Shopify apps & templates

Tools for Shopify brands built to be remembered.

Install apps, templates, and operating systems designed to help Shopify brands watch their stores, automate the busywork, improve customer journeys, and build storefronts with a stronger story.

Shopify apps

Apps that help your store see, act, remember, and grow.

Our Shopify apps are built for merchants who need more than another dashboard. They help your store monitor what matters, automate the right actions, manage customer journeys, and turn daily operations into a clearer system.

In development

Margin Keep

Keep every promotion profitable — scan sale prices and codes, try Safety Studio, then add Protect campaign insurance.

Sale-price and discount audit with safer-% coach
Decision ledger and estimated profit protected
Protect campaign insurance: peak sale, alerts, pause, optional Block

Starting at $29/month

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In development

Arcanum Engine

Turn store signals into action with automation playbooks, team alerts, integrations, and directional impact tracking.

Playbooks for operations, growth, and recovery
Team alerts through email, Slack, Discord, or Klaviyo
Directional impact tracking tied to playbook runs

Starting at $29/month

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In development

Hollow Sentinel

Operational visibility for Shopify — daily briefings, health scores, store memory, and anomaly insights.

Daily briefings on what changed
Store health and anomaly signals from your baseline
Revenue at risk and deeper monitoring on Growth and above

Starting at $29/month

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In development

Hollow Reserve

Turn appointments into complete customer journeys with booking, service history, follow-up, and customer memory.

Booking flows for service-based stores
Customer history and journey memory
Follow-up systems for repeat visits

Starting at $29/month

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Run both apps together? View ecosystem bundles · Bundle guide

Shopify templates

Story-led storefronts for service-driven brands.

Our templates are designed for brands that sell experiences, not just products. Built for service-led businesses, appointment-based stores, salons, spas, studios, and specialty merchants that need their storefront to feel polished from the first visit.

Available

Studio Arcana

A premium Shopify storefront framework for salons, spas, tattoo studios, beauty brands, and service-led merchants.

Story-led homepage and service pages
Built for appointments, products, and trust-building
Flexible sections for premium brand storytelling

Starting at $450

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Need more than a self-serve install? Arcanum Hollow also offers setup, customization, automation, and custom storefront builds for merchants who want expert guidance from first concept to launch. Browse headless template packages below.

Ecosystem bundles

Watch with Hollow Sentinel and act with Arcanum Engine at matched tier levels — Essentials, Growth, and Commerce OS bundles cost less than subscribing to both apps separately.

Arcanum ecosystem bundles

Package	Investment	If bought separately	Includes
Arcanum Essentials	$49/month	$58/month	Arcanum Engine Starter · Hollow Sentinel Starter
Arcanum Growth	$169/month	$207/month	Arcanum Engine Growth · Hollow Sentinel Growth · Hollow Reserve Starter
Arcanum Commerce OS	$479/month	$507/month	Arcanum Engine Ops · Hollow Sentinel Scale · Hollow Reserve Professional · Premium reporting

Bundle SKUs roll out on the Shopify App Store as combined subscriptions become available. Engine and Sentinel plans remain available if bought separately anytime.

Looking for consulting? See initial audits & blueprints , custom ecommerce builds, strategic retainers or AI automation consulting.

Resources

Documentation and comparisons for Arcanum Shopify apps.

Privacy and data processing for Arcanum Shopify apps: View product legal pages