Push notifications vs SMS vs email for customer retention

Three channels, three jobs

Once customers join your loyalty programme, you can reach them in more than one way. Each channel has strengths, and the best programmes use each for the job it does best rather than broadcasting everything everywhere.

Wallet push notifications

A wallet push comes from the loyalty card in the customer’s phone wallet, so there is no app to install. It appears on the lock screen like other notifications. It is ideal for short, relevant messages: “Your points balance is £4.20, enough for a free flat white” or “Double points this Thursday”.

Because pushes are cheap to send, the temptation is to overuse them. Don’t. Customers can switch off notifications for the card or remove it altogether. One or two good messages a month beat ten forgettable ones.

SMS

Text messages are read quickly and feel personal, which makes them powerful and easy to abuse. Keep SMS for messages where timing matters: a same-day offer to fill a quiet afternoon, a last-chance reminder before points expire, or an event tomorrow.

SMS marketing needs the right consent and an easy opt-out in every message. See loyalty programmes, UK GDPR and PECR.

Email

Email is slower but holds far more: photos of a new menu, the story behind a product, an invitation with details. It suits monthly updates and seasonal campaigns. A clear subject line and a single call to action matter more than design.

An example month of messages for a café

Here is what a restrained, effective month might look like for an independent café with a few hundred members. It uses each channel once or twice, and only for audiences the message suits.

Writing messages that people act on

Whatever the channel, the messages that work share a few traits. They are about the customer, not the business (“your £4 balance” beats “we have an offer”). They contain one clear action and, where it’s true, a reason to act now. And they sound like a person: the owner of a local café, not a corporate marketing department.

Keep wallet pushes to one short sentence. Put the deadline and the opt-out in every SMS. For email, spend most of your effort on the subject line, because it decides whether anything else is read. Avoid ALL CAPS, strings of emojis and words like “FREE!!!”, which feel spammy and can hurt delivery.

How often is too often?

There is no universal number, but a useful rule for a small business is: a customer should rarely get more than one promotional message a week from you across all channels, and most months they should get fewer. Automatic service messages about their balance don’t count towards that, as long as they don’t contain promotions.

Watch the signals. If wallet cards are being removed, SMS opt-outs rise or email unsubscribes jump after a campaign, you are sending too much or to the wrong people. Narrower audiences almost always beat more frequent sends.

Combining channels without annoying people

A sensible sequence for a promotion might be an email announcing it, a push reminder on the day, and nothing more. Sending the same message by push, SMS and email at the same moment just trains customers to ignore you.

In Unity, each promotion can have several delivery methods, each with its own channel and scheduled time, so you can plan the sequence once. Pair channels with audience segments so only relevant customers receive each message. See all the options on the customer notifications page.