The leading loyalty and rewards program for Shopify — turn one-time buyers into loyal fans with points, referrals, and VIP tiers that drive repeat purchases and increase lifetime value.
- Free plan available
- 5,900+ Shopify reviews
- Points + referrals + VIP
- Easy setup
Smile.io (formerly Sweet Tooth) is the most widely used loyalty program app in the Shopify ecosystem. It lets you reward customers for purchases, referrals, account creation, social follows, and birthdays — building a habit loop that brings people back.
The free plan is genuinely functional. You get points programs and basic referrals without paying a dime, which makes it easy for new stores to start building customer loyalty from day one. As your store grows, the paid tiers unlock VIP programs, advanced analytics, and integrations with tools like Klaviyo and Gorgias.
What distinguishes Smile.io is how frictionless it is for customers. The on-site pop-up showing point balances, the referral links, and the VIP tier progress bar are all polished, branded elements that feel native to your store rather than bolted on.
Repeat customers spend 67% more than new ones on average. A well-configured Smile.io program can meaningfully shift that balance for any store with an existing customer base.
✅ Pros
- Excellent free plan
- Points, referrals, and VIP in one app
- Clean, branded customer-facing widgets
- Strong Klaviyo integration
- Easy to set up in under an hour
- 5,900+ 5-star reviews
⚠️ Cons
- Advanced analytics locked to paid tiers
- VIP programs need $49+/mo plan
- Limited customization on free plan
Pricing
- Points program
- Basic referrals
- Unlimited members
- VIP tiers
- Advanced analytics
- Klaviyo integration
- Custom branding
- API access
- Priority support
Shopify stores with repeat-purchase products (beauty, supplements, food) who want to build long-term customer loyalty.
Ready to try Smile.io?
Free plan — start rewarding your customers today.
Get Started with Smile.io →Free plan available · No credit card needed