Swish (formerly Wishlist King) vs. Sirius Wish: An In-Depth Comparison

Introduction

Choosing the right wishlist app is one of the small decisions that can disproportionately affect retention, conversion and customer lifetime value. Shopify merchants often face dozens of wishlist options that look similar on the surface but differ in features, integrations, onboarding and long-term value. This article compares two wishlist-focused Shopify apps—Swish (formerly Wishlist King) and Sirius Wish—so merchants can make an informed choice.

Short answer: Swish (formerly Wishlist King) is a polished, feature-rich wishlist solution with strong integrations, free setup and proven social proof, making it suitable for merchants who want a reliable production-ready wishlist with analytics. Sirius Wish targets stores that need a lightweight, session-limited wishlist with a low-cost entry path but currently lacks public reviews and clear third-party integration depth. For merchants who prefer fewer apps and an integrated retention strategy, an all-in-one solution such as Growave offers a broader set of retention tools that often provide better value for money.

Purpose: This post provides a feature-by-feature, data-driven comparison of Swish and Sirius Wish across UX, customization, analytics, integrations, pricing, support and scale. The goal is to help merchants pick the best match for their goals and highlight when an integrated platform is a smarter choice.

Swish (formerly Wishlist King) vs. Sirius Wish: At a Glance

Deep Dive Comparison

Product Positioning and Developer Background

Swish (formerly Wishlist King)

Swish is the rebranded Wishlist King. It positions itself as a “feature-rich wishlist solution for brands with ambition,” emphasizing customization, free setup, and integrations (Klaviyo, GA4, Meta). The app targets stores that want a polished wishlist experience with analytics and automated notifications. Swish lists support for headless stacks and Hydrogen, and offers priority plans for Shopify Plus stores including a dedicated account manager.

Sirius Wish

Sirius Wish is presented as a straightforward wishlist tool that enables customers to create and manage wishlists. Its messaging focuses on reducing cart abandonment and providing insights into customer preferences. Pricing is usage-based, with a free plan that includes session and action limits. There are no public reviews to validate claims, and the available data does not show explicit third-party integrations like Klaviyo or GA4.

Features: What Each App Actually Does

Core Wishlist Functionality

• Swish
  • Persistent wishlists per account and sessions, unlimited saved items.
  • Wishlist buttons and pop-ups integrated across product, collection and cart pages.
  • Shareable wishlists and wishlist curation features to surface popular items.
  • Automated wishlist-based notifications (reminders, price drop alerts).
• Sirius Wish
  • Save-for-later and wishlist creation functionality.
  • Basic add/remove/manage actions for wishlist items.
  • Focus on reducing cart abandonment by keeping products visible for later purchase.

Analysis: Both apps cover the basic need—letting customers save preferred products—but Swish offers more advanced wishlist management, automation, and sharing capabilities that drive discovery and re-engagement beyond the basic “save for later” pattern.

Customization and Design

• Swish
  • Strong emphasis on theme compatibility and a visual match to store aesthetics.
  • Free setup and customization across all plans ensures the widget matches brand UI/UX and works smoothly with themes.
  • Headless/Hydrogen support and Plus plan white-glove onboarding are available for complex storefronts.
• Sirius Wish
  • Claims effortless integration with Shopify themes but lacks detailed documentation on deep customization.
  • Given the app’s lighter feature set, customization options may be limited to standard color and placement adjustments.

Analysis: For merchants who care about design parity and a seamless customer experience, Swish’s free setup and theme compatibility are meaningful. Stores using headless setups or unique storefront frameworks will find Swish’s Hydrogen/headless support advantageous.

Analytics & Reporting

• Swish
  • Describes advanced analytics and wishlist curation tools that help identify high-interest products, wishlist-to-purchase conversion and customer segments.
  • Integrations with GA4 and other analytics tools enable richer attribution and behavioural insights.
• Sirius Wish
  • Mentions insights into customer preferences but provides limited public detail on analytics depth or exportable data.

Analysis: Analytics matter when wishlist behavior is used to optimize merchandising, email flows and paid-media retargeting. Swish’s explicit GA4 and analytics support give it an edge for data-driven merchants.

