongside sales, and look at whether app customers keep buying when promotions end. Also monitor the cost of building and maintaining the app, which is an ongoing investment rather than a one-off cost.

When an app makes sense, and when it does not

Not every retailer needs an app. Building and maintaining one is a significant, ongoing investment, and an app that few customers install or use is an expensive way to send notifications.

Apps tend to work well when

Customers buy frequently, such as groceries, coffee, convenience goods, pet supplies, beauty products or everyday fashion, so there are many chances to bring them back. A loyalty programme already exists or is planned, and the app can make it more useful. The business has physical stores and can use the app to connect online and in-store shopping. The customer base is large enough that even a fraction of customers installing the app represents meaningful revenue. And the retailer can offer clear reasons to install, such as exclusive rewards, faster ordering, order-ahead or features unavailable elsewhere.

A website may be enough when

Purchases are infrequent, such as furniture, appliances or wedding dresses, so customers have little reason to keep an app installed. The customer base is small or highly occasional. Or the business does not have the resources to maintain an app, run a loyalty programme and manage notifications properly.

Middle-ground options

A well-built mobile website with saved accounts, fast checkout and email marketing can achieve much of what an app does for many retailers. Progressive web apps, websites that can be added to a phone's home screen and work more like apps, offer some app-like features without app store distribution, although their capabilities, particularly on iOS, are more limited. Digital loyalty cards in Apple Wallet or Google Wallet can bring some of the benefits of an app-based loyalty scheme without a full app. Many e-commerce platforms also offer app builders that let smaller retailers launch a branded app based on their existing online store.

The right choice depends on purchase frequency, customer numbers, store presence and the resources available to run the app well over time.

Common mistakes

Building a copy of the website. An app that offers nothing beyond the mobile site gives customers no reason to install or keep it. Focus on features that add value: rewards, faster reordering, order-ahead, in-store tools and personalised alerts.

Asking for notification permission too early. Requesting permission the moment the app opens, before customers understand the benefit, leads to more refusals. Explain the value first and ask at a relevant moment.

Over-messaging. Frequent, generic promotional notifications quickly lead customers to turn them off or uninstall the app. Prioritise relevant, personal and transactional messages, and cap promotional frequency.

Relying on discounts alone. Constant discounting trains customers to wait for offers and erodes margins. Combine rewards with convenience, service and exclusive experiences.

Disconnected systems. An app that shows different prices, stock levels or loyalty balances from the website or store creates frustration. Integrate the app with e-commerce, point-of-sale, inventory and CRM systems.

Making cancellation or unsubscribing difficult. Hard-to-cancel subscriptions or hidden opt-outs damage trust and increasingly conflict with consumer protection rules.

Measuring downloads instead of loyalty. Downloads say little about value. Track repeat purchase rate, purchase frequency, retention and customer lifetime value, and compare fairly.

Underinvesting after launch. Retail apps need regular updates, new features, operating system compatibility work and performance improvements. An app that is not maintained quickly loses users.

If you are considering a retail app, or wondering why an existing one is not driving repeat business, it is worth starting with how your customers buy, how often they return and what would genuinely make their next purchase easier. An experienced mobile app development partner can help define the right features, integrate the app with your store and e-commerce systems, and set up the analytics needed to measure its real impact on repeat purchases.