Mobile Wallet Push Notifications vs SMS vs Email: Which Channel Gets More Attention?

Three numbers define the mobile marketing channel debate: 69%, 98% and 20%. Wallet push notifications achieve a 69% open rate. SMS reaches approximately 98% of recipients who open it. Email averages around 20% in most industries. But open rate alone does not tell you which channel to use — cost, consent requirements, message constraints and timing all matter. This article breaks down each channel honestly and tells you when to use which.

Email: low cost, rich content, modest attention

Email remains the default marketing channel for most businesses, and for good reason. The cost per send is effectively zero at scale — most email service providers charge a flat monthly fee regardless of volume above certain thresholds. The format supports rich HTML content: images, multi-column layouts, embedded links, full brand design. There is no character limit that matters in practice.

The problem is attention. A 20% open rate is the industry average, and that figure has been declining year on year as inboxes fill and Gmail's Promotions tab filters marketing email away from the primary view. Spam filters are increasingly aggressive; a message that your subscribers genuinely want to receive may never reach them if your domain reputation takes a hit from a single large send.

Email also has no real-time presence. A message sent at 10 am may not be opened until Thursday evening. For time-sensitive communications — a flash sale ending in four hours, a gate change at an airport — email is the wrong tool.

Best for: onboarding sequences, detailed product information, monthly newsletters, receipts and transactional confirmations, issuing wallet passes.

SMS: near-certain delivery, real cost, strict consent

SMS has the highest open rate of any commercial channel: approximately 98% of text messages are opened, and the majority within three minutes of receipt. This is a function of how people use their phones — a notification badge on the messages app creates an almost irresistible pull to read.

The costs are real. UK SMS pricing typically runs £0.04–0.08 per message depending on volume and provider. A campaign to 50,000 subscribers costs between £2,000 and £4,000 per send. At scale, that cost is sustainable; for small businesses sending regular campaigns, it accumulates quickly.

UK SMS marketing requires explicit opt-in consent under PECR (Privacy and Electronic Communications Regulations) and GDPR. Consent must be freely given, specific, informed and unambiguous. This is not a technicality — the ICO has issued six-figure fines for non-compliant SMS marketing campaigns. You need a compliant opt-in flow and a clear unsubscribe mechanism in every message.

The format is constrained: 160 characters for a single SMS segment, up to 1,600 for a linked multi-part message (though recipients often see this as a single long text). No images, no clickable buttons — just text and a URL. Rich media (MMS) is available but costly and patchy in delivery.

Best for: time-critical alerts (appointment reminders, one-time passcodes, order dispatched notifications), high-value transactional messages where delivery certainty justifies the cost.

Wallet push: high engagement, free after issue, no separate opt-in

Wallet push notifications occupy a different position in the channel stack. When a customer adds your pass to their wallet — Apple Wallet or Google Wallet — they implicitly consent to receive pass update notifications. There is no separate opt-in flow required; the act of adding the pass constitutes the consent. This is a significant operational advantage over SMS.

The open rate sits at 69% — substantially above email, below SMS. The cost after the pass is issued is zero: push notifications are delivered through Apple Push Notification Service (APNS) and Google's push infrastructure at no charge per message. A campaign to 50,000 pass holders costs the same as a campaign to 500 — nothing beyond the platform fee.

The constraints are real. On Apple Wallet, the lock screen notification text is generated automatically by the system — you cannot customise the exact wording. On Google Wallet, you can set a custom header and body through the addMessageRequest API, but the body is limited to plain text with no rich media. Messages should be under 100 characters to avoid truncation on the lock screen.

Critically, wallet push only works for pass holders. A customer who has not added your pass to their wallet cannot receive a wallet push. This makes the wallet pass add rate — how many customers who receive the pass link actually add it — a critical metric to manage.

Best for: loyalty point balance updates, tier upgrades, expiry reminders, event-day notifications, flash offers to existing customers.

Channel comparison

The combined approach

The most effective mobile marketing stack does not pick one channel — it sequences them deliberately. Here is the pattern that works:

Use email to issue the pass. Email is the natural delivery vehicle for the initial pass link. A well-designed onboarding email explaining the benefits of the pass — loyalty points, exclusive offers, event access — drives the add rate. Issuepass generates the add-to-wallet link and can embed it directly in your outgoing email campaigns.

Use wallet push for real-time updates. Once the customer has added the pass, wallet push handles all ongoing communication: points balance changes, tier upgrades, expiry reminders and flash offers. It is faster than email, free per send and does not require the customer to remember to check anything.

Reserve SMS for critical transactional messages. One-time passcodes, appointment reminders where no-shows have a cost, delivery notifications for high-value orders — these justify the per-message cost because guaranteed delivery matters. Do not use SMS for marketing campaigns when wallet push can do the same job at zero marginal cost.

This stack is also the most cost-efficient. Email reduces the cost of pass issuance to near zero. Wallet push eliminates the per-message cost of SMS for loyalty communications. SMS is deployed sparingly where its delivery certainty and urgency characteristics are worth paying for.

How Issuepass supports the full stack

Issuepass handles pass creation, distribution and lifecycle management across both Apple Wallet and Google Wallet. Our email delivery templates embed add-to-wallet links directly. From the dashboard or API, you can send wallet push notifications to individual passes, segments or your entire pass list — Apple and Google simultaneously, at no per-message cost.

For businesses already running SMS campaigns, the wallet pass channel does not replace SMS — it replaces the low-urgency, high-frequency messages that currently consume most of your SMS budget.

Start free and start sending wallet push notifications to your customers today.