Integrations & Ecosystem Compatibility

• Swish
  • Explicitly lists integrations with Klaviyo, GA4 and Meta, plus compatibility with Hydrogen and headless stacks.
  • Works with Shopify Checkout, Customer Accounts, Search Recommendations and other platform features.
• Sirius Wish
  • The data supplied shows no specified integrations or platform connectors beyond core Shopify integration.

Analysis: A wishlist is most effective when wishlist data feeds email automation, ads audiences, and on-site personalization. Swish’s clear integration list is a tangible advantage. Sirius Wish may be passable for merchants not using email/A/B testing or ad retargeting, but it becomes limiting for stores that want to act on wishlist signals across marketing channels.

Notifications & Automated Flows

• Swish
  • Supports personalised and automated wishlist notifications to prompt purchase at the right moment (price-drop alerts, stock reminders).
  • Integration with Klaviyo enables wishlist events to trigger email and SMS flows.
• Sirius Wish
  • Primary messaging centers on reduced cart abandonment via saved items but lacks explicit automation or integration detail.

Analysis: Automated triggers linked to wishlist behavior materially improve conversion if implemented correctly. Swish’s ability to feed wishlist events into existing lifecycle flows is a clear operational benefit.

Pricing & Value

Swish Pricing Summary

• Basic Shopify — $19/month: All features, free setup, unlimited wishlists & sessions.
• Shopify — $29/month: Same included features.
• Advanced Shopify — $49/month.
• Shopify Plus — $99/month: Adds white-glove onboarding, priority support, dedicated account manager, Hydrogen & headless support.

Value notes:

• Swish’s pricing is straightforward and not usage-capped: unlimited wishlists and sessions are included. Free setup and migration reduce friction and learning cost.
• The Plus tier is explicitly aimed at enterprise merchants needing dedicated resources and headless support.

Sirius Wish Pricing Summary

• Free: 6000 sessions, 100 wishlist actions.
• Starter — $14.99/month: 12,000 sessions, 1500 wishlist actions.
• Pro — $49.99/month: 60,000 sessions, 15,000 wishlist actions.
• Premium — $89.99/month: 110,000 sessions, 60,000 wishlist actions.

Value notes:

• Sirius Wish uses a usage model with session and wishlist action caps, so costs grow with traffic/interactions.
• The free plan offers a way to test the app, but caps may force upgrades quickly for stores with moderate traffic.
• Pricing might appear lower at entry, but the long-term cost depends on session/action volume.

Comparative Analysis: Which Model Provides Better Value?

• Predictability vs. Scalability: Swish’s flat-fee unlimited model allows predictable budgeting. Sirius Wish’s usage caps may be cost-effective for very small stores but can scale into higher monthly fees as traffic grows.
• Feature-to-price ratio: Swish includes integrations and onboarding, which have tangible operational value. Sirius Wish’s cheaper tiers are paired with constraints that reduce usefulness for growing stores.
• For merchants who plan to use wishlist data across email, ads, and analytics, Swish’s inclusive integrations often represent better value for money compared with a usage-capped tool that requires additional apps.

Support, Onboarding & Documentation

• Swish
  • Free setup and customisation across all plans is a standout benefit. Onboarding reduces risk and shortens time-to-value.
  • Shopify Plus customers receive white-glove onboarding and a dedicated account manager.
• Sirius Wish
  • No explicit free setup or dedicated onboarding is mentioned. Support channels and SLA are not specified in the supplied data.

Analysis: Merchant time and developer resources are often underestimated costs. Swish’s free setup is a material advantage for stores that prefer vendors that handle implementation. Sirius Wish could still be suitable for stores with development resources and low complexity, but that requires more in-house effort.

Technical Considerations: Performance, Headless & Scalability

• Swish
  • Explicit hydrogen and headless support expands applicability to modern storefronts and enterprise setups.
  • Unlimited sessions and wishlists make it suitable for high-traffic stores.
• Sirius Wish
  • The session-limited plans suggest the app is optimized for lower-touch, quota-managed usage. Without stated headless support, enterprise headless setups may face limitations.

Analysis: For fast-growing merchants or stores implementing headless architectures, Swish’s explicit headless support and unlimited usage are safer.

Privacy, Data Ownership & Security

• Both apps operate within Shopify’s app ecosystem and must adhere to platform rules.
• Swish’s integrations with analytics and email providers mean merchants should confirm data handling, customer consent and synchronization behavior.
• Sirius Wish’s lack of public reviews and limited integration details warrant a deeper due diligence check before trust-dependent use (e.g., sharing customer email addresses or event data).

Recommendation: Merchants should request a data flow diagram and details about storage, retention, and GDPR/CCPA compliance during evaluation calls before installing either app.

Implementation & Maintenance Over Time

• Swish
  • Free setup decreases initial maintenance; ongoing updates and compatibility with themes are supported by the vendor.
  • Priority support options for Plus plans reduce long-term operational overhead.
• Sirius Wish
  • Simpler feature sets may mean less ongoing maintenance, but session limits and lack of integration depth can increase administrative work—managing quotas and data exports as traffic grows.

Consideration: A wishlist that integrates into lifecycle flows reduces manual exports and segmentation work. If the wishlist remains siloed, it creates a maintenance burden for marketers.

Use-Case-Oriented Recommendations

• Choose Swish if:
  • The store needs advanced wishlist features (sharing, alerts, analytics).
  • Integrations with Klaviyo, GA4 and Meta are required.
  • The brand uses headless/Hydrogen or plans to scale without worrying about usage caps.
  • Free onboarding and a polished, theme-matching UI are priorities.
• Choose Sirius Wish if:
  • The store has low traffic and wants a low-cost entry point with predictable session/action limits.
  • The merchant prefers a lightweight, simple wishlist and does not require deep integrations or automation.
  • The team is prepared to handle more of the integration and automation work internally.
• Consider Growave or an integrated platform if:
  • The merchant wants to consolidate retention, reviews, referrals and wishlist in a single suite to reduce app sprawl and maintenance.
  • There is a need to link loyalty or referral signals to wishlist behaviour for more sophisticated retention strategies.

The Alternative: Solving App Fatigue with an All-in-One Platform

App Fatigue and Its Costs

App fatigue appears when merchants accumulate single-purpose apps—one for wishlists, another for loyalty, yet another for reviews and referrals. The consequences include:

• Fragmented data: Customer signals live in multiple places, making orchestration and attribution difficult.
• Increased maintenance: Multiple vendors, invoices and integrations increase operational friction.
• Rising costs: Monthly fees multiply and overlap, reducing return on ad spend and increasing total cost of ownership.
• Slower experimentation: Each new feature requires separate installation and testing, delaying initiatives.

A wishlist is valuable only when wishlist behavior is connected to lifecycle activities: reward points for added items, wishlist-triggered emails, social proof from wishlisted products, and referral incentives for shared wishlists. Single-purpose apps often lack the connective tissue.

Growave’s “More Growth, Less Stack” Value Proposition

Growave addresses app fatigue by combining loyalty, referrals, reviews & UGC and wishlist into a single platform designed for retention and lifetime value. The core idea is to consolidate retention features so merchants can orchestrate cohesive customer experiences without managing multiple vendors.

Key aspects of Growave’s approach:

• Integrated retention toolkit that links wishlists to loyalty and review behaviors.
• Centralized analytics and customer profiles for coherent audience building.
• Enterprise features for Plus stores and headless architectures.

Merchants evaluating a wishlist should consider whether they want an isolated feature or an integrated retention engine that leverages multiple signals for higher LTV.

How Consolidation Improves Outcomes

• Better personalization: Wishlist actions can automatically feed loyalty programs and email segments, amplifying lifetime value.
• Unified rewards: Grant points when customers add items to a wishlist or when wishlist items convert—this ties acquisition incentives to retention metrics.
• Simpler reporting: One platform collects reviews, referral conversions and wishlist events, simplifying measurement of program ROI.

Merchants can see practical benefits such as higher repeat purchase frequency, improved conversion on wishlist-triggered notifications, and lower maintenance costs when retention features are consolidated.

Growave Feature Highlights in Context

• Loyalty & Rewards
  • Growave supports customizable loyalty programs and VIP tiers that turn wishlist engagement into points and incentives. Merchants can build loyalty and rewards that drive repeat purchases and tie those programs directly to wishlist behavior.
• Reviews & UGC
  • Reviews and user-generated content build trust for wishlisted products and improve conversion. Growave enables merchants to collect and showcase authentic reviews, which can be surfaced on product pages and in promotional flows.
• Wishlist
  • Growave includes wishlist functionality that is integrated with loyalty and referral logic. The wishlist is not a silo but a signal that powers communication, rewards and personalization.
• Plus & Enterprise Support
  • For high-growth brands, Growave offers solutions for high-growth Plus brands including headless support, dedicated launch planning and advanced integrations.
• Social Proof & Inspiration
  • Merchants can explore customer stories from brands scaling retention to see how combining referrals, loyalty and reviews with wishlist signals produces measurable lift.

Contextual links above direct merchants to learn more about specific capabilities without interrupting the narrative. The aim is to show how an integrated platform reduces tool sprawl and improves retention outcomes.

Pricing & Migration Considerations

Moving from single-purpose apps to an integrated platform requires evaluating costs and migration effort. Growave offers tiered plans to match growth needs and includes a free trial that helps merchants evaluate fit before a long-term commitment. As merchants evaluate options, it’s useful to compare integrated pricing tiers and consider long-term total cost of ownership rather than only monthly sticker price.

Merchants should weigh:

• Costs saved by retiring multiple single-purpose apps.
• Time saved through unified onboarding and a single support channel.
• Incremental revenue from better-orchestrated retention programs.

Practical Migration Checklist

• Audit existing tools and map features that must be preserved.
• Export wishlist and customer data from current apps.
• Confirm integrations needed (email, support, POS, headless).
• Implement incremental rollouts to test wishlist UX, loyalty triggers and review flows.
• Monitor KPIs for lift in repeat purchase, LTV and wishlist-to-purchase conversion.

A consolidated vendor often simplifies these steps because the same provider owns cross-feature mapping and support.

Links and Where to Learn More

Merchants can explore the full feature set, pricing and install options:

• To assess plans and cost-effectiveness, merchants can review how to consolidate retention features.
• To add a combined retention stack through Shopify, teams can install Growave from the Shopify App Store.
• For program-specific detail, merchants can review how to collect and showcase authentic reviews and build loyalty and rewards that drive repeat purchases.

These resources help merchants quantify the benefits of replacing multiple single-purpose apps with a single integrated platform.

Decision Framework: Which App Fits Which Merchant?

Below is a practical checklist to help choose between Swish, Sirius Wish and an integrated platform like Growave. Rather than a single “winner,” the decision depends on priorities.

If the Merchant Prioritizes a Best-in-Class Wishlist UX

• Choose Swish for polished UI, free customization and automated wishlist notifications.
• Advantages: theme parity, analytics, Klaviyo/GA4 support, headless compatibility.

If the Merchant Needs a Minimal, Cost-Conscious Wishlist

• Choose Sirius Wish for a low-barrier entry with a free tier and predictable session/action limits.
• Advantages: low starting price and simple setup for small catalogs and low traffic.

If the Merchant Wants to Reduce App Count and Grow LTV

• Choose a platform that bundles wishlist with loyalty, referrals and reviews.
• Advantages: fewer integrations, unified customer profiles, cross-feature automation.

Quick Heuristics

• If customer experience and data activation are critical: Swish or an integrated platform.
• If rapid experimentation with a no-cost entry is required and growth is uncertain: Sirius Wish.
• If the goal is to build sustainable retention and reduce vendor overhead: Growave.

Migration Examples and Implementation Tips (Actionable Steps)

Note: Examples are prescriptive steps, not fictional narratives.

• Preserve wishlist continuity: Export existing wishlist data or identify customer IDs before uninstalling the current app.
• Map wishlist events to lifecycle flows: Configure wishlist-added and wishlist-converted events in email automation (Klaviyo, Omnisend).
• Use wishlists to trigger targeted offers: For high-value wishlisted items, set up automated discounts or time-limited incentives to convert intent.
• Leverage UGC for wishlisted products: When customers purchase wishlist items, prompt them for reviews and photos to enhance future conversions.
• Test messaging cadence: Start with low-frequency wishlist reminders (e.g., price drop + 1 follow-up) and measure conversion uplift.

These steps reduce churn during migration and maximize the immediate ROI from wishlist signals.

Limitations and Risks

• Swish
  • As a single-purpose app, merchants still need separate tools for loyalty, reviews, referrals and post-purchase automation. This can lead to additional costs and integration complexity.
  • Pricing tiers tied to Shopify plan may require plan alignment for some merchants.
• Sirius Wish
  • Minimal public reviews make validation difficult—merchants should test functionality extensively on staging stores before full deployment.
  • Usage caps can quickly become a constraint for growing traffic.
• Integrated Platforms
  • Consolidation requires a higher initial investment and more onboarding during the first implementation. However, the long-term operational savings and cross-feature revenue potential often justify the investment.

Final Comparison Snapshot

• Strengths of Swish: Robust feature set, advanced analytics, free onboarding, integrations and headless support. Proven user satisfaction (272 reviews, 5.0 rating).
• Strengths of Sirius Wish: Simple model, free tier for testing, clear session/action pricing for small stores.
• Weaknesses of Swish: Single-purpose—requires additional apps for loyalty and reviews.
• Weaknesses of Sirius Wish: No public reviews to validate claims, limited integration detail, session limits can increase costs with scale.
• When to consolidate: If maintaining multiple retention apps is creating friction or data silos, consolidating into one platform improves lifetime value and operational simplicity.

Conclusion

For merchants choosing between Swish (formerly Wishlist King) and Sirius Wish, the decision comes down to intended use and scale. Swish is an excellent fit for brands that want a production-grade wishlist with analytics, integrations and free onboarding. Sirius Wish works for very small stores that need a lightweight, low-cost wishlist and are prepared to accept session-based limits. Neither approach solves the broader challenge of retention orchestration when loyalty, reviews, referrals and wishlist signals must be connected for maximum LTV.

For merchants ready to move beyond single-purpose apps and reduce tool sprawl, Growave offers an integrated alternative that combines wishlist functionality with loyalty, referrals and reviews. Consolidating retention features into one platform simplifies operations, centralizes customer data and enables cross-feature automation that tends to improve retention and lifetime value. Merchants can compare plans and evaluate total cost and benefits as they consider consolidation by reviewing how to consolidate retention features or by choosing to install Growave from the Shopify App Store.

Start a 14-day free trial of Growave to see how an integrated retention stack accelerates growth. Explore consolidated pricing and plans.

FAQ

• How do Swish and Sirius Wish differ in terms of integrations?
  • Swish lists explicit integrations with Klaviyo, GA4 and Meta and supports headless/Hydrogen setups. Sirius Wish advertises basic Shopify integration but does not publicly list advanced third-party integrations; merchants should request integration details before committing.
• Which app provides better long-term value for a scaling store?
  • Swish generally provides better value for scaling stores because it avoids session/action caps and includes free onboarding and analytics. Sirius Wish may be cost-competitive for micro stores, but usage caps can increase costs as traffic grows.
• How does an all-in-one platform compare to specialized apps?
  • An integrated platform reduces data fragmentation and operational overhead, enabling wishlist actions to trigger loyalty rewards, referral incentives and review prompts without separate integrations. This consolidated approach often results in better retention and higher lifetime value compared with stitching together multiple single-purpose apps.
• Can merchants migrate wishlists from one app to another without losing data?
  • Migration is feasible but requires planning: export wishlist items and link them to customer accounts, map events to existing email flows, and test on a staging environment. Merchants should coordinate with both vendors to preserve continuity and minimize customer disruption